Adcom Home Theater System GTP 880 User Manual

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Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Unpacking your GTP-880 . . . . . . . . . . . . . . . . . . . . . . 5  
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Description of Unit  
1.1 Front Panel Illustration . . . . . . . . . . . . . . . . . . . . 6  
1.2 Introduction to the GTP-880 . . . . . . . . . . . . . . . 6  
1.3 Interface Overview . . . . . . . . . . . . . . . . . . . . . 6-9  
1.4 Surround Formats . . . . . . . . . . . . . . . . . . . . . 9-10  
1.5 Rear Panel Illustration . . . . . . . . . . . . . . . . . . . 12  
1.6 Input & Output System Connections . . . . . 13-15  
1.7 Connecting Components . . . . . . . . . . . . . . . 15-23  
Remote Control  
2.1 Remote Control Illustration ............... 24  
2.2 Overview of the GRC-810 . . . . . . . . . . . . . . . . 25  
2.3 Remote Features . . . . . . . . . . . . . . . . . . . . . 25-26  
2.4 Remote Function Table . . . . . . . . . . . . . . . . 26-31  
2.5 Programming the ADCOM GRC-810 ....... 32-33  
2.6 Programming Macro Buttons . . . . . . . . . . . . . . 33  
2.7 Function and Data List (Discrete) . . . . . . . 34-35  
Setup  
3.1 Setup Overview . . . . . . . . . . . . . . . . . . . . . . . . . 36  
3.2 On Screen Display . . . . . . . . . . . . . . . . . . . . . . . 36  
3.3 Input Configuration . . . . . . . . . . . . . . . . . . . 36-37  
3.4 Speaker Configuration ................. 37-39  
3.5 Channel Configuration ................. 39-41  
Channel Calibration  
Channel Trim  
3.6 Delay Configuration . . . . . . . . . . . . . . . . . . . 41-42  
3.7 System Configurations ................. 42-43  
3.8 Prologic II and Neo:6 Music Config . . . . . . 43-44  
3.9 Room Two Configuration . . . . . . . . . . . . . . . 44-45  
3.10 Additional Options . . . . . . . . . . . . . . . . . . . 45-46  
Resolving Problems . . . . . . . . . . . . . . . . . . . . . . . . . 48  
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Caring for your GTP-880 . . . . . . . . . . . . . . . . . . . . . 50  
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . 50  
GTP-880 Specifications . . . . . . . . . . . . . . . . . . . . . . 51  
3  
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THE FOLLOWING PRECAUTIONS AND SAFETY INSTRUCTIONS  
ARE REQUIREMENTS OF UL AND CSA SAFETY REGULATIONS  
Warning: To reduce the risk of fire or electric shock, do  
not expose this unit to rain or moisture.  
ATTENTION  
POUR PREVENIR LES CHOCS ELECTRIQUES NE PAS UTILISER CETTE FICHE  
POLARISEE AVEC UN PROLONGATEUR, UNE PRISE CE COURANT OU UNE  
AUTRE SORTIE CE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES  
A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.  
CAUTION  
TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH  
AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE  
BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.  
The graphic symbol of a lightning flash with an  
arrow point within a triangle signifies that there  
is dangerous voltage within the unit and it poses  
a hazard to anyone removing the cover to gain  
access to the interior of the unit. ONIy qualified  
service personnel should make any such attempt.  
CAUTION POWER LINES  
Any outdoor antenna must be located away from all power lines.  
OUTDOOR ANTENNA GROUNDING  
If an outside antenna is connected to your tuner or tuner/preamplifier,  
be sure the antenna system is grounded so as to provide some protection  
against voltage surges and built-up static charges. Section 810 of the  
National Electrical Code, ANSI/NFPA No. 701984, provides information  
with respect to proper grounding of the mast and supporting structure,  
grounding of the lead-in wire to an antenna discharge unit, size of  
grounding conductors, location of antenna discharge unit, connection to  
grounding electrodes, and requirements for the grounding electrode.  
The graphic symbol of an exclamation point within  
an equilateral triangle warns a user of the device  
that it is necessary to refer to the instruction manual  
and its warnings for proper operation of the unit.  
Donotplacethisunitonanunstablecart, stand, tripod,  
bracket, or table. The unit may fall, causing serious  
injury to a child or adult, and serious damage to the  
unit. Use only with a cart, stand, tripod, bracket, or  
table recommended by the manufacturer or sold with  
the unit. Any mounting of the device should follow the  
manufacturer’sinstructions, andshoulduseamounting  
accessory recommended by the manufacturer.  
a. Use No.10 AWG (5.3 mm2) copper, No.8 AWG (8.4 mm2) aluminum, No.17  
AWG (1.0 mm2) copper clad steel or bronze wire, or larger, as a ground wire.  
b. Secure antenna lead-in and ground wires to house with stand-off  
insulators spaced from 46 feet (1.221.83 m) apart.  
Read all the safety and operating instructions before connecting or using  
this unit.  
c. Mount antenna discharge unit as close as possible to where lead-in enters  
house.  
Retain this notice and the owner’s manual for future reference.  
All warnings on the unit and in its operating instructions should be adhered to.  
All operating and use instructions should be followed.  
d. Use jumper wire not smaller than No.6 AWG (13.3 mm2) copper, or the  
equivalent, when a separate antenna grounding electrode is used. See NEC  
Section 810-21 (j).  
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE  
INSTRUCTIONS CONTAINED INARTICLE 810. RADIOAND TELEVISION EQUIPMENT.  
Do not use this unit near water. For example, near a bathtub, washbowl,  
kitchen sink, laundry tub, in a wet basement, or near a swimming pool.  
The unit should be installed so that its location or position does not interfere  
with its proper ventilation. For example, it should not be situated on a  
bed, sofa, rug, or similar surface that may block the ventilation openings;  
or placed in a built-in installation, such as bookcase or cabinet, that may  
impede the flow of air through its ventilation openings.  
The unit should be situated away from heat sources such as radiators, heat  
registers, stoves, or other devices (including amplifiers) that produce heat.  
The unit should be connected to a power supply outlet only of the voltage  
and frequency marked on its rear panel.  
The power supply cord should be routed so that it is not likely to be walked  
on or pinched, especially near the plug, convenience receptacles, or where  
the cord exits from the unit.  
Clean unit only as recommended in its instruction manual.  
The power supply cord of the unit should be unplugged from the wall outlet  
when it is to be unused for a long period of time.  
Care should be taken so that objects do not fall, and liquids are not spilled,  
into the enclosure through any openings.  
This unit should be serviced by qualified service personnel when:  
A. The power cord or the plug has been damaged; or  
B. Objects have fallen, or liquid has been spilled, into the unit; or  
C. The unit has been exposed to rain, or liquids of any kind; or  
D. The unit does not appear to operate normally, or exhibits a marked  
change in performance; or  
NOTE TO CATV SYSTEM INSTALLER  
This reminder is provided to call the CATV system installer’s attention to  
Article 82022 of the National Electrical Code that provides guidelines for  
proper grounding and, in particular, specifies that the cable ground shall  
be connected to the grounding system of the building, as close to the  
point of cable entry as practical.  
E. The device has been dropped, or the enclosure damaged.  
DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF.  
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.  
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Unpacking the GTP-880  
Before your new ADCOM tuner-preamplifier left our factory, it was carefully inspected for physical imperfections and test-  
ed for all electrical parameters as a routine part of ADCOM’s systematic quality control. This, along with full operational  
and mechanical testing, should ensure a product flawless in both appearance and performance. After you have unpacked  
the GTP-880, inspect it for physical damage. Save the shipping carton and all packing material as they are intended to  
reduce the possibility of transportation damage should the preamplifier ever need to be shipped again. In the unlikely  
event damage has occurred, notify your dealer immediately and request the name of the carrier so a written claim to  
cover shipping damages can be initiated. The right to a claim against a public carrier can be forfeited if the carrier is  
not notified promptly in writing and if the shipping carton and packing materials are not available for inspection by the  
carrier. Save all packing materials until the claim has been settled.  
ADCOM Protection Plan (USA only)  
ADCOM offers the enclosed valuable limited warranty. Please read the details on the warranty card carefully to understand  
the extent of the protection offered by the warranty, its reasonable limitations, and what you should do in order to obtain  
its benefits. Be sure to verify that the serial number printed on the rear panel matches the serial number on the outer  
carton. If any number is altered or missing, or if the ADCOM warranty card is not included in the carton, you should  
notify us immediately in order to ensure that you have received a genuine ADCOM product which has not been opened,  
mishandled, or tampered with in any way. Always retain your original sales receipt as a proof of purchase.  
This unit is manufactured under license from Dolby Laboratories Licensing Corporation. It is additionally licensed under  
one or more of the following patents: U.S. number 3,959,GTP-880, Canadian numbers 1,004,603 and 1,037,877.  
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®
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®
®
Dolby Pro Logic , Dolby ProLogic II , Dolby Digital EX , and Dolby Digital are registered trademarks of Dolby  
Laboratories Licensing Corporation.  
Manufactured under license from Digital Theater Systems, Inc. US Patent Number 5,451,942 and other world-wide  
®
®
®
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patents issued and pending. “DTS ,” “dts ,” “DTS Digital Surround ,” “DTS-ES ,” “DTS NEO:6 ” are trademarks of  
Digital Theater Systems, Inc. Copyright 2003 Digital Theater Systems, Inc. All Rights Reserved.  
ADCOM GTP-880 Owner’s Manual | 5  
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1.1 Front Panel Illustration  
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[ ]  
1 Standby Power Button  
[ ]  
4 Analog Direct Select  
[ ]  
7 Source Selections  
[ ]  
2 Room Two Control  
[ ]  
5 Digital Tuner Controls  
[ ]  
8 Volume Control Knob  
[ ]  
3 Bass & Treble  
[ ]  
6 Front Panel Display  
[ ]  
9 Surround Mode  
Note: The rear panel power switch must be on for this  
1.2 Introduction to the GTP-880  
button to function.  
Congratulations on your decision to purchase the ADCOM  
GTP-880 tuner-preamplifier. The GTP-880 provides Dolby  
Digital and DTS decoding with 7.1 output channels and  
the RDS (Radio Data System) tuner. You have made a wise  
choice that will reward you for years to come with excep-  
tionally accurate and musical sound reproduction. To real-  
ize the full potential of your new preamplifier, and before  
making any connections to it, please read these operating  
and installation instructions thoroughly.  
[ ]  
2 Room Two Control  
The GTP-880 has the ability to play and control an analog  
audio signal in a second room from the front panel or  
remote control. Any of the incoming analog audio signals  
can be distributed to the second room, with the exception  
of analog direct inputs.  
On/Off Button: Pressing this button activates the room  
two functionality and control. The on/off indicator light  
illuminates.  
1.3 Interface Overview  
The GTP-880’s front panel is designed for ease of  
operation. All controls are logically grouped for easy,  
intuitive operation. Familiarize yourself with the preced-  
ing diagram and read the short explanations of each fea-  
ture below. When you finish, you will be well on your way  
to enjoying the GTP-880’s convenience and sound quality.  
Note: This light will remain lit when the other  
indicators are off, as long as the second room is active.  
Pressing this button again turns room two off, indicator  
light extinguishes.  
Setup Button: Pressing this button enters the room two  
setup mode, pressing this button again will cycle a list of  
room two options. Use the volume control knob to make  
selections while in setup.  
[ ]  
1 Standby Power Button  
Pressing this button turns the unit on, indicator is red.  
Pressing this button again returns the GTP-880 to standby  
mode. The standby indicator is amber.  
After entering setup the first option presented turns room  
two off or on. Pressing this button again gives the option  
to select a source to be played in room two.  
In this mode of operation, the front panel display is turned  
off, control functions are disabled, and all outputs to the  
main room are turned off. Outputs to room two remain  
active and available. It should be noted that they are only  
“active” oif room two power is on.  
Pressing this button again presents the option to mute the  
output in room two.  
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Pressing this button again presents the option to set the  
listening volume in room two, range is -80dB to 10dB.  
FM tuner to stereo mode.  
The letter “S” will appear ONLY when a stereo station has  
been locked by the Digital Tuner. A flashing “S” indicates  
that the particular chosen station signal strength is not  
strong enough for the Digital Tuner to “lock” onto the ste-  
reo signal. In this instance, the user may want to consider  
placing the tuner into mono mode.  
Note: If no other selection is made while in setup, selections  
will be saved and configuration will exit within 5 seconds.  
[ ]  
3 Bass & Treble Adjustments  
These buttons control bass and treble equalization.  
Adjustments are made in 2dB steps.  
Memory Button: Pressing this button when FM or AM is select-  
ed as the input source memorizes the current station frequency  
into one of the presets. You can preset up to 32 stations.  
Bass Button: Pressing this button displays current bass  
setting, range is from -8dB to +8dB. Use the volume knob  
to make an adjustment.  
Tuner Up/Down Buttons: The function of these buttons depends  
Treble Button: Pressing this button displays current treble  
setting, range is from -8dB to +8dB. Use the volume knob  
to make an adjustment.  
on the tuning mode selected with the tune/preset button.  
In preset mode (indicated in the display area): Press the  
down button to scroll to a lower number preset; press the  
up button to scroll to a higher preset number. This is a  
“wrap-around” function, so that going from the highest  
number preset, the tuner will go to the lowest preset  
number or vice-versa when tuning either up or down.  
Bypass Button: Defeats the tone controls and provides  
an unaltered, full-bandwidth stereo signal to the left and  
right channel outputs on the rear panel. However, the  
subwoofer DSP crossover remains active and bass frequen-  
cies are available at the subwoofer output should you  
wish to augment your front L/R speaker’s low frequency  
performance. The word “bypass” appears in the front  
panel display. Pressing the button again returns the unit to  
the previously selected tone settings.  
In tune mode: Press the up or down button for more than  
1/2 second to engage automatic tuning respectively up or  
down the frequency band. The tuner will search automati-  
cally for the first reasonably strong radio station, where it  
will stop. Press the down/up button again for 1/2 second  
to start searching again.  
[ ]  
4 Analog Direct Selections  
These buttons select audio inputs from analog multichannel  
sources such as DVD Audio or SACD players. The 2 channel but-  
ton bypasses the DSP processing for the main selected input.  
Bypass 2 Channel mode provides straight two channel listen-  
ing. This mode is only applicable with an analog source, as this  
input signal bypasses all processing sending a full-range signal  
to the front Left and Right channels. However, if the user  
has set Subwoofer to be on in the system setup, a Low Pass  
Filtered matched signal to the crossover frequency set for the  
front left and right channels will be sent to the subwoofer  
in order to help reinforce the low-frequency response of the  
system. If the user truly has full-range speakers (20Hz-20kHz)  
and does not desire to have this bass reinforcement signal,  
the user need only disable the subwoofer in the system setup  
or in their system.  
The GTP-880 tuner can receiveAM, FM and FM stereo  
broadcasts. Up to 32 stations can be preset and accessed from  
the front panel or remote. Stations can also be tuned manually.  
Note: Tuner reception cannot take place unless an appro-  
priate AM and/or FM antenna is connected to the rear  
panel of the GTP-880.  
To operate the tuner:  
1. Press the tuner button on the remote control once, or  
press the tuner button on the front panel.  
This indicates that the tuner is in FM, with stereo selected  
as the surround mode. The number displayed next to the  
tuner text is the preset number currently selected or last  
selected, followed by the stereo reception indicator if the  
station is being received in stereo. The numbers next to  
the FM text are the frequency of the selected preset or  
station. The numbers in front of the dB indication are the  
current volume setting.  
[ ]  
5 Digital Tuner Controls  
FM/AM Button: Toggles between AM and FM frequency bands.  
FM Mode Button: Sets the FM tuner to mono mode. The  
letter “M” appears next to the tuner preset number in the  
front panel display. Pressing the button again returns the  
2. Press the AM/FM button on the remote control or the  
front panel to change between AM and FM bands.  
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This display indicates that the tuner is in AM with a  
selected preset and the frequency of that preset or  
station. The numbers in front of the dB indication are the  
current volume setting.  
To change a preset radio station:  
1. Tune to the new radio station you desire.  
2. Press and hold the mem button on the remote or the  
memory button on the front panel. The display will change  
to show the word “memory” along with a flashing number.  
3. Use the tune buttons on the front panel or the remote  
to change the tuner frequency. The new frequency will  
be displayed to the left of the volume level on the front  
panel display and OSD.  
3. Quickly enter the new preset/memory location (01 through  
32) using the numeric keypad on the remote. This replaces  
the previously memorized preset with your new selection.  
You have approximately five seconds to enter a number.  
Pressing a tune button once increases or decreases the FM  
frequency by .1 MHz and the AM frequency by 10 KHz.  
[ ]  
6 Front Panel Display  
4. Press and hold either the of the tune buttons on the  
front panel or the remote to scan continuously up or  
down the selected band. The tuner will stop on the next  
available station when you release the button.  
Indicates program source, DSP mode, tuner preset and/or  
frequency, digital input, volume level, and other GTP-  
880/tuner operating information. Also displays menu  
selections. Diming of the display may be accomplished via  
the remote control or through the on screen display.  
5. Press the FM mode button on the front panel to toggle  
between stereo and mono.  
The front panel display provides visual feedback of the  
current settings, surround modes and configuration menus  
of the unit. Information is constantly displayed at the  
front panel whenever the GTP-880 is turned on.  
If an FM station produces lots of noise or sound that cuts in  
and out while in stereo, use this control to change the FM  
mode from stereo to mono.  
The information presented on the front panel is identical  
to that shown on your TV monitor via the on screen dis-  
play, allowing you to perform speaker settings, set up your  
input sources, set the listening modes, and much more.  
If you select mono as the operating mode an indicator will  
appear next to the preset number.  
To preset a radio station into memory:  
1. Tune to the radio station you desire.  
[ ]  
7 Source Buttons  
2. Press and hold the mem button on the remote or the  
memory button on the front panel to store a station into a  
preset location. The display will change to show the word  
“memory” along with a flashing number.  
These buttons select the active video and audio input for  
the GTP-880. The source that is currently selected will be  
shown in the front panel display and the LED in the source  
button will be red.  
3. Quickly enter the desired preset/memory location (01  
through 32) using the numeric keypad on the remote. This  
programs the radio station to that memory location. You  
have approximately five seconds to enter a number.  
DVD, Video 1, Video 2, Video 3, VCR, AUX, CD, Tape  
Tuner: Pressing this button changes the source to the  
built-in AM/FM digital tuner. Please refer to digital tuner  
controls, previously detailed in this section for more  
instructions on using the GTP-880’s tuner.  
Up to 32 stations can be stored, randomly between AM and  
FM, in memory as presets.  
[ ]  
8 Volume control  
To tune to a radio station that you have preset:  
The volume control adjusts the overall loudness of the  
signals being fed to the preamplifier outputs. Unlike con-  
ventional controls, the GTP-880’s volume control doesn’t  
have a start or end position. Volume can also be adjusted  
from the remote control using the master volume up or  
down buttons. The volume control does not affect record-  
ings made using the tape or VCR outputs but will affect  
the signal going to the preamp outputs. The volume level  
is indicated in the display panel when it is being adjusted,  
1. Set the GTP-880 to tuner.  
2. Use the numeric keypad on the remote control to enter  
the two digit number of the preset that you want to hear.  
The tuner frequency (and band if it is different then the  
previously tuned station) changes to the new station in the  
preset memory of the GTP-880.  
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and after three seconds the display defaults to its previous rial, loudspeaker setup and personal taste. In addition,  
status. Volume setting can range from -80dB to +10dB.  
the GTP-880 precision bass management feature provides  
maximum flexibility when setting up your audio surround  
system (see “system setup” for further details).  
On the remote control, press the mute button to tempo-  
rarily switch off the sound to the preamp outputs. Mute  
mode is indicated by the word “mute” in the display area.  
Press mute again or adjusting the volume will restore  
sound. Mute does not affect recordings made using the  
tape or VCR outputs but does affect the signal going to the  
preamp outputs.  
ADCOM 7.1m²™: ADCOM’s proprietary decoding algorithm.  
The 7.1m²™ decoding process mixes the signals from the  
left surround and right surround channels to derive two  
unique signals sent to each back output. The benefit of  
our 7.1m²™ decoding process is enhance imaging between  
the surround speakers and the creation of a more diffuse  
ambient sound field. The 7.1m²™ process has the same  
benefits when compared to other matrix decoding as  
stereo signals have over mono signals. The 7.1m²™  
process can also be used to drive your surround back  
speakers when you are listening to an externally decoded  
DVD audio or SACD multichannel disc. Due to the varying  
nature of film soundtracks and music, you may prefer to  
activate or deactivate the surround back channels. For  
example, Dolby Digital 5.1 and DTS soundtracks benefit  
greatly from the addition of the 7.1m²™ processing.  
ProLogic soundtracks on the other hand provide a mono  
surround signal track, which yields a less satisfying  
experience when using the surround back channels.  
Adjusts the volume level for the main room only. Room  
two is not affected by this control.  
[ ]  
9 Surround Mode Buttons  
With the surround mode buttons the available surround  
sound modes can be selected. The selected surround mode is  
permanently indicated in the display area and is also shown  
for three seconds in the large text section of the display.  
7.1m²™ Button: Pressing this button activates ADCOM’s  
proprietary decoding algorithm.  
This proprietary analog-domain post-processing technique  
takes 5.1 channel or other sources that have surround  
channel information and extracts a psuedo-stereo sur-  
round back channel information. Only DSP modes that do  
NOT generate more than 2 surround channels (e.g. - Dolby  
Digital, DTS, 5 Stereo, Dolby Pro Logic, Dolby Pro Logic  
II Cinema, Dolby Pro Logic II Music, DVD-Audio Bypass  
Input, SACD Bypass Input) can benefit from ADCOM 7.1m2  
post-processing. Trying to enable ADCOM 7.1m2 during any  
other DSP mode (e.g. Dolby Digital EX, DTS-ES Extended  
Surround, 7 Stereo, 2 Channel Bypass) is Invalid and will  
be indicated as such by the system. Additionally if the  
system setup up does NOT indicate that the system setup  
offers 2 surround back channels, ADCOM 7.1m2 will never  
be offered as option.  
Note: 7.1m2 decoding may only be applied to 5 channel signals.  
Dolby Digital: This digital audio format provides 5.1-  
channel surround sound. Dolby Digital source material  
includes DVDs, laser discs, HDTV broadcasts, some satellite  
delivered programming, and the output of some digital  
cable set top boxes.  
Dolby Digital Surround EX: This processing mode is a joint  
development of Dolby Laboratories and the THX division  
of LucasFilm, Ltd. Film soundtracks encoded with Dolby  
Digital Surround EX technology contain an extra channel,  
added to the soundtrack during mixing, called surround  
back, which places audio behind the listener in addition to  
the existing front left, front center, front right, surround  
left, surround right, and subwoofer channels. This  
additional channel provides more detailed imaging behind  
the listener creating more depth, spacious ambience and  
sound localization than before.  
Pressing this button again turns 7.1m²™ decoding off and  
returns to previously selected surround mode.  
Select Left/Right Button: Pressing this button cycles  
through list of available surround modes.  
1.4 Surround Format Information  
Note: Surround EX mode can also be engaged during the  
playback of 5.1 channel material that is not Dolby Digital  
Surround EX encoded. When used this way, signals from  
the left and right surrounds are used to synthesize the  
surround back channel. Results using this method will vary  
The GTP-880 provides decoding for Dolby Pro Logic®  
II, Dolby Digital® 5.1, Dolby Digital EX®, DTS®, DTS-  
ES® Discrete, DTS-ES® Matrix, DTS NEO:6® and ADCOM  
7.1m²™. Within each mode, the GTP-880 also offers a wide  
range of additional processing options. This means you can  
precisely match a surround mode to your program mate-  
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depending on the source material.  
decoder, even if they have a surround back speaker(s) in  
their setup.  
Surround EX decoding is ONLY applicable to 2/2.0, 2/2/  
.1, 3/2.0, 3/2.1 streams AND when there is one or two  
surround back channels available in the system.  
The GTP-880 will automatically sense the availability of  
either DTS-ES format and automatically switch the pro-  
cessing mode when required.  
Dolby Pro Logic II: Dolby Pro Logic II is a substantial  
enhancement to the original Pro-Logic process. In addition  
to full-bandwidth surrounds, Pro Logic II provides three  
unique user adjustable processing options: panorama;  
dimension; and center width. Used primarily in Pro Logic.  
DTS NEO:6-C (Cinema): This processing mode can create  
up to 6 full bandwidth channels from any matrix-encoded  
2 channel source. Additionally, this mode can produce the  
rear surround information from a 5.1 source.  
Dolby Pro Logic II-C (Cinema): This processing mode can  
create up to 6 full bandwidth channels from any stereo, 2  
channel source, idea for use with movies.  
DTS NEO:6-M (Music): In music mode it can expand stereo  
music material, into a multichannel surround experience.  
Stereo: This mode provides conventional 2 channel signals  
from a stereo or downmixed multichannel to the left and  
right front speakers only. With an analog and digital input  
source, the signal is decoded (if AC-3 or DTS) and then  
downmixed (if a multichannel source) and then bass-  
management is applied which allows for the HPF on the  
front speakers to match the LPF set on the subwoofer.  
Delays are offered on the front and subwoofer channel in  
this mode as well.  
Dolby Pro Logic II-M (Music): In music mode there are  
three additional adjustments.  
Panorama provides an extension of the front stereo image  
to the surround channels creating an enveloping, wrap-  
around effect.  
Dimension enables adjustment of the surround image  
between the front and rear of your room. Certain types of  
music benefit from smoother overall balance and a more  
natural sounding image.  
Stereo 5: This mode is designed for use with stereo program  
material. It is designed to get maximum output from all  
your speakers. The rear speakers are driven with the same  
signal as the front left and right, while the center speaker is  
a monophonic summation of the front speakers.  
Center width provides variable adjustment of the center  
channel image and location, to create a more seamless  
front soundstage as well as control of the sense of “width”  
across the L/C/R loudspeaker array. A phantom center  
image can also be created from just the left and right  
front speakers.  
Stereo 7: This mode is designed for use with stereo program  
material. It is designed to get maximum output from all  
your speakers. The rear speakers are driven with the same  
signal as the front left and right, while the center speaker is  
a monophonic summation of the front speakers.  
DTS: This compressed digital data format is similar to Dolby  
Digital. DTS also provides 5.1 channel surround channels and  
is available on compact disc, DVD and laser discs. Audio-only  
DTS discs may be used with any CD, LD or DVD player with a  
digital audio output, but DVD discs with DTS audio must be  
used on players with the “DTS Digital Out” logo.  
Additional Information  
More detailed information about the various surround  
processing options contained in the GTP-880 can be found  
on the following websites:  
DTS-ES: An extension of the original DTS format that  
adds an additional sixth, or center surround, channel to  
a soundtrack. DTS-ES Matrix 6.1 titles provide a surround  
back channel by a matrix decoding process, while DTS-ES  
Discrete 6.1 media deliver a true discrete center surround  
channel. Both DTS-ES formats are backwards compatible  
with the original DTS process, and will deliver a 5.1  
channel output when no center or back surround speakers  
are available. Additionally, the user may force the system  
to decode a DTS-ES Matrix 6.1 stream or DTS-ES Discrete  
6.1 stream using the DTS Digital Surround 5.1 channel  
www.dolby.com & www.dtsonline.com  
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Placement of your GTP-880  
A distance of 1/2” should be maintained around the GTP-  
880 for ventilation. Keep your GTP-880 in a room where  
temperatures remain fairly moderate, and never cover  
it with table cloths, curtains, newspapers, etc., to avoid  
potential overheating.  
Your system components need a stable, vibration-free  
supporting surface. Your ADCOM dealer will be pleased to  
show you many different types of audio/video equipment  
racks and cabinets. Keep the GTP-880 (and other audio/  
video components) away from moisture and out of direct  
sunlight. Bear in mind that the GTP-880’s rear panel is the  
central connecting point for almost every component in  
your audio/video system. Leave sufficient room behind the  
rear panel to accommodate cables, antenna leads, power  
cords, etc. We recommend a minimum of 5 inches of free  
space behind the GTP-880 for maximum flexibility.  
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1.5 Rear Panel Illustration  
29  
31  
28  
30  
23  
10  
20 21  
15  
11  
12  
13  
16  
18  
24  
25  
17  
19  
26  
14  
22  
27  
[10] DVD Component Video Input  
[11] Video 1 Component Input  
[12] Video 2 Component Input  
[13] Monitor Component Output  
[14] Analog Audio Source Inputs  
[15] AM/FM Antenna Inputs  
[16] S-Video Inputs  
[21] IR Inputs (main/room 2)  
[22] Room 2 Analog Audio Output  
[23] RS232 Control (DB9)  
[24] SACD Input (DB25)  
[25] DVD Audio Input  
[26] Analog Bass Management  
[27] Main Analog Audio Output  
[28] Digital Audio Inputs  
[29] Digital Audio Outputs  
[30] Main Power Switch  
[31] AC Input  
[17] S-Video Output  
[18] Composite Video Inputs  
[19] Composite Video Output  
[20] 12V DC Trigger (main/room 2)  
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Note: No on screen text messages are available on  
1.6 Input & Output System Connections  
Like the front panel, the GTP-880’s rear panel is carefully  
arranged to make hookup, configuration, and use as sim-  
ple as possible. However, the GTP-880’s capabilities take  
some study to use most effectively. We strongly suggest  
that you read this section of the manual before beginning  
to hook up your system. You will save yourself much time  
and effort if you carefully think out what you expect from  
your system: consider the components you will use, where  
they’ll be placed, and how you will want them to work  
together. The diagrams and notes in this section will prob-  
ably answer most of your questions about interfacing the  
GTP-880 with other components in your system.  
component video.  
[ ]  
15 AM/FM Antenna Inputs  
FM Antenna terminal: Use to connect the supplied FM  
antenna or an external 75 Ω antenna. Do not over tighten  
as this may damage the connection.  
The supplied FM antenna is for indoor use only. For best  
signal reception you must fully extend the antenna. Ex-  
periment with the antenna’s position to obtain the stron-  
gest signal. You can attach it to a wall or other surface  
using push pins or similar apparatus.  
If reception is poor with the supplied indoor antenna, using  
an amplified indoor or outdoor antenna is recommended.  
Note that the GTP-880’s RCA-style jacks have color-coded  
centers to make connections easier. Use this key to help  
route cables properly:  
Note: You can only connect a 75Ω type FM antenna to the  
GTP-880. If you choose to use an antenna other than the  
one supplied, be sure to verify that it has the correct type  
of connector or that you obtain an appropriate adaptor.  
RED centers  
= RIGHT CHANNEL ANALOG  
AUDIO inputs or outputs  
Try to avoid using the same antenna for both FM and TV  
reception since the signals can interfere with each other.  
If you must use a common FM/TV antenna, be sure that  
you install an splitter to separate the two signals.  
WHITE centers = LEFT CHANNEL ANALOG  
AUDIO inputs or outputs  
YELLOW centers = video inputs (composite)  
AM Antenna terminals: Connect the supplied AM loop  
BLACK centers = DIGITAL AUDIO inputs and  
CENTER CHANNEL and  
antenna or an external AM antenna to these terminals.  
SUBWOOFER inputs and outputs  
Connect the AM antenna to the terminals labeled AM and  
gnd (ground) on the rear panel of the GTP-880. Start by  
pressing the lever on the side of one of the terminals to  
the right. Next, insert one of the antenna wires into the  
opening. Finish by returning the lever to the up position,  
securing the wire. Do the same for the other wire to  
complete installation.  
[ ]  
10 DVD Component Video Input  
Use this set of dedicated jacks to connect a DVD player  
with component video output.  
[ ]  
11 Video 1 Component Input  
Use this set of jacks to connect devices with component  
video outputs such as a DVD player or HDTV tuner.  
[ ]  
16 S-Video Inputs  
[ ]  
12 Video 2 Component Input  
Use these inputs for connection to the s-video output from  
sources such as a DVD or LD player, satellite receiver, cable  
box, PVR or other video source. Note that when the compo-  
nent video inputs are used, connect the analog audio outputs  
of the source to the DVD or Video 1 jacks, as appropriate.  
Use this set of jacks to connect devices with component  
video outputs such as a DVD player or HDTV tuner.  
[ ]  
13 Monitor Component Video Output  
Use these jacks to supply component video output to an  
external monitor that accepts component video signals.  
Connect the VCR-OUT jack to the input of a VCR or other  
recorder and connect the OUT jack to an s-video input on  
your video display device.  
Note: No OSD is available on the component video output.  
[ ]  
14 Analog Audio Source Inputs  
[ ]  
17 S-Video Main Output  
Use these inputs for connection to analog audio sources  
such as a CD player. One in/out tape loop is provided for  
connection to an audio recorder.  
Connect this output to the s-video input of your monitor or  
other video display device.  
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The room two jack is provided to enable remote control  
of the GTP-880’s room two system through the use of an  
optional remote sensor in the second room. Connect the  
sensor to the room two jack using a mono mini-plug and  
the wiring specified by the sensor’s manufacturer.  
[ ]  
18 Composite Video Inputs  
Use these inputs for connection to the composite video  
output from sources such as a DVD or LD player, satellite  
receiver, cable box, PVR or other video source. Note that  
when the component video inputs are used, connect the  
analog audio outputs of the source to the DVD or video 1  
jacks, as appropriate.  
[ ]  
22 Room 2 Analog Audio Output  
Use these jacks to supply the analog stereo audio output  
to an optional audio amplifier used to power the speakers  
in room two.  
[ ]  
19 Composite Video main Output  
Connect this output to the composite video input of your  
monitor or other video display device.  
Use the L and R channel room two out audio jacks to con-  
nect the GTP-880 to the analog audio inputs of an external  
amplifier or other audio component in a second room. The  
analog signal present will reflect the input selection of the  
GTP-880. This may be adjusted using the room two menu  
or the rm. 2 button on the remote control.  
[ ]  
20 12V DC Trigger (main/room 2)  
The DC trigger jacks are used to remotely turn-on other  
devices in your system when the GTP-880 is powered on.  
Power is applied to the main trigger output jack when the  
GTP-880 is turned on from the standby mode. We recom-  
mend that this jack be used to turn on a compatible power  
amplifier such as those available from ADCOM, but it may  
also be used to activate compatible products such as  
projection screens or motorized blinds.  
[ ]  
23 RS232 Control (DB9)  
Allows control of the GTP-880 via computer or home  
automation system.  
[ ]  
24 SACD Inputs (DB25)  
Connect a mono mini-plug between the DC trigger main  
jack on the rear panel of the GTP-880 and the low voltage  
trigger jack of the device to be controlled to enable re-  
mote turn-on of that component. The room 2 trigger jack  
is activated when the room two system is turned on and  
should be used for control of amplifiers used to power the  
speakers installed in room two. It will remain activated as  
long as the room two system is on, even when the GTP-880  
is in the standby mode for the main room.  
Connect the multichannel signal from the analog audio  
outputs of a device such as a DVD, DVD-A or SACD.  
[ ]  
25 DVD Audio Inputs  
Connect the multichannel signal from the analog audio  
outputs of a device such as a DVD, DVD-A or SACD.  
[ ]  
26 MultichannelAnalog Bass Management  
Analog bass management is totally separate from the DSP  
bass management, set up using a three position switch on  
the rear panel, and applied to multichannel analog inputs.  
[ ]  
21 IR Inputs (main/room 2)  
Use the main and room two remote jacks to connect  
external IR sensors to the GTP-880. When the unit is  
installed behind doors or where it is not otherwise visible  
to the remote, connect an optional, external sensor to the  
main jack. To control the GTP-880’s room two system from  
a remote location, connect an optional remote sensor in  
the second room to the room two jack.  
Up Position: LPF/HPF both on  
This position is ideal for owners who have speakers that  
only have a frequency response that goes down to around  
80Hz (@-3dB). All bass information is summed, low-pass-  
filtered (@ 80Hz) and sent to the subwoofer.  
80Hz high-pass crossover for L, C, R, LS, and RS: (12dB/octive)  
80Hz low-pass crossover for subwoofer: (12dB/octive)  
The remote jacks allow you to extend the on-board remote  
control sensor on the GTP-880’s front panel so that you may  
continue to control the GTP-880 even when it is installed  
behind solid or smoked cabinet doors or when the front  
panel sensor is otherwise not visible to the remote control.  
Middle Position: LPF on/HPF bypassed (subwoofer bass  
reinforcement mode)  
This position is also ideal for owners who have speakers  
in their system that are full range (or at least have a  
frequency response that extends below 80Hz) however  
the user still desires that summed and low-pass-filtered  
audio information be sent to the subwoofer which helps to  
To extend the remote sensor connect an optional remote  
sensor to the main jack.  
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reinforce the low-end frequency response of the system.  
80Hz low-pass crossover for subwoofer: 12 dB/octave  
Warning: Never disconnect the power cord from the GTP-880  
while the other end is plugged into an AC outlet. Doing so may  
cause an electric shock. Always connect power by plugging into  
the AC outlet last and disconnect by unplugging from the AC  
outlet first.  
Down Position: LPF/HPF complete bypass path (analog  
multichannel input bass management disabled)  
This position is ideal for DVD-Audio/SACD multichannel  
players which already include integrated bass management,  
a user has another multichannel analog bass management  
device, or all speakers in the system are full-range.  
1.7 Connecting Components  
Always refer to the instructions that came with the com-  
ponent that you are connecting for specific procedures,  
warnings and options.  
[ ]  
27 Main Analog Audio outputs  
For all analog connections, the red input jacks (R) are  
used for the right channel, white input jacks (L) are used  
for the left channel, and yellow input jacks (V) are used  
for the composite video connection.  
Use the seven audio channel output jacks to connect the  
GTP-880 to an external power amplifier. The eighth jack  
supplies the output to a powered subwoofer or external  
subwoofer amplifier.  
Make sure to insert all plugs and connectors securely. Im-  
proper connections can result in noise, poor performance,  
or damage to the equipment.  
[ ]  
28 Digital Audio Inputs  
Use these inputs to connect the coaxial and optical digital  
audio signal output from such digital devices as CD, DVD or  
LD players. These inputs are fully assignable using the OSD.  
Do not bundle audio/video connection cables with power  
cords and speaker cables. Doing so may adversely affect  
the picture and sound quality. For example, run all the  
power cords down one side of the cabinet, all the signal  
cords down the other side, and the speaker wires down  
the center.  
[ ]  
29 Digital Audio Outputs  
Use the coaxial and optical digital outputs to connect the  
GTP-880 to a device such as CD recorder, DAT recorder, or  
other similar device that accepts a digital audio input.  
[ ]  
30 Main Power Switch  
When connecting devices to the digital inputs and outputs,  
you may also consider hooking up the analog connections  
to and from the components to insure that all signals can  
be employed by the GTP-880.  
Turns the current to the GTP-880 on or off. Setting this  
button to the on position (pushed in) supplies power to  
the unit, enabling use of the standby power button on  
the front panel. When the main power switch is in the off  
position, current is cut off to the unit.  
When using the optical input or output jacks, remove the  
protective cap and keep it in a safe place. When these  
jacks are not in use the protective cap should be replaced.  
[ ]  
31 AC Input  
Use to connect the supplied AC power cord (see page 2).  
When using an optical input or output jack, always use a  
high-quality optical fiber cable.  
Before proceeding, please observe the following precau-  
tions when connecting devices to your new GTP-880.  
Important Note: We strongly recommend that before you  
connect any loudspeakers to your amplifiers, you complete  
all needed connections and set up procedures to your GTP-  
880 as outlined below. This will reduce the chance that a  
miss connection or other error will produce audio output  
that might damage your speakers or other components.  
Do not plug the power cord into your GTP-880 until  
all other connections have been made.  
Insert the supplied power cord into the AC input of the  
rear panel of the GTP-880. Do not use a power cord other  
than the one supplied with the GTP-880. It’s designed for  
use with the GTP-880 and should not be used with any  
other device.  
Caution: Before you plug the power cord into an AC wall outlet, con-  
firm that all connections to the GTP-880 have been made correctly.  
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External Amplifier  
Important Note: Before attempting to plug any jacks into  
DVD Player  
Composite: Connect the composite video output from the  
any power amplifier verify that the power amplifier is  
DVD player to the DVD video input jack on the rear of the  
turned off and/or disconnected from the AC mains. Failure GTP-880 using an RCA-type video cable.  
to do so can potentially result in severe damage to your  
S-video: If there is an s-video output on the DVD player,  
amplifier and loudspeakers.  
and you have an s-video input on your TV or monitor, con-  
nect it to the s-video DVD input on the rear of the GTP-880  
using an s-video cable. S-video delivers a better picture  
than composite connections and should be used whenever  
Use the audio jacks labeled main audio outputs to connect  
the GTP-880 to an external power amplifier such as the  
ADCOM 7807 power amplifier. The GTP-880 can output up  
to 7.1 channels of sound (seven satellite and one subwoofer possible unless you can use component connections, which  
channel) depending on source components and material.  
deliver better video than s-video.  
The output jacks supplied by the GTP-880 are:  
left front, center, right front, left surround, right  
surround, left surround back, right surround back,  
and subwoofer.  
Component: If the DVD player has component video out-  
puts, connect them to the DVD component video input jacks  
on the rear of the GTP-880 using an appropriate cable set.  
Note: OSD messages do not appear on component video.  
Be sure to verify that the correct outputs are connected to AnalogAudio: Connect the L and R channel outputs on the DVD  
the appropriate input jacks (left front to left front, right  
surround back to right surround back, etc..)  
player to the DVD in audio jacks on the rear of the GTP-880.  
Digital Audio: Connect one of the digital output jacks on  
the DVD player to one of the coaxial (coax 1-3) or optical  
(opt 1-3) input jacks on the rear of the GTP-880, depending  
on the type of connector used by the DVD player. The fac-  
tory preset for DVD is coax 1. Later, you can configure the  
GTP-880 to use the specific input that you have chosen.  
When a powered subwoofer is used, connect the subwoof-  
er output jack to the Line Input jack on your subwoofer  
and follow any specific connection and/or configuration  
instructions supplied with the subwoofer. If your sub-  
woofer is a passive speaker, connect the subwoofer output  
jack on the GTP-880 to the input of the amplifier used to  
power the subwoofer, and then connect the subwoofer  
speaker itself to the amplifier.  
Use a GFA-7807 Power Amplifier (pictured above) or the GFA-7607 for seven channel  
surround sound setups. Five channel versions of these amplifiers are also available.  
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Multi Channel Audio: If your DVD player supplies a mul-  
tichannel audio output (for DVD Audio or SACD playback),  
connect the six outputs (special cable sets for this are  
available from numerous sources) from your player to the  
six input jacks labeled DVD Audio input on the rear panel  
of the GTP-880. Be sure match the connections—left to  
left, right surround to right surround, and so on.  
as well as the s-video main out and VCR out jacks.  
Any signal that appears at the s-video input jacks (DVD,  
VCR, video 1, 2 or 3) is automatically sent to the s-video  
out and VCR out jacks, as well as the composite video out  
and VCR out jacks.  
Any signal that appears at the component video (DVD,  
video 1, or video 2) input jacks is automatically sent to the  
monitor component output connection only and only when  
that source is selected.  
If you are connecting a DVD-Audio or SACD player to the  
GTP-880 using these jacks, you will need to consider the  
setting for the analog bass management switch on the  
GTP-880’s rear panel (see previous section for details).  
Note: To provide the greatest signal flexibility, be sure  
to connect all available types of inputs and outputs from  
your video devices. For example, if only the composite  
video output (yellow RCA jack) connection is made to your  
display device, component sources will not be available,  
CD Player  
Analog: Connect the L and R channel outputs on the CD  
player to the CD IN jacks on the GTP-880.  
Digital: If your CD player has a digital output jack, connect even if they are connected to the GTP-880.  
it to one of the coaxial (coax 1-3) or optical (opt 1-3) input  
Video Recorder  
jacks on the GTP-880, depending on the type of connector  
A video recording device such as a VCR, PVR (such as a  
used by the CD player. Later, you will configure the GTP-  
TiVo®, Replay®, UltimateTV®, DishPlayer® or similar  
880 to use the specific input that you have chosen.  
device) or DVD recorder can be connected to the GTP-880  
Audio Recorder  
using the following methods.  
A recording device such as a cassette deck, MD recorder,  
DAT deck or CD recorder can be connected to the GTP-880  
using either or both of the following methods.  
Composite: Connect the composite video output from the  
recording device to the VCR in composite video jack on  
the rear of the GTP-880. Connect the recording device’s  
composite video input to the VCR out composite video jack  
of the GTP-880 using an RCA-type video cable.  
Analog: Connect the L and R audio outputs on the recorder  
(usually marked “play”) to the tape in jacks on the rear of  
the GTP-880 and connect the L and R audio inputs (usually  
marked “rec”) to the tape out jacks of the GTP-880.  
S-video: If there is an s-video output on the recording de-  
vice, connect it to the s-video VCR in input on the rear of  
the GTP-880 and connect the s-video input to the s-video  
Digital: If your recorder has a digital output jack, connect  
it to one of the coaxial (coax 1-3) or optical (opt 1-3) input VCR out using an s-video cable. S-video delivers a better  
jacks on the GTP-880, depending on the type of connector  
used by the device. Later, you will configure the GTP-880  
to use the specific input that you have chosen.  
picture than composite connections and should be used  
whenever possible unless you can use component connec-  
tions, which deliver better video than s-video.  
If your recorder has a digital input jack, connect it to  
either the coaxial or optical output jack on the GTP-880.  
The signal from the selected digital input source of the  
GTP-880 will be sent to the recorder.  
Component: If the recording device has component video  
outputs, connect them to one of the component video  
input jacks (DVD, video 1, video 2) on the rear of the GTP-  
880 using an appropriate cable set.  
Video Components  
Analog Audio: Connect the L and R audio outputs on the  
recorder to the VCR in audio jacks on the rear of the GTP-  
880 and connect the L and R inputs of the recorder to the  
VCR out audio jacks on the GTP-880.  
Before making connections to any video devices, it will  
help to understand how the GTP-880 routes the video  
portion of the signal.  
Any signal that appears at one of the composite video  
input jacks (DVD, VCR, video 1, 2 or 3) is automatically  
sent to the composite video main out and VCR out jacks,  
Digital Audio  
If your recording device also has a digital audio output  
jack, connect it to one of the coaxial (coax 1-3) or optical  
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(opt 1-3) input jacks on the rear of the GTP-880, depend-  
ing on the type of connector used by the device. Later,  
you will configure the GTP-880 to use the specific input  
that you have chosen.  
Video Display  
A video display device such as a television monitor, fixed-  
pixel device (plasma or LCD) or video projector can be  
connected to the GTP-880 using the following methods.  
If your recording device also has a digital input jack, con-  
nect it to either the coaxial or optical output jack on the  
rear of the GTP-880, depending on the type of connector  
used by the device. The signal from the selected input  
source of the GTP-880 will be sent to the recorder.  
Composite: Connect the composite video input from the  
display to the composite video main out jack on the rear  
of the GTP-880 using an RCA-type video cable.  
S-video: If there is an s-video input on the display, con-  
nect it to the s-video main out jack on the rear of the  
GTP-880 using an s-video cable. S-video delivers a better  
picture than composite connections and should be used  
whenever possible unless you can use component connec-  
tions, which deliver better video than s-video.  
Satellite Tuner or Television  
Composite: Connect the composite video output from  
the satellite tuner or television to one of the video input  
jacks (video 1, 2 or 3) on the rear of the GTP-880 using an  
RCA-type video cable.  
S-video: If there is an s-video output on the satellite tuner  
or television, connect it to one of the s-video inputs (video  
1, 2 or 3) on the rear of the GTP-880 using an s-video  
cable. S-video delivers a better picture than composite  
connections and should be used whenever possible unless  
you can use component connections, which deliver better  
video than s-video.  
Component: If the display has component video inputs,  
connect them to the monitor component output jacks on  
the rear of the GTP-880 using an appropriate cable set.  
Note: Since the GTP-880 converts composite video to  
s-video and vice versa, you need only make one of those two  
types of connections between the GTP-880 and your video  
display. However, when component video connections are  
used it is still necessary to make either the composite or s-  
video connections so that you are able to view the on-screen  
menus and displays which do not appear on the monitor  
component output. The GTP-880 does not convert from  
either composite or s-video to component or vice versa.  
Component: If the satellite tuner or television has com-  
ponent video outputs, connect them to one of the com-  
ponent video input jacks (DVD, video 1 or video 2) on the  
rear of the GTP-880 using an appropriate cable set.  
Analog Audio: Connect the L and R channel outputs on the  
satellite tuner or television to the set of audio input jacks  
(video 1, 2 or 3) directly under the video jack used on the  
rear of the GTP-880.  
Digital Audio: If your satellite tuner or television has a digi-  
tal output jack, connect it to one of the coaxial (coax 1-3)  
or optical (opt 1-3) input jacks on the rear of the GTP-880,  
depending on the type of connector used by the device.  
Later, you will configure the GTP-880 to use the specific  
input that you have chosen.  
18 | ADCOM GTP-880 Owner’s Manual  
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Connection Diagram:  
GTP-880 to a GFA-7807 Amplifier  
GFA-7807 Power Amplifier  
ADCOM GTP-880 Owner’s Manual | 19  
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Connection Diagram:  
GDV-850 DVD Player to the GTP-880  
Direct Analog Input (DVD Audio)  
GDV-850 DVD Player  
GTP-880 Tuner Preamp  
20 | ADCOM GTP-880 Owner’s Manual  
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Connection Diagram:  
GDV-850 DVD Player to the GTP-880  
Digital & Analog Stereo Input  
GDV-850 DVD Player  
GTP-880 Tuner Preamp  
ADCOM GTP-880 Owner’s Manual | 21  
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Connection Diagram:  
Analog Source (CD, VCR, etc.)  
to the GTP-880 Analog Input  
Analog Source  
GTP-880 Tuner Preamp  
22 | ADCOM GTP-880 Owner’s Manual  
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Connection Diagram:  
GTP-880 Video Outputs  
ADCOM GTP-880 Owner’s Manual | 23  
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2.1 GRC-810 Remote Control  
[ ]  
32 Main Button  
[ ]  
33 Source Selection Buttons  
[ ]  
34 Power Button  
32  
33  
[ ]  
35 Mute Button  
[ ]  
36 Volume Up & Down Buttons  
[ ]  
37 Tape & Aux Buttons  
34  
35  
[ ]  
38 Dynamic Range Button  
36  
[ ]  
39 Play Button  
37  
38  
41  
[ ]  
40 Main Menu Button  
[ ]  
41 Navigation & Select Buttons  
39  
42  
40  
[ ]  
42 Pause Button  
[ ]  
43 Stop Button  
43  
45  
[ ]  
44 Direct Access Keypad  
[ ]  
45 Surround Mode Buttons  
[ ]  
46 Direct Analog Input Buttons  
[ ]  
47 Random & Repeat Buttons  
44  
[ ]  
48 Ch. Trim & FM/AM Button  
[ ]  
49 Ch. Cal & Memory Button  
46  
48  
49  
53  
47  
[ ]  
50 Th-Eq & P.Scan Button  
[ ]  
51 Tone & Tune Down Button  
50  
51  
52  
[ ]  
52 Bypass & Tune Up Button  
[ ]  
53 Macro Buttons  
[ ]  
54 Room 2 Button  
54  
55  
56  
[ ]  
55 Backlight Button  
[ ]  
56 Dim Button  
24 | ADCOM GTP-880 Owner’s Manual  
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The ADCOM universal remote controller is preset to  
operate all GTP-880 functions (main and tuner device  
mode) and most ADCOM DVD and CD player functions.  
2.2 Overview of the GRC-810  
The GRC-810 remote control is a learning remote con-  
trol that is capable of saving commands for all remote  
controls in your home theater system. In this way, you  
may eliminate the confusion of using multiple remotes.  
Although such power comes with some added complexity,  
the complexity is minimal and with some repetition will  
become second nature.  
Alkaline batteries are recommended for maximum operat-  
ing life. Four AAA (R 03) batteries should be fitted in the  
battery compartment at the rear of the remote control.  
When replacing batteries, check that they have been put  
in correctly, as indicated on the base of the battery  
compartment.  
The single most important aspect to master about the GRC-  
810 remote control is the function of the source selection  
buttons at the top of the remote. Each of these buttons  
cause two things to happen when used. First, they select  
the corresponding input on the GTP-880. Second, these  
keys remap all of the other buttons on the remote control.  
You can think of each of these buttons as having a page  
of commands associated with it. Some buttons, such as  
volume up and down, are pre programmed to operate the  
GTP-880 for each source. These buttons can be “written  
over” if you like, but default to GTP-880 operations for  
your convenience.  
2.3 Remote Features  
[ ]  
32 Main Button  
In all modes, button provides access and control to the  
GTP-880.  
[ ]  
33 Source Selection Buttons  
These buttons switch inputs on the GTP-880, making the  
selected source active. They also can change the func-  
tions of other buttons on the remote controller.  
[ ]  
34 Power Button  
In all modes, this is pre programmed to toggle on/standby  
the GTP-880 power.  
Most of the GTP-880 remote commands are saved under  
the main remote page. Whenever you desire to control  
the GTP-880 via remote, you must first ensure the main  
page is active. As an example, press main on the remote  
control. Now, press the dim button. If your GTP-880 is on,  
the brightness of the front panel display changes. Notice  
also that the main button on your remote illuminates.  
This serves as a reminder that the main remote page is  
currently active. Now press the CD button and then the  
play button. Notice now that the CD source button lights.  
The CD remote page is now active. If you have an ADCOM  
GCD-750 player, this command will cause an idle CD to  
play. Now, press the dim button again. You should note  
that CD button does not light. The dim command is not  
pre programmed in the CD remote page. If your GTP-880  
is on you will also notice the display does not respond to  
this command. Press the main button again to reenter the  
main remote page. The dim button will now again change  
the GTP-880 display.  
[ ]  
35 Mute Button  
In all modes, this button is pre programmed to mute  
outputs of device. Any adjustment of the volume control  
while in the mute mode will release the muting.  
[ ]  
36 Volume Up & Down Buttons  
In all modes, these buttons change the master volume  
setting of the GTP-880. In all modes except main, they  
can be reprogrammed with new commands.  
[ ]  
37 Tape & Aux Buttons  
In main mode, these are similar to the source selectors  
described above but they switch only GTP-880 inputs.  
They do not automatically change the functions of other  
remote buttons.  
[ ]  
38 Dynamic Range Button  
The d. range button, which can be used only in combina-  
tion with a Dolby Digital source, incrementally reduces  
the audio track’s dynamic range in four steps to allow for  
comfortable listening under a variety of conditions. Adjust  
using the and buttons or the d.range button.  
The button description that follows distinguishes the func-  
tion of each button dependent on the page the remote is  
in. The remote is shipped from the factory with ADCOM  
commands saved under the main, tuner, DVD, and CD  
pages, and with important GTP-880 functions such as  
volume saved under each page.  
[ ]  
39 Play Button  
In CD and DVD mode, it is pre programmed for play with  
an ADCOM GCD-750 and GDV-850.  
ADCOM GTP-880 Owner’s Manual | 25  
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button is used to program radio stations in memory.  
[ ]  
40 Main Menu Button  
In main mode, this is pre programmed to enter on screen  
[ ]  
50 Th-Eq & P.Scan Button  
menu of the GTP-880.  
In main mode this button turns theater compensation pro-  
cessing on and off.  
[ ]  
41 Navigation & Select Buttons  
In tuner mode this button scans the AM or FM stations  
preset in the tuner’s memory.  
The arrow buttons allow navigation throughout the GTP-  
880 OSD (ON Screen Display) menus (as well as the menus  
of other devices, once the commands are learned).  
Select button: In main mode, this is pre programmed to  
enter a selection chosen via the menu system.  
[ ]  
51 Tone & Tune Down Button  
In main mode this button cycles between the treble and  
bass level control, use the left and right buttons to make  
adjustments.  
[ ]  
42 Pause Button  
In tuner mode this button adjusts the GTP-880 tuner’s  
frequency down.  
In CD and DVD mode, it is pre programmed for pause with  
an ADCOM GCD-750 and GDV-850.  
[ ]  
52 Bypass & Tune Up Button  
[ ]  
43 Stop Button  
In main mode this button turns tone bypass on and off. In  
tuner mode this button adjusts the GTP-880 tuner’s  
frequency up.  
In CD and DVD mode, it is pre programmed for stop with  
an ADCOM GCD-750 and GDV-850.  
[ ]  
44 Direct Access Keypad  
[ ]  
53 Macro Buttons  
In CD mode, buttons are pre programmed as track access  
commands for the ADCOM CD player. Buttons “1” through  
“10,” and “+10”  
These buttons are programmable for use with any source.  
[ ]  
54 Room 2 Button  
In tuner mode these buttons allow direct access to preset  
stations in memory.  
In any mode, this button is used turn room 2 on and off,  
as well as adjust room settings using the  
buttons.  
In DVD mode, buttons work in conjunction with direct  
chapter navigation. Use the go to/enter to jump to a  
specific chapter or scene.  
[ ]  
55 Backlight Button  
No programming capabilities. Button backlights all keys  
for eight (8) seconds when pressed.  
[ ]  
45 Surround Mode Buttons  
[ ]  
56 Dim Button  
In main mode, these are pre programmed to cycle through  
In main mode, button is pre programmed to dim  
the available surround modes of the GTP-880.  
GTP-880’s information display.  
[ ]  
46 Direct Analog Input Buttons  
2.4 Remote Function Table  
These buttons switch the analog inputs to one of the ana-  
The tables on the following pages supplement the infor-  
mation you’ve just read. Use it to quickly review button  
functions. The controller’s capabilities are extensive and  
may be somewhat intimidating at first. However, you  
will soon find that its logical button arrangement and  
programming capabilities will greatly increase your enjoy-  
ment as you discover the ease with which you can operate  
your entire system from just one remote! Look down the  
left-hand column until you see the button you want to  
learn about. Then look under main to see if it is pre pro-  
grammed for a GTP-880 function, under CD to see what  
CD commands are pre programmed, and under tuner to  
see all pre programmed tuning functions.  
log direct inputs. DVD-Audio, SACD or a 2 channel bypass.  
[ ]  
47 Random & Repeat Buttons  
In CD mode, these buttons are pre programmed as  
“random” and “repeat” commands for ADCOM CD player.  
[ ]  
48 Ch. Trim & FM/AM Button  
In main mode, this button cycles through channels adjust-  
ing trim in 1dB steps, -15dB to +10dB. Use the left and  
right arrows to make adjustments. In tuner mode this but-  
ton switches the tuner between FM and AM frequencies.  
[ ]  
49 Ch. Cal & Memory Button  
In main mode, this button cycles through channels  
adjusting level in 1dB steps, -15dB to +10dB. Use the left  
and right arrows to make adjustments. In tuner mode this  
26 | ADCOM GTP-880 Owner’s Manual  
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Custom Code: 1AE5h  
Code Type: NEC  
Carrier Frequency: 38kHz  
Buttons  
main  
DVD  
Function: Main  
Code  
Function: DVD  
selects 880 codes  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles dvd power on/off  
selects 880 tape input  
selects 880 aux input  
toggles dvd audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
dvd navigation up  
dvd navigation downdvd  
navigation right  
dvd navigation left  
dvd select/enter  
dvd - play  
Code  
195  
135  
134  
136  
131  
132  
133  
137  
101  
138  
139  
121  
223  
213  
209  
100  
61  
selects 880 codes  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
64  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
880 navigation up  
880 navigation down  
880 navigation right  
880 navigation left  
880 select/enter  
dvd - play  
VCR  
CD  
vid 1  
vid 2  
vid 3  
tuner  
power  
tape  
aux  
mute  
d.range  
Vol  
Vol  
65  
67  
104  
60  
66  
3
113  
113  
99  
select  
113  
129  
118  
50  
play  
calls up 880 osd menu  
dvd - pause  
dvd menu  
menu  
dvd - pause/step  
dvd - stop  
49  
pause  
dvd - stop  
50  
stop  
1
144  
145  
146  
147  
148  
149  
150  
151  
152  
154  
153  
210  
84  
1
36  
1
2
2
37  
2
3
3
127  
39  
3
4
4
4
5
5
40  
5
6
6
41  
6
7
7
42  
7
8
8
43  
8
9
9
44  
9
0
0
35  
0
+10  
+10  
45  
+10  
direct tune entry  
7.1m2 on/off  
dvd go-to  
116  
enter  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
dvd - repeat (1/all)  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
backlight  
7.1m2  
Dolby  
toggles dolby modes  
toggles dts modes  
toggles stereo modes  
toggles dvd-a direct  
toggles sacd direct  
toggles 2 channel direct  
programmable  
dvd - repeat  
87  
86  
DTS  
85  
stereo  
DVD-A  
SACD  
71  
70  
68  
2-ch  
random  
repeat  
ch.trim/AM/FM  
ch. cal / mem  
th-eq / p.scan  
tone / tune  
bypass / tune  
m1  
122  
199  
80  
222  
207  
77  
122  
channel bal. trim adjust  
noise gen./trim adjust  
toggles comp on/off  
toggles treble/bass adj.  
toggles tone bypass  
programmable  
programmable  
programmable  
programmable  
displays room 2 setup  
backlight  
m2  
m3  
m4  
203  
202  
rm. 2  
backlight  
dim  
toggles vfd brightness  
programmable  
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Custom Code: 1AE5h  
Code Type: NEC  
Carrier Frequency: 38kHz  
Buttons  
main  
DVD  
Function: CD  
Code  
Function: Tuner  
selects 880 codes  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
1
Code  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
selects 880 codes  
195  
135  
134  
136  
131  
132  
133  
137  
6
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles cd power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
programmable  
skip ahead  
VCR  
CD  
vid 1  
vid 2  
vid 3  
tuner  
power  
tape  
aux  
138  
139  
130  
223  
213  
209  
mute  
d.range  
Vol  
Vol  
0
1
skip back  
programmable  
play  
select  
5
play  
programmable  
pause  
menu  
14  
4
pause  
stop  
stop  
track 1  
16  
17  
18  
19  
20  
21  
22  
23  
24  
26  
25  
144  
145  
146  
147  
148  
149  
150  
151  
152  
154  
153  
210  
1
track 2  
2
2
track 3  
3
3
track 4  
4
4
track 5  
5
5
track 6  
6
6
track 7  
7
7
track 8  
8
8
track 9  
9
9
track 10  
0
0
plus 10  
+10  
+10  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
random  
direct tune entry  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
select tuner & toggle am/fm  
tuner memory set  
selects presets/tune  
tuner down  
enter  
7.1m2  
Dolby  
DTS  
stereo  
DVD-A  
SACD  
2-ch  
78  
73  
random  
repeat  
ch.trim/AM/FM  
ch. cal / mem  
th-eq / p.scan  
tone / tune  
bypass / tune  
m1  
repeat  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
backlight  
143  
11  
211  
141  
140  
2
69  
196  
198  
tuner up  
rds  
pty  
display  
sleep  
programmable  
backlight  
programmable  
m2  
m3  
m4  
rm. 2  
backlight  
dim  
programmable  
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Custom Code: 1AE5h  
Code Type: NEC  
Carrier Frequency: 38kHz  
Buttons  
main  
DVD  
Function: VCR  
Code  
Function: Video 1  
selects 880 codes  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
Code  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
selects 880 codes  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
VCR  
CD  
vid 1  
vid 2  
vid 3  
tuner  
power  
tape  
aux  
mute  
d.range  
Vol  
Vol  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
select  
programmable  
programmable  
play  
programmable  
programmable  
menu  
programmable  
programmable  
pause  
programmable  
programmable  
stop  
programmable  
programmable  
1
programmable  
programmable  
2
programmable  
programmable  
3
programmable  
programmable  
4
programmable  
programmable  
5
programmable  
programmable  
6
programmable  
programmable  
7
programmable  
programmable  
8
programmable  
programmable  
9
programmable  
programmable  
0
programmable  
programmable  
+10  
programmable  
programmable  
enter  
programmable  
programmable  
7.1m2  
Dolby  
programmable  
programmable  
programmable  
programmable  
DTS  
programmable  
programmable  
stereo  
DVD-A  
SACD  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
2-ch  
programmable  
programmable  
random  
repeat  
ch.trim/AM/FM  
ch. cal / mem  
th-eq / p.scan  
tone / tune  
bypass / tune  
m1  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
m2  
programmable  
programmable  
m3  
programmable  
programmable  
m4  
programmable  
programmable  
rm. 2  
backlight  
backlight  
backlight  
dim  
programmable  
programmable  
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Custom Code: 1AE5h  
Code Type: NEC  
Carrier Frequency: 38kHz  
Buttons  
main  
DVD  
Function: Video 2  
Code  
Vunction: Video 3  
selects 880 codes  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
Code  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
selects 880 codes  
195  
135  
134  
136  
131  
132  
133  
137  
128  
138  
139  
130  
223  
213  
209  
selects 880 dvd input  
selects 880 vcr input  
selects 880 cd input  
selects 880 video 1 input  
selects 880 video 2 input  
selects 880 video 3 input  
selects 880 tuner  
toggles 880 power on/off  
selects 880 tape input  
selects 880 aux input  
toggles 880 audio mute  
toggles 880 night mode  
880 master volume up  
880 master volumer dn  
programmable  
VCR  
CD  
vid 1  
vid 2  
vid 3  
tuner  
power  
tape  
aux  
mute  
d.range  
Vol  
Vol  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
select  
programmable  
programmable  
play  
programmable  
programmable  
menu  
programmable  
programmable  
pause  
programmable  
programmable  
stop  
programmable  
programmable  
1
programmable  
programmable  
2
programmable  
programmable  
3
programmable  
programmable  
4
programmable  
programmable  
5
programmable  
programmable  
6
programmable  
programmable  
7
programmable  
programmable  
8
programmable  
programmable  
9
programmable  
programmable  
0
programmable  
programmable  
+10  
programmable  
programmable  
enter  
programmable  
programmable  
7.1m2  
Dolby  
programmable  
programmable  
programmable  
programmable  
DTS  
programmable  
programmable  
stereo  
DVD-A  
SACD  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
2-ch  
programmable  
programmable  
random  
repeat  
ch.trim/AM/FM  
ch. cal / mem  
th-eq / p.scan  
tone / tune  
bypass / tune  
m1  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
programmable  
m2  
programmable  
programmable  
m3  
programmable  
programmable  
m4  
programmable  
programmable  
rm. 2  
backlight  
backlight  
backlight  
dim  
programmable  
programmable  
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Buttons  
Function:  
Notes  
Data Code  
Macro 1  
Macro 2  
Macro 3  
Macro 4  
Function:  
Function:  
Function:  
Function:  
Notes  
Notes  
Notes  
Notes  
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the appropriate source selector button. For example, if  
you’re teaching your ADCOM remote commands for your  
video 1 source, press the vid 1 source selector first. You  
can “teach” your remote new commands for any function  
button (except backlight) after you’ve selected DVD, VCR,  
CD, vid 1, vid 2, vid 3 and tuner.  
2.5 Programming the GRC-810 Remote  
As you’ve already seen, the GRC-810 is pre programmed  
to control ADCOM’s GTP-880 tuner preamp and the GCD-  
750 CD and GDV-850 DVD players. In addition, it has seven  
“component memory banks” available so you can program  
the remote to learn commands for your DVD player, satel-  
lite box, laser disc player, VCR, etc. This lets you use one  
remote controller for your entire system.  
1. Place the source component’s remote “head to head”  
with the ADCOM remote. They should be in line with each  
other about 2 to 3 inches apart.  
Using Pre Programmed Commands  
Using the remote controller’s pre programmed commands  
is simple. For most GTP-880 functions (volume up/down,  
changing surround modes, etc.), follow these easy steps.  
2. Press the ADCOM remote’s appropriate source selector  
and select buttons simultaneously. Hold both buttons until  
the status LED turns orange and the source selector but-  
ton glows red. Both indicators should remain lit.  
1. Press the main source selector button. This tells the remote  
that you want to use GTP-880 pre programmed commands.  
The main button will flash red to tell you it understands.  
3. Decide which function button on the ADCOM remote  
you want to learn a new command. Press it. The orange  
status LED will begin to flash and the source selector LED  
will go out.  
2. Press the appropriate function button (volume up, volume  
down, etc.) If you’ve selected a button that actually triggers  
a GTP-880 command, the main button will again flash red  
to confirm your choice. If the main button does not flash,  
you’ve selected a function button that isn’t pre programmed.  
4. Find the corresponding button on the source compo-  
nent’s remote. Press and hold it until the status LED on  
the ADCOM remote flashes green once and remains green  
until the button on the source remote is released. Once  
the button on the source remote is released, the status  
LED will start flashing orange again.  
For tuner functions (changing stations, etc.):  
1. Press the tuner source selector button. It will flash red.  
2. Press the tuning up (or tuning down) function button  
to change stations. The tuner source selector will flash  
red to confirm that the function button you’ve selected  
actually triggers a command. (Again, use the table to see  
which buttons are pre programmed.) Press the CD source  
selector first to access pre programmed commands for  
ADCOM CD players.  
5. Verify that the ADCOM remote has learned the new  
command by pressing and holding the same button on the  
source remote. The ADCOM remote’s status LED should  
flash green twice and then go back to steady orange. This  
indicates successful programming. Release the button on  
the source remote.  
Repeat steps 3 through 5 for any other commands you want  
to teach your ADCOM remote for that source component.  
Note: You can program new commands over the pre pro-  
grammed commands in tuner and CD if you wish. However,  
you cannot program any buttons, even those unpro-  
grammed with GTP-880 command codes, while you’re in  
main mode. This safety feature assures you that you will  
always be able to fully enjoy the GTP-880’s capabilities.  
Save the commands you’ve just programmed into the  
ADCOM remote by pressing and holding the appropriate  
source selector and select buttons simultaneously. Hold  
until the status LED and source selector LED flash twice  
and then go out. Repeat these steps for any other source  
commands you wish to program.  
Programming Your Own Commands  
You can supplement pre programmed commands with com-  
mands to operate other components. Before you begin to  
follow these steps, note the status LED located at the top  
left corner just above the remote’s button panel: It will  
flash red, orange, or green to signal particular functions as  
you enter new commands into your ADCOM remote.  
Begin by deciding which source component’s commands  
you will be transferring to the ADCOM remote. Then press  
Deleting Individual Commands  
1. Press the ADCOM remote’s source selector and select  
buttons simultaneously and hold until the orange status  
LED and the source selector button glow steadily.  
2. Press the function button you wish to clear. The status  
LED will flash continuously.  
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3. Press the backlight button. The status LED will then  
flash green twice and then revert to steady orange. The  
source selector button will continue to glow.  
store and transmit either of two complete macros, depend-  
ing on which source selector is active when you push it.  
For macro programming purposes, think of the source  
selectors as being in two groups: main, DVD, VCR, and CD  
in group 1; vid 1, vid 2, vid 3, and tuner in group 2. When  
you program a “group 1” macro, you will start by push-  
ing the main source selector. After you’ve completed and  
memorized that macro command series, you can  
Repeat steps 2 and 3 for any other command you wish to  
delete for the same source component.  
4. Exit “delete mode” by pressing and holding the source  
selector and select buttons simultaneously. The orange  
status LED and the source selector button will turn off.  
initiate it whenever you’re in main, DVD, VCR or CD  
modes. Similarly, you will program “group 2” macros by  
pushing vid 1 first and can use them whenever the video  
1, video 2, video 3, or tuner inputs are active.  
Deleting all the Programmed  
Commands for one Source Component  
1. Press the ADCOM remote’s source selector and select  
buttons simultaneously and hold until the orange status  
LED and the source selector button turn on and remain lit.  
1. Press either the group 1 or group 2 source selector  
button (main or vid 1 respectively) and the mute button  
simultaneously. Hold both buttons until the red status LED  
and the input selector button remain lighted.  
2. Press and hold down the backlight button. The red sta-  
tus LED and the device button will flash five times, the  
status LED will then flash green twice and turn to a con-  
stant orange, indicating that all the learned information  
for the device mode selected has been erased.  
2. Press the macro initiator button (m1, m2, m3 or m4)  
you wish to program.  
3. Select and press up to ten buttons you wish to store  
in the macro. Both source selector and function but-  
tons count as individual commands. Remember that each  
macro can hold only up to ten individual commands.  
3. To exit this feature, press and hold the ADCOM remote’s  
source selector and select buttons simultaneously. The  
orange status LED and the source selector button will  
flash twice and then turn off.  
4. Press the random button to save the macro. The red  
status LED and input selector button will blink twice to  
confirm programming and then turn off.  
Deleting all the Commands for Every  
Source Component  
To add a power (on/off) command to the macro, use the  
mute button in place of the power button.  
Note: This procedure erases every programmed command  
accessed under the selected DVD, VCR, CD, vid 1, vid  
2, vid 3, and tuner input selectors. Make sure you really  
want to do this before following the step below.  
• The random/tone buttons cannot be used in a  
macro sequence.  
Press and hold the video two input selector and the back-  
light button simultaneously. The red status LED will flash  
twelve times. The status LED will then flash green once,  
followed by a single orange pulse.  
Deleting Macro Initiator Buttons:  
1. Press either the group 1 or group 2 source selector  
button (main or vid 1 respectively) and the mute button  
simultaneously. Hold both buttons until the red status LED  
and the input selector button remain lighted.  
All LEDs will then turn off, indicating that every learned  
command in the ADCOM remote has been erased.  
2. Press the macro initiator button (m1, m2, m3 or m4)  
you wish to delete.  
2.6 Programming Macro Buttons  
“Macro” commands are simply a series of individual  
commands initiated by pushing just one button.  
3. Press the random button. The red status LED and input  
selector button will blink twice to confirm deletion of  
the macro.  
The ADCOM remote can learn up to 10 individual  
commands and store them as a single macro.  
There are four “macro initiator” buttons on the ADCOM  
remote: m1, m2, m3, and m4. Each “macro initiator” can  
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2.7 Function and Data List for GTP-880 (Discrete) Remote Control via IR  
Custom Code: 1AE8h  
Code Type: NEC2  
Carrier Frequency: 38kHz  
Command  
pwr on  
GTP-880 Function  
IR: D7~D0 Hex Deci Turnon  
turns power full on  
0101 0100 54h  
0101 0101 55h  
1100 1011 CBh  
1101 0111 D7h  
1001 0000 90h  
1001 1000 98h  
1001 0001 91h  
1100 1101 CDh  
1001 0010 92h  
1001 0011 93h  
1101 0000 D0h  
1101 0001 D1h  
1101 0010 D2h  
1101 0011 D3h  
0001 0100 14h  
0001 0101 15h  
0001 0110 16h  
0001 0111 17h  
0101 0110 56h  
0101 0111 57h  
1100 1110 CEh  
1100 1111 CFh  
1101 0101 D5h  
1101 0110 D6h  
0101 0010 52h  
0101 0011 53h  
1000 1011 8Bh  
1100 1000 C8h  
0101 1100 5Ch  
0101 1101 5Dh  
0000 1110 0Eh  
0101 1110 5Eh  
0101 1111 5Fh  
0100 1110 4Eh  
0100 1111 4Fh  
0000 1100 0Ch  
0000 1101 0Dh  
0000 1111 0Fh  
0100 1100 4Ch  
1100 1001 C9h  
1100 1010 CAh  
0001 1000 18h  
0001 1001 19h  
0001 1010 1Ah  
0001 1011 1Bh  
0101 1000 58h  
0101 1001 59h  
0101 1010 5Ah  
0101 1011 5Bh  
84  
85  
yes  
pwr off  
dvd-a on  
dvd-a off  
sacd on  
sacd off  
2 channel on  
2 channel off  
otp1  
opt2  
opt3  
coax1  
coax2  
turns power off (standby)  
direct selection of dvd-a analog direct input  
direct de-selection of dvd-a analog direct input  
direct selection of sacd analog direct input  
direct de-selection of sacd analog direct input  
direct selection of stereo bypass mode  
direct de-selection of stereo bypass mode  
direct select digital input opt 1  
direct select digital input opt 2  
direct select digital input opt 3  
direct select digital input coax 1  
direct select digital input coax 2  
direct select digital input coax 3  
direct select fm mode monophonic  
direct select fm mode stereophonic  
turns on tone bypass function  
turns off tone bypass function  
mutes main audio  
203  
215  
144  
152  
145  
205  
146  
147  
208  
209  
210  
211  
20  
coax3  
fm-mono  
fm-stereo  
bypass-on  
bypass-off  
mute-on  
mute-off  
room2-on  
room2-off  
mute2-on  
mute2-off  
room2 vol +  
room2 vol -  
t.comp-on  
t.comp-off  
plII-c  
plII-m  
dolby pl  
neo:6c  
neo:6m  
5ch stereo  
7ch stereo  
dolby d  
dolby ex  
dts  
21  
22  
23  
86  
unmutes main audio  
87  
direct select room 2 audio on  
direct select room 2 audio off  
mutes room 2 audio  
unmutes room 2 audio  
room 2 volume up  
206  
207  
213  
214  
82  
room 2 volume down  
83  
direct select theater compensation on  
direct select theater compensation off  
direct select pro logic II cinema  
direct select pro logic II music  
direct select pro logic emulation  
direct select dts neo:6 cinema  
direct select dts neo:6 music  
direct select 5 channel stereo  
direct select 7 channel stereo  
direct select dolby digital  
direct select dolby digital surround ex  
direct select dts  
direct select dts extended surround  
direct select tuner am frequency band  
direct select tuner fm frequency band  
direct select tuner preset 1  
direct select tuner preset 2  
direct select tuner preset 3  
direct select tuner preset 4  
direct select tuner preset 5  
direct select tuner preset 6  
direct select tuner preset 7  
direct select tuner preset 8  
139  
200  
92  
93  
14  
94  
95  
78  
79  
12  
13  
15  
76  
201  
202  
24  
25  
26  
dts-es  
am  
fm  
yes  
yes  
yes  
yes  
yes  
yes  
yes  
yes  
yes  
yes  
preset1  
preset2  
preset3  
preset4  
preset5  
preset6  
preset7  
preset8  
27  
88  
89  
90  
91  
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Custom Code: 1AE8h  
Code Type: NEC2  
Carrier Frequency: 38kHz  
Commandfront GTP-880 Function  
IR:D7~D0 Hex Deci Turnon  
distance +  
increase distance to front speakers (affects delay delta) 0000 0000 00h  
decrease distance to front speakers (affects delay delta) 0000 0001 01h  
increase distance to center speakers (affects delay delta) 0000 0010 02h  
decrease distance to center speakers (affects delay delta) 0000 0011 03h  
0
front distance -  
center distance +  
center distance -  
surr rear distance +  
surr rear distance -  
surr back distance +  
surr back distance -  
sub distance +  
sub distance -  
distance unit  
center trim +  
center trim -  
rear l trim +  
rear l trim -  
rear r trim +  
rear r trim -  
sub trim +  
1
2
3
increase distance to surround speakers  
decrease distance to surround speakers  
increase distance to surround speakers  
decrease distance to surround speakers  
increase distance to subwoofer (affects delay delta)  
increase distance to subwoofer (affects delay delta)  
toggles feet/meter  
(affects delay delta)  
(affects delay delta)  
(affects delay delta)  
(affects delay delta)  
0100 0000 40h  
0100 0001 41h  
1101 1010 DAh  
1101 1011 DBh  
1101 1000 D8h  
1101 1001 D9h  
0100 0101 45h  
0000 1000 08h  
0000 1001 09h  
0000 1010 0Ah  
0000 1011 0Bh  
0100 1000 48h  
0100 1001 49h  
0100 1010 4Ah  
0100 1011 4Bh  
0001 1100 1Ch  
0001 1101 1Dh  
0001 1110 1Eh  
0001 1111 1Fh  
1101 0100 D4h  
0100 0111 47h  
0100 0110 46h  
0100 0011 43h  
0100 0010 42h  
0001 0001 11h  
0001 0000 10h  
0001 0011 13h  
1000 1100 8Ch  
1000 1101 8Dh  
1000 1110 8Eh  
0101 0000 50h  
0101 0001 51h  
0001 0010 12h  
1000 1111 8Fh  
1100 1100 CCh  
1000 0111 87h  
1100 0100 C4h  
1100 0101 C5h  
1100 0110 C6h  
1100 0111 C7h  
1001 0100 94h  
1001 0101 95h  
1001 0110 96h  
1001 0111 97h  
1000 0110 86h  
64  
65  
218  
219  
216  
217  
69  
8
9
10  
11  
72  
73  
74  
75  
28  
29  
30  
31  
212  
71  
70  
67  
66  
17  
16  
19  
140  
141  
142  
80  
81  
18  
143  
204  
135  
196  
197  
198  
199  
148  
149  
150  
151  
134  
adjust center channel level up  
adjust center channel level down  
adjust rear left channel level up  
adjust rear left channel level down  
adjust rear right channel level up  
adjust rear right channel level down  
adjust subwoofer channel level up  
adjust subwoofer channel level down  
adjust back left channel level up  
adjust back left channel level down  
adjust back right channel level up  
adjust back right channel level down  
direct select dynamic range no comp  
direct select dynamic rnage comp 25%  
direct select dynamic range comp 50%  
direct select dynamic range comp 75%  
direct select dynamic range comp 100%  
direct select dvd audio for room 2  
direct select vcr audio for room 2  
direct select cd audio for room 2  
direct select video 1 audio for room 2  
direct select video 2 audio for room 2  
direct select video 3 audio for room 2  
direct select tuner audio for room 2  
direct select tape audio for room 2  
direct select aux audio for room 2  
direct select 7.1m2 processing on  
direct select 7.1m2 processing off  
adjust bass up  
sub trim -  
back l trim +  
back l trim -  
back r trim +  
back r trim -  
d.range 0  
d.range 25  
d.range 50  
d.range 75  
d.range 100  
room2 dvd  
room2 vcr  
room2 cd  
room2 video 1  
room2 video 2  
room2 video 3  
room2 tuner  
room2 tape  
room2 aux  
7.1m2 on  
7.1m2 off  
bass +  
bass -  
adjust bass down  
treble +  
adjust treble up  
treble -  
adjust treble down  
tone reset  
resets bass & treble to 0  
stereo  
direct select stereo mode  
unused  
unused  
unused  
unused  
unused  
unused  
factory defaults  
resets all to factory defaults settings  
ADCOM GTP-880 Owner’s Manual | 35  
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To use the GTP-880 menu system:  
3.1 Setup Overview  
1. Press the main menu button to display the main menu.  
The main menu appears on the OSD:  
At this point you should have made all the necessary  
physical connections between the GTP-880 and your  
source equipment, amplifiers and speakers. All that  
remains is to properly configure the system to reflect your  
specific equipment and room characteristics.  
To turn the GTP-880 on:  
1. Plug the cord into an AC wall outlet or UL approved  
power strip or surge protection device.  
Make certain that the AC power cord supplied with the  
GTP-880 is firmly inserted into the socket on the unit’s  
rear panel.  
2. Press or followed by the select button to select a  
setup menu. Your selection appears on the OSD:  
2. Press the rear panel power switch to the on position to  
set the GTP-880 to standby mode.  
3. Press or to select an item to adjust. Your selection  
appears on the front panel display and the OSD:  
The standby indicator on the front panel will light up.  
4. Press or to select or adjust a setting.  
3. Press the front panel standby power button to turn on  
the GTP-880 or press the power button on the remote  
control.  
Once you have made your selections, you can use the  
and to return to the main menu and/or exit the menu  
system. Alternatively, pressing the menu button once will  
return you to the main menu. Pressing the menu button  
a second time will exit the menu system. Note that the  
menus will remain visible on the front panel and OSD until  
you exit the menu system.  
The front panel display will light up and the standby  
indicator will turn red.  
3.2 On Screen Display  
Setup of the GTP-880 is performed by using the remote  
control. Information is shown on the front panel display, or  
the on screen display (OSD). All selections are made using  
a combination of the following buttons:  
Important Note: When viewing static images such as on  
screen menus or video game images using a CRT-based  
projector, plasma display or direct-view CRT monitor or  
television, there is a risk of permanently “burning in”  
the image. Do not leave these images on for an extended  
period of time. This type of damage is not covered by the  
ADCOM GTP-880 warranty.  
3.3 Input Configuration  
Before calibrating your GTP-880 and adjusting loudspeaker  
setup and configuration, you should first set up the sources  
connected to it. You will make your selections using the  
input configuration menu, shown below.  
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To configure an input:  
PLII-C, PLII-M, Dolby PL, 7 stereo, 5 stereo, stereo, NEO:  
6-C, NEO:6-M, Dolby, Dolby EX, DTS, DTS-ES  
1. Press the menu button to enter the main menu. The  
main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu and input config appears on the front  
panel display.  
You can scroll in either direction using the < and > buttons.  
You should choose a surround mode to be the default for this  
source. Remember that all available mode options can be  
selected for a digital input source, but certain modes will  
not be available through the analog input for that source.  
2. Press select to enter the input configuration menu. The  
input configuration menu appears on the front panel display  
and the OSD. The selected menu item should be source.  
Selecting the default mode will not exclude other modes  
of surround decoding. In fact, certain digital signals (Dolby  
Digital, DTS, some Dolby Digital EX, and others) contain a  
special digital “flag” that tells the GTP-880 to switch to  
that surround mode. When the GTP-880 receives one of  
3. Use the and buttons to select which particular  
Source you wish to configure. The Source choices appear  
as follows as you scroll through them:  
DVD, video1, video2, video3, VCR, tuner FM, tuner AM, CD, these bitstreams it will switch to that mode of operation.  
TAPE, and AUX  
Additionally, you can manually cycle through the available  
modes while the source is playing to choose the one you  
wish to use.  
You can scroll in either direction using the < and > buttons.  
4. Press the button once to select the Input menu.  
3.4 Speaker Configuration  
5. Use the and buttons to select an Input for that  
source. The input choices appear as follows as you scroll  
through them:  
You are now ready to configure the GTP-880 for your  
particular loudspeaker system. Before proceeding please  
read the following information carefully:  
ANALOG, OPTICAL 1, OPTICAL 2, OPTICAL 3, COAXIAL 1,  
COAXIAL 2, COAXIAL 3  
You can scroll in either direction using the < and > buttons.  
If you connected the source to theAnalog inputs, select: analog.  
If you connected the source to one of the optical digital  
inputs, select the appropriate one by choosing: optical 1,  
optical 2 or optical 3  
If you connected the source to one of the coaxial digital  
inputs, select the appropriate one by choosing: coaxial 1,  
coaxial 2 or coaxial 3.  
Note: Always connect and configure the digital input  
source option if one is available from the specific compo-  
nent, as this will provide maximum performance and best  
sound quality.  
This speaker setting is preferred if you are not  
using surround backs.  
Speaker Placement  
The best speaker placement for your particular room will  
depend on its size, furnishings, seating arrangement, the  
acoustical properties of the space, including wall type,  
coverings, and various other factors.  
Remember that you can always return to any menu to  
change your selection, should that be required.  
6. Press the button once to select the Mode menu.  
7. Use the and buttons to select a Mode for that  
source. The available surround modes appear as follows as  
you scroll through them:  
Due to the complex nature of these variables it is impos-  
sible to recommend any one-size-fits-all placement. You  
may well have to experiment with various placement  
options to determine the best configuration for your  
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specific situation. Please note that, the configuration and  
placement of your speakers is critical for creating the best  
possible surround sound playback.  
To configure the GTP-880 for your speaker system:  
1. Press the menu button to enter the main menu. The  
main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu and input config appears on the front  
panel display.  
2. Press the button once to select the speaker  
configuration menu. The cursor on the OSD should be  
pointing to the speaker configuration menu and speaker  
config appears on the front panel display.  
3. Press select to enter the speaker configuration menu.  
The speaker configuration menu appears on the front  
panel display and the OSD. The selected menu item  
should be front.  
This is the preferred speaker setting if you are using  
surround backs.  
The first three settings in the speaker configuration menu  
deal with the type of speakers you are using in your sys-  
tem. It is very important that you understand what is  
meant by the large and small settings in this menu. They  
do not refer to the physical size of the speakers, but to  
their ability to handle very powerful deep bass. Most  
loudspeaker systems on the market should be classified  
as small, since they do not have the capability to handle  
the often extraordinary amount of deep bass content film  
soundtracks can contain.  
This speaker setting is preferred if you are using dipoles  
for your surround rears.  
It is strongly recommended that you consult your loud-  
speaker instruction manual regarding the capabilities of  
your particular system with regard to low bass/low fre-  
quency reproduction.  
Note: If space permits, install surrounds  
2-3 feet above viewers. This helps to  
minimize localization effects.  
In any case you should consider using a subwoofer for any  
system which you expect to effectively handle the low  
frequency dynamics of modern motion picture soundtrack  
sources such as DVD or HDTV feeds, and many other dis-  
crete multichannel programming sources.  
If you aren’t sure about your speaker’s real world capabili-  
ties and you are using a subwoofer, choose small, since  
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this will insure that all the appropriate low frequency  
information is directed to the subwoofer where it can be  
most effectively handled.  
9. Press the button to select the return to main  
menu option.  
10. Press select or menu to return to the main menu, or  
press the menu button twice to exit the menu system.  
4. Use the and buttons to cycle through the speaker  
options for the front speaker. The following options are  
available for each group of loudspeakers:  
3.5 Channel Configuration: Calibration  
The next step is to adjust the output level of each channel  
so that they are properly matched. This must be done  
to insure a correct presentation of multichannel sound  
sources. The adjustment must be as precise as possible,  
and is almost impossible to accomplish by ear. Therefore,  
we recommend that you use a sound level meter. This  
device insures that all loudspeaker levels are precisely  
matched and set accurately. (The Radio Shack analog sound  
level meter is inexpensive and suitable for this task.)  
For front you can select small or large  
For center you can select small, large or none  
For surr(ounds) you can select small, large or none  
For surr(ounds) rear you can select BS(LB), LB/RB or  
none. LB/RB means you have a left back and right back  
rear surround speaker setup for use in a 7.1 configuration.  
BS(LB) means you have a single centrally placed back sur-  
round speaker for use in a 6.1 (EX) type configuration.  
Set the meter to slow response and “C” weighting. Set it  
to the 70 or 80dB sensitivity scale. Position the meter at  
the approximate center of your listening area, at average  
ear height [approximately 40-46 inches (102-117 cm)] with  
its microphone positioned vertically (pointing at the ceil-  
ing). Don’t aim the microphone at the speakers, as this  
will produce inaccurate results.  
For subwoofer you can select on or off  
5. Press the button when you have made a selection.  
Repeat steps 4 and 5 until you have completed selecting  
the speaker type for each loudspeaker in your system.  
6. Press the button when you are finished to select  
the front crossover (xover) menu. The front, center and  
surround crossover menus are used to independently set  
the internal high pass filter of the GTP-880’s crossover for  
each of these three speaker groups.  
To proceed with the adjustments, you will access the  
channel calibration menu shown below.  
To set the channel levels for you system:  
With no source playing, set the volume level of the  
GTP-880, using the main volume control, to 0dB.  
7. Use the and buttons to adjust the front crossover.  
The crossover settings appear as follows as you scroll  
through them: 40Hz, 60Hz, 80Hz, 100Hz, 120Hz, 150Hz  
Note: None will appear for a large speaker setting.  
You can scroll in either direction using the and buttons.  
Consult the material that came with your loudspeakers to  
determine the correct settings, if any are recommended.  
If you are not sure about the frequency response of your  
speakers, we recommend you set the crossover at 80Hz,  
unless otherwise directed by the manufacturer. If you are  
using very small satellite speakers you may need to set  
the crossovers to 100 or even 120Hz. When correctly set,  
you should hear a smooth transition of lower to upper bass  
between the satellites and the subwoofer.  
1. Press the menu button to enter the main menu. The  
main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu and input config appears on the front  
panel display.  
2. Press the button until the channel calibration menu is  
selected. The cursor on the OSD should be pointing to the  
channel calibration menu and channel calib appears on the  
front panel display.  
8. Press the button when you have made a selection.  
Repeat steps 7 and 8 until you have completed the speaker  
crossover settings for each group of speakers.  
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3. Press select to enter the channel calibration menu.  
The channel calibration menu appears on the front panel  
display and the OSD. The selected menu item should be  
left front.  
the volume for a few seconds. The unit will then resume  
cycling the test tone from speaker to speaker, until you  
touch the ch. cal button again.  
Note: Speakers that you selected “none” for in the  
A special test tone will be generated allowing you to  
measure the output of the speaker that’s playing. Adjust  
the master volume as needed.  
speaker config menu will not appear.  
3. Press the ch. cal button on the remote control again to  
exit the test tone function.  
4. Use the and buttons to adjust the speaker level.  
You can adjust the selected channel level in 1dB steps  
across a range of -15dB to +10dB.  
Channel Trim  
Channel trim allows you to fine tune the channel levels  
to compensate for various soundtrack anomalies. For  
example, you may play a movie and find that the center  
(dialogue) channel is weak, making the movie hard to  
follow. Simply trimming the center channel up a dB  
or two can fix the problem. Or another film may have  
substantially more bass than normal and trimming the  
subwoofer channel down a dB or two may help balance  
the sound correctly.  
5. Press the button when you have finished making the left  
front level adjustment. Repeat steps 5 and 6 until you have  
completed setting the level for each speaker in your system.  
6. When you have finished adjusting the level for all the  
speakers in your system, press the button to select the  
return to main menu option.  
7. Press the select or menu button to return to the main  
menu, or press the menu button twice to exit. You can  
also perform this calibration at any time by using the built  
in test tone, by pressing the ch. cal button on the GTP-880  
remote control.  
This function can be accessed in two ways. You can press  
the ch. trim button on the remote control, or you can  
access this feature through the main menu. The channel  
trim menu is shown below.  
To set channel levels using the test tone function:  
1. Press the ch. cal button on the remote (make sure to  
press the main button first). This will produce a display  
that shows:  
To adjust channel trim from the main menu:  
1. While playing the program material with output that  
you wish to fine tune, press the menu button to enter the  
main menu.  
When you select this function, the GTP-880’s test tone  
will automatically cycle every few seconds through all the  
speakers you have told the GTP-880 are connected to the  
system. The unit cycles through the speakers in the  
following sequence:  
The main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu and input config appears on the front  
panel display.  
left front, center front, right front, right surr(ound), right  
back (surround), left back (surround), left surr(ound),  
subwoofer  
2. Press the button until the channel trim menu is  
selected. The cursor on the OSD should be pointing to the  
channel trim menu and channel trim appears on the front  
panel display.  
2. Use the and buttons to adjust the speaker level.  
You can adjust the selected channel level in 1dB steps  
across a range of -15dB to +10dB.  
While you are adjusting each speaker, the test tone will  
remain on that channel until you have stopped changing  
3. Press select to enter the channel trim menu. The  
channel trim menu appears on the front panel display and  
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the OSD. The selected menu item should be left front.  
3.6 Delay Configuration  
Setting the speaker delay is crucial to the proper perfor-  
mance of any surround decoder component like the GTP-  
880. Your home theater system will not perform properly if  
this process is not completed.  
4. Use the and buttons to adjust the channel trim.  
You can adjust the selected channel trim level in 1dB steps  
across a range of -15dB to +10dB.  
5. Press the button when you have finished making the  
channel trim adjustment. If necessary, repeat steps 4  
and 5 until you have completed setting the level for each  
speaker in your system.  
To accomplish this process you will need a tape measure or  
other means of determining the distance of each speaker  
from the primary listening position.  
6. Press the button when you have finished making the  
channel trim adjustment to all the speakers in your system  
to select the return to main menu option.  
7. Press the select or menu button to return to the main  
menu, or press the menu button twice to exit.  
To adjust channel trim using the trim function:  
1. Press the ch. trim button on the front panel or the  
remote control. The front panel display and the OSD will  
show the following:  
To set the speaker distance delays for your speakers:  
1. Press the menu button to enter the main menu. The  
main menu appears the OSD. The cursor on the OSD should  
be pointing to the input configuration menu.  
2. Press the button until the delay configuration menu is  
selected.  
2. Use the and buttons to adjust the channel trim  
level. You can adjust the selected channel level in 1dB  
steps across a range of -15dB to +10dB.  
3. Press select to enter the delay configuration menu.  
The delay configuration menu appears on the front panel  
display and the OSD. The selected menu item should be  
front L/R delay.  
3. When you are finished adjusting the channel trim for  
the selected speaker, press trim again to cycle to the  
next channel. The unit cycles through the speakers in the  
following sequence:  
Before setting the speaker distances, you need to choose  
what unit of distance you will be using.  
4. Press the button repeatedly until the distance unit  
menu is selected.  
left front, center front, right front, right surr, right back  
(surround), left back (surround), left surr, subwoofer  
5. Use the and buttons to select between feet and  
meters.  
If necessary, repeat steps 2 and 3 until you have adjusted  
the channel trim of all the speakers in your system.  
6. Press the button repeatedly until you return to the  
front distance menu. To set the distance for each group  
speakers in your system, you will need to measure, the  
distances from your chosen listening/viewing position to  
the various loudspeakers in your system.  
4. Press the ch. trim button on the remote control again to  
exit the channel trim function.  
Remember to return any channel(s) that you have trimmed  
back to the original setting when you are done watching  
the particular program. If you find you are continually  
trimming the same channel(s) by the same amount for  
every film, you might want to consider re-calibrating the  
speaker levels as shown in the section, “channel calibra-  
tion”. Set the levels for the channel(s) up or down by the  
amount you normally trim them.  
Set the distance for the front L/R speakers to the nearest  
foot/meter. Rounding up is OK. Distances can be set in the  
following increments:  
Feet 0 to 20 feet in 1 foot increments.  
Meters 0 to 6 meters in 0.3 meter increments.  
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You can scroll in either direction using the and buttons.  
Setting the OSD Time Out  
This menu is used to set how long the on screen display  
will remain visible after a button is pushed or setting is  
changed on the GTP-880.  
7. Press the button when you have made a selection.  
Repeat steps 6 and 7 for the center and surround speakers.  
NOTE: There is no delay function for the subwoofer  
To set the on screen display time out:  
8. Press the button until the return to main menu option  
is selected.  
1. Press the menu button to enter the main menu. The  
main menu appears on the OSD. The cursor on the OSD  
should be pointing to the input configuration menu.  
9. Press the menu button to return to the main menu, or  
press the menu button twice to exit.  
2. Press the button until system configuration is  
selected. The cursor on the OSD should be pointing to the  
system configuration menu and system config appears on  
the front panel display.  
3.7 System Configuration  
Setting the Display Brightness  
This control sets the front panel display brightness. The  
default display brightness is set to be easily visible in a  
normally lit room. If you prefer to dim the display, for  
example, during movie viewing in a darkened room, you  
can access the VFD brightness setting from the system  
configuration menu.  
3. Press the select button to enter the system configuration  
menu. The system configuration menu appears on the front  
panel display and the OSD.  
4. Press the button until the OSD time out menu is selected.  
5. Use the < and > buttons to cycle through the available  
options. The following times appear as you scroll through  
them: 30 sec, 25 sec, 20 sec, 15 sec, 10 sec, 5 sec, 0 sec  
To set the front panel display brightness:  
1. Press the menu button to enter the main menu. The  
Note: Setting the time out to 0 sec. disables the OSD status.  
6. After making your selection, press the button twice  
to exit the main menu.  
Sleep Timer  
This option allows you set how long the unit will remain  
on before automatically shutting off. This mode can be  
accessed using the sleep button on the remote control, or  
from system configuration menu.  
main menu appears on the OSD. The cursor on the OSD  
should be pointing to the input configuration menu and  
input config appears on the front panel display.  
To set the sleep timer from the main menu:  
1. Press the menu button to enter the main menu. The  
main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu andinput config appears on the display.  
2. Press the button until system configuration is  
selected. The cursor on the OSD should be pointing to the  
system configuration menu and system config appears on  
the front panel display.  
2. Press the button until system configuration is  
selected. The cursor on the OSD should be pointing to the  
system configuration menu and system config appears on  
the front panel display.  
3. Press the select button to enter the system  
configuration menu. The system configuration menu  
appears on the OSD. Display bright is selected.  
3. Press the select button to enter the system  
configuration menu. The system configuration menu  
appears on the front panel display and the OSD.  
5. Use the and buttons to choose between full and half.  
6. After making your selection, exit the main menu. The  
dim button can also be used on the remote control.  
4. Press the button until the sleep time set menu is selected.  
5. Use the and buttons to cycle through the available  
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choices. The following times appear as you scroll through them: menu is selected.  
60min, 50min, 40min, 30min, 20min, 10min, 5min, 0min  
5. Use the and buttons to choose between on and off.  
6. After making your selection, exit the menu.  
6. After making your selection, press the menu button  
twice to exit the main menu.  
Theater Compensation  
Theater compensation provides special equalization  
within any of the selected DSP modes. Most theatrical  
soundtracks are mixed on large dubbing stages for play-  
back in large movie theaters. When these soundtracks are  
played back in your home, they may appear to have too  
much treble, sounding harsh and “bright.” Theater com-  
pensation modifies the audio signal to reduce these char-  
acteristics and make the soundtrack reproduction more  
natural sounding.  
To turn on theater compensation using the th-eq button:  
1. Press the th-eq button on the remote control. The front  
panel display and the OSD will show the following:  
2. Press the th-eq button again to toggle the between on  
and off. The theater compensation menu will disappear  
automatically approximately five seconds (a factory  
default, may be changed in OSD time out) after you make  
your selection.  
Dolby Pro Logic II Cinema and DTS-ES NEO:6 Cinema  
include a form of equalization of their own to address the  
same conditions. When using these modes the addition  
of theater compensation may cause excessive reduction  
of the upper frequencies. However, you may wish to  
experiment with different soundtracks to find what sounds  
best to you.  
Theater compensation can be accessed from the main  
menu or the th-eq button on the remote control turns  
theater comp. on/off.  
To turn on Theater compensation from the main menu:  
1. Press the menu button to enter the main menu. The  
main menu appears on the front panel display and the  
OSD. The cursor on the OSD should be pointing to the input  
configuration menu and input config appears on the front  
panel display.  
Important Note: Theater compensation is not recom-  
mended for music modes, as the equalization added is not  
normally needed.  
Analog Level Input and Peak Indicator  
Not all consumer products (CD players, DVD players, etc.) reach  
a 2V RMS output, therefore the analog input level needs to be  
adjusted to meet such requirement before being processed.  
Adjustments are made in 1dB steps from -15dB to +10dB and do  
not affect any of the analog direct inputs.  
2. Press the button until system configuration is  
selected. The cursor on the OSD should be pointing to the  
system configuration menu and system config appears on  
the front panel display.  
Should the input signal overload the analog to digital  
convertor, the word “peak” will start flashing after “anlg  
peak ind:” until the user turns down the input signal via  
the master volume knob or left/right selector (when in the  
system config menu).  
3. Press the select button to enter the system  
configuration menu. The system configuration menu  
appears on the front panel display and the OSD. The  
selected menu item should be display bright.  
3.8 Pro Logic II and NE0:6 Music Config  
The PLII Music parameter menu is used to adjust the  
panorama, dimension and center Width processing options  
when listening to music in the Dolby Pro Logic II surround  
mode. For a description of these options, see the section  
titled “surround format information.” The PLII parameter  
menu is shown on the following page.  
4. Press the button until the theater comp.  
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To adjust the PLII Music Parameters:  
scroll through them:  
1. Press the menu button to enter the main menu. The  
main menu appears on the OSD. The cursor on the OSD  
should be pointing to the input configuration menu and  
input config appears on the front panel display.  
step 0, step 1, step 2, step 3, step 4, step 5, step 6, step 7  
You can scroll in either direction using the and buttons.  
Depending on how the center width control is set, you may  
adjust the apparent placement of the center channel image  
so that it is heard only from the center speaker, so that it  
is blended into the left and right speakers as a phantom  
image, or that it is blended among the front left, center  
and right speakers in varying amounts. As with the other Pro  
Logic II controls, the use of this setting and the degree to  
which it is used is a matter of personal preference.  
9. Center image can also be adjusted.  
2. Press the button until the PLII music parameter menu  
is selected. The cursor on the OSD should be pointing to  
the PLII music parameter menu and PLII music parameter  
appears on the front panel display.  
10. Press the menu button to return to the main menu, or  
press the menu button twice to exit.  
3.9 Room Two Configuration  
This menu controls the setting for your second room and the  
3. Press select to enter the PLII music parameter menu.  
The PLII music parameter menu appears on the front panel  
display and the OSD. The selected menu item should be  
panorama.  
output from the room 2 out jacks on the rear of the GTP-880.  
This function can be accessed in three ways. You can press  
the rm.2 button on the remote control, you can access this  
feature through the Main menu, or from the front panel  
(please refer to the front panel interface overview section in  
this manual for details). The room two menu is shown below.  
4. Use the and buttons to select between on and off.  
When this setting is on, Pro Logic II’s panorama circuits  
will blend an amount of the front channel information into  
the side speakers so that the sound field appears to wrap  
around the front and sides of the soundstage. Experiment  
with a variety of program sources to see if this effect is  
one you prefer.  
5. Press the button to select the dimension menu.  
6. Use the and buttons to cycle through the  
dimension options. The dimension settings appear as  
follows as you scroll through them:  
To adjust the room two settings:  
step 0, step 1, step 2, step 3, step-3, step-2, step-1  
1. Press the menu button to enter the main menu. The  
main menu appears on the OSD. The cursor on the OSD  
should be pointing to the input configuration menu.  
You can scroll in either direction using the and buttons.  
The dimension control uses special circuitry to give the  
impression that the “center” of the sound field is moving  
towards the front or rear of the room. Experiment with a vari-  
ety of program sources to see if this effect is one you prefer.  
Use as much or as little dimension as you feel is needed.  
2. Press the button until the room two menu is selected.  
The cursor on the OSD should be pointing to the room two  
menu and room two appears.  
3. Press select to enter the room two menu. The room two  
menu appears on the front panel display and the OSD. The  
selected menu item should be room two.  
7. Press the button to select the C width menu.  
8. Use the and buttons to cycle through the C width  
options. The C width settings appear as follows as you  
4. Use the and buttons to select whether you want  
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the room two feature on or off. If on is selected, the red  
LED below the word room 2 on/off on the front panel will  
illuminate indicating activation of the second stereo room.  
5. Press the button to select the Input menu.  
2. Press the same button for five (5) seconds to choose  
from among three data format options for digital audio  
sources. The following is shown on the front panel display  
and the OSD:  
6. Use the and buttons to select a stereo analog  
source which signal will be sent through the room 2  
outputs to the second room. The source choices appear as  
follows as you scroll through them:  
Auto is the default setting for this option, and means that  
when the unit detects the special code imbedded within  
certain data streams such as Dolby Digital or DTS it will set  
itself to properly decode that type of incoming signal.  
DVD, video 1, video 2, video 3, VCR, tuner FM, tuner AM,  
CD, TAPE, AUX  
Note: Stereo analog connections must be made from each source  
except tuner.  
3. Use the and buttons to select one of the data  
format options. You can select either Dolby D(igital), DTS,  
or PCM (for Pro Logic II), as the default format. If you do  
this, signals that are not in the selected format won’t be  
recognized. Therefore, we recommend that you leave the  
system in auto mode unless you wish to use the selected  
mode exclusively.  
You can scroll in either direction using the < and > buttons.  
7. Press the button to select the mute menu.  
8. Use the and buttons to select whether the room  
two mute function is on or off.  
9. Press the button to select the volume menu.  
The data format menu will disappear automatically  
10. Use the and buttons to increase or decrease the  
volume level of the signal being sent to the second room.  
The range available is from -80dB to 10dB. Use caution as  
you can set a very high volume level and not be aware of it  
because of the distance between you and the second room.  
approximately 10 seconds after you make your selection.  
Dynamic Range  
Dynamic range is a special feature of Dolby Digital  
that compensates for difficult listening situations by  
compressing the dynamic range of the speaker output. An  
example would be when you are watching a movie with a  
soundtrack that contains very loud passages and you don’t  
want to disturb others in the house.  
11. Press the button to select the return to main menu option.  
12. Press the select or menu button to return to the main  
menu, or press the menu button twice to exit.  
3.10 Additional Options  
Both low-level boost and high-level cut compression inte-  
grated into night mode compensation is only available  
when the surround mode of the selected input source is  
set to Dolby Digital or Dolby Digital EX and downmixing is  
not enabled (i.e. if the source is a 3/2.1 AC-3 stream, the  
system must be configured to have at least a 5.0 speaker  
setup, or greater). When the system is downmixing a  
multichannel AC-3 stream and Night mode compression is  
enabled, the low-level signals may still be boosted, how-  
ever the high-level signals will not be compressed.  
Surround Data Format Lock  
The GTP-880 will automatically set the surround format  
based on the signal it receives from the selected source. To  
avoid the slight delay occasionally encountered in the auto  
select process, you can choose to override the auto data  
format detection circuitry by following the procedure below.  
To enable/disable Night Mode compensation:  
1. Press the d.range button on the remote control. The  
night mode selection appears on the front panel display  
and OSD under the currently selected input source.  
To lock a specific surround mode:  
1. Press the desired surround mode button (Dolby, DTS, or  
stereo) on the remote control repeatedly to cycle through  
the available processing options. Your selection will appear  
on the front panel display and OSD.  
2. Use the and buttons to change the night mode  
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setting. The unit cycles through the options in the  
following sequence:  
In most cases a minimum amount of dynamic range reduc-  
tion is automatically included in the bitstream to ensure  
safe downmixing. However, regardless if the user chooses  
to engage Night mode compression or not, the DSP auto-  
matically ensures safe downmixing regardless of the signal  
encoding.  
no comp, dr comp1, dr comp2, dr comp 3, dr comp4  
Use the and buttons to select a dynamic range option  
you prefer for the Night setting.  
The night mode menu will disappear automatically approx-  
imately 5 seconds (a factory default, may be changed in  
OSD time out) after you make your selection.  
no comp: This option leaves the compression at 0% change.  
dr comp1: This option increases the compression by 25%.  
dr comp2: This option increases the compression by 50%.  
dr comp3: This option increases the compression by 75%.  
dr comp4: This option increases the compression by 100%.  
There are two types of automatic compression control  
built into the Dolby Digital process. Compression makes  
the loud parts softer and the soft parts louder to reduce  
the difference between the two.  
One type of compression is most useful for situations such  
as late night viewing of programs with a wide dynamic  
range (like many action movies) that might disturb oth-  
ers in your home. This function can also be used to pro-  
vide compression for program material that may require  
enhancement of overall intelligibility (such as some older  
soundtracks).  
Each option increases the amount of Dynamic Range com-  
pression to the signal. Depending on your family, neigh-  
bors, circumstances, and the overall volume you wish to  
achieve, we recommend you start with DR COMP1 or DR  
COMP2 as your initial setting. You will have to experiment  
with program material and your personal preferences to  
determine what is acceptable and best for you.  
Another feature provided by this option is the neces-  
sary peak limiting required to avoid signal overload when  
"downmixing" functions are selected.  
Press the button to select the return to main menu option.  
Press the select or menu button to return to the main menu,  
or press the menu button twice to exit the menu system.  
The second variable provides additional peak limiting to  
allow overall average program level to be increased by  
adding even more compression to the signal.  
These two algorithms can provide sufficient overall gain  
reduction to allow even wide dynamic range soundtracks  
with very soft parts and very loud parts to maintain good  
audibility at low volume levels.  
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Installer’s Notes  
This page has been intentionally left blank.  
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the amplifier. If the hum disappears, try another set of  
RCA cables. Connect one RCA cable at a time to see if one  
specific cable is responsible. If any or all cables cause the  
hum to appear, then the preamp or processor should be  
evaluated for proper operation by your dealer or autho-  
rized service center.  
Resolving Problems  
Use the chart on the opposite page to solve common situ-  
ations that don’t require professional attention. If the  
steps stated in possible solution do not resolve your prob-  
lem, then please contact your ADCOM dealer or call the  
ADCOM customer service department. Any problems not  
covered here should be brought to the attention of your  
ADCOM dealer or ADCOM customer service dept.  
System Reset  
In rare cases the GTP-880 internal processor may freeze or  
lock-up causing abnormal operation. This is common to all  
micro-processor controlled devices when the unit is subject  
to excessive static discharge, AC line noise, or power spikes.  
A special note on “hum:” When there is a low-volume  
“hum” audible throughout your speakers, even with the  
main volume turned all the way down, you have a com-  
mon phenomenon known as a “ground loop.” A ground loop  
is basically a difference in ground voltages between two  
or more components which are connected electrically and  
which creates multiple current paths where there must only  
be one. This difference in potentials creates a 60Hz low-  
level sound (approximately a low A), that seems to “hum.”  
In most cases it is easy to solve this problem by simply  
unplugging the GTP-880 from its AC power source for  
about five minutes. After waiting, reconnect the power  
cord and turn the unit on. If the unit functions normally,  
no further action is needed.  
In the event that the unit still does not operate prop-  
erly, it may be necessary to manually reset the proces-  
sor. Note, however, that when the processor is reset you  
will lose all settings including digital audio assignments,  
surround mode settings, speaker configurations, tuner  
presets and any other memory items. For this reason we  
strongly recommend that you record these settings so that  
it is easy to restore them after resetting the processor.  
It can be caused by adding new components to your sys-  
tem, but that does not imply there is anything electri-  
cally wrong with any new component. With the advent  
of audio/video and home theater systems, the problem  
has become commonplace. Generally, the cause is the  
Cable-TV incoming signal line. This new incoming line may  
add an additional ground at a different potential to the  
AC line ground of your other equipment (refer to note I  
and 2, to troubleshoot a hum problem).  
To reset the unit to factory default settings you will need  
to enter the discret remote control command. Please  
refer back to the discrete remote control commands  
table. The command name is “Factory Defaults”, the IR  
code is 86h. This should reset the system.  
Note 1: Cable TV systems can sometimes contribute to  
ground loop problems which cause “hum.” To determine  
if your cable system is the contributing factor, discon-  
nect the Cable-TV incoming signal line (round, 75Ω) at  
the wall, or the first component the cable is connected to  
(i.e. the cable box, or VCR). If the hum is no longer pres-  
ent, you must insert a “75Ω ground loop isolator” before  
reconnecting the line. You should check with your ADCOM  
dealer to obtain one. If the “75Ω ground loop isolator”  
works only partially or not at all, then please read note 2  
to complete the troubleshooting procedure.  
If the manual reset does not solve the problem, contact  
your authorized ADCOM dealer, an authorized ADCOM  
service center or contact ADCOM’s service department  
directly for further advice.  
Note 2: Make sure that the power amplifier is at least  
6” from the GTP-880. Usually putting another compo-  
nent between them is sufficient to minimize the hum. If  
this does not reduce the hum, turn the system off and  
disconnect all Inputs from the amplifier. If the hum still  
persists, then your dealer or service center must examine  
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Symptom  
Possible Reason  
Possible Solution  
No sound  
• Power AC lead unplugged or  
power not switched on  
Tape Monitor selected  
• Mute on  
• Check if AC lead is plugged in  
and power switched on  
• De-select Tape Monitor mode  
• Switch off Mute  
Turn on the Power Amplifier  
• Power Amplifier not on  
No sound on one channel  
• Speaker not properly connected  
or damaged.  
• Input lead disconnected or  
damaged  
• Check connections and speakers  
• Check leads and connections  
• Select appropriate Surround  
mode (large or small)  
• In Setup “OFF” for surround  
speaker selected  
No sound on surround channels  
No sound on center channel  
• No surround mode selected  
• Mono sound source  
• Speakers not properly  
connected  
• Select a Surround Mode  
Test system with stereo or  
Dolby Surround material  
• Check speakers and connections  
• Increase surround volume level  
• Surround volume level too low  
• In Setup “OFF” for center  
speaker selected  
• Select appropriate Center  
mode (large or small)  
• Speaker not connected properly  
• Center volume level set too low  
• Check speaker and connection  
• Increase center volume level  
“Dolby Digital” OR “DTS” auto-  
detection function does not work  
• Source not connected using  
digital input  
• Bit Stream is PCM  
• Connect digital output of source  
to GTP-880  
• Check source material  
Weak bass/diffuse stereo image  
• Speakers wired out of phase  
• Check connections to all  
speakers in the system  
Remote control handset not working  
• Batteries dead, or incorrectly  
inserted  
• Check or replace batteries  
• Remove obstruction  
• IR transmitter or receiver  
windows obstructed  
• Place unit away from direct sun,  
reduce amount of ambient light  
• IR receiver in direct sun or very  
bright ambient light  
No sound with tuner  
• Antenna leads incorrectly  
connected  
• Station not selected or weak  
signal with FM Mute on.  
• Check antenna connections to  
preamplifier  
• Re-tune or switch off FM Mute  
Noise, hiss on AM and FM  
Distortion on FM  
• Weak signal  
• Check station tuning. Adjust or  
replace antenna.  
• Multi-path signals or interfe-  
ence from another station  
• Check station tuning. Adjust or  
replace antenna  
Whistles or buzzes on FM & AM  
• Interference from other  
electrical sources - computers,  
games consoles  
• Check station tuning. Switch off  
or move the source of the  
electrical noise  
Whistles or buzzes on AM  
No RDS name (PS)  
• Interference from fluorescent  
lighting or electrical motor  
• Check station tuning. Adjust or  
replace AM antenna  
• Station signal too weak.  
• Station not transmitting RDS data  
• Check station tuning. Adjust or  
replace antenna  
• No remedy  
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Caring for your GTP-880  
Great care has been taken by ADCOM to ensure that your amplifier is as flawless in appearance as it is electronically.  
The front panel is a heavy-gauge, high-grade aluminum extrusion carefully finished and anodized for durability. The  
chassis, top cover and rear panel are heavy-gauge steel that has been powder coated and baked to ensure a lasting  
finish. If the front panel, top or sides become dusty or fingerprinted, they can be cleaned with a soft lint-free cloth,  
slightly dampened with a very mild detergent solution or glass cleaner.  
If you will not be using your home theater system for an extended period of time, it is always a good idea to turn the  
unit off using the power switch on the rear panel of the GTP-880. This will prevent the automatic turn on circuits from  
accidentally turning the system on during your absence.  
DO NOT SPRAY OR POUR LIQUIDS OFANY KIND DIRECTLY ONTO THE GTP-880.  
Servicing  
ADCOM has a technical service department to answer questions pertinent to the installation and operation of your unit.  
In the event of difficulty, please contact us for prompt advice. If your problem cannot be resolved through our combined  
efforts, we may refer you to an authorized repair agency, or authorize return of the unit to our factory. To aid us in  
directing you to a convenient service center, it would be helpful if you indicate which major city is accessible to your home.  
Please address mail inquires to:  
Phone, Fax or Email inquires to:  
ADCOM Service  
8551 East Anderson Drive, Suite 105  
Scottsdale, Arizona 85255 USA  
Voice: (480) 607-2277  
Fax: (480) 348-9876  
Monday through Friday  
9:00 AM to 5:00 PM MST  
Email: service@adcom.com  
For fax inquires, please include a return fax number for the reply. When calling or writing about your ADCOM product,  
be sure to note and refer to its serial number as well as the date of purchase and the dealer from whom it was  
purchased. In any communications to us, please include a daytime phone number where we may reach you. In the event  
the unit must be returned to our factory for service, you will be instructed on the proper procedure when you call or  
write for a return authorization. Under no circumstances should your unit be shipped to our factory without prior  
authorization, or packed in other than its original carton and fillers.  
If the original shipping carton and its fillers have been lost, discarded, or damaged, a duplicate carton may be obtained  
from our service department for a nominal charge.  
Always ship prepaid via United Parcel Service (UPS) or other approved carrier. Do not ship via parcel post, since the  
packing was not designed to withstand rough parcel post handling.  
FREIGHT COLLECT SHIPMENTS WILL NOT BE ACCEPTED  
UNDER ANY CIRCUMSTANCES.  
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FM Tuner Section  
Sensitivity  
GTP-880 Specification  
Preamplifier Analog Section  
IHF ......................................... 10dBµ typ.  
50dB S/N ................................... 13dBµ typ.  
S/N Ratio  
Input Impedance .................................... 26KΩ  
Output Impedance (Main-RCA) ...................... <600Ω  
Rated Input ...................................... 1.0Vrms  
Maximum Input ................................... 7.0Vrms  
Rated Output (100kΩ load) ........................ 2.0Vrms  
Minimum Load ....................................... 5kΩ  
Maximum Output ................................ 9.5Vrms  
Volume Range  
Mono ........................................ 72dB typ.  
Stereo ...................................... 60dB typ.  
Distortion  
Mono ........................................ 0.3% typ.  
Stereo ....................................... 0.5% typ.  
Stereo Separation .............................. 40dB typ.  
Adjacent Channel Selectivity ............... 50dB ± 400kHz  
Frequency Response ................ 20 Hz to 15 kHz ± 1dB  
Main ....................... -80dB to +10.0 dB (1dB res)  
Zone ....................... -80dB to +10.0 dB (1dB res)  
Bass Management  
High-Pass Slope .................... Crossover Frequency  
(Small Speaker Setting) .........12 dB/octave (2nd order)  
(Adj. 40/60/80/100/120/150Hz)  
AM Tuner Section  
Sensitivity (20dB S/N) .............................. 400uV  
S/N ................................................. 50dB  
Distortion ........................................... 0.7%  
One Signal Selectivity (± 10kHz) ..................... 35 dB  
Low-Pass Slope (Subwoofer) .... 24 dB/octave (4th order),  
40-150Hz as above  
Tone Control  
Bass Center Frequency/Range ............. 100Hz / ± 8dB  
Treble Center Frequency/Range .......... 10kHz / ± 8db  
Channel Separation (at 1kHz) ........................ 80dB  
Crosstalk Between Inputs (at 1kHz) .................. 85dB  
Video Section  
Bandwidth  
Composite & s-video ........................ 6 MHz -3dB  
Component Green ......................... 100MHz -3dB  
Component Red ........................... 100MHz -3dB  
Component Blue ........................... 100MHz -3dB  
All video inputs and outputs are 75 ohms, 1.5 Vp-p. Component inputs and outputs  
work with any Standard requiring ultra-wide bandwidth including Component-RGB,  
HDTV, line doublers, quadruplers, and scalers.  
Preamplifier Digital Section  
Frequency Response  
Direct Inputs ................ 10 Hz to 20 kHz +0 / -0.2 dB  
Analog-DSP Inputs ........... 10 Hz to 20 kHz +0 / -0.5 dB  
Digital Inputs ................ 10 Hz to 20 kHz +0 / -0.4 dB  
THD+N (at Rated Input & Output)  
6-Channel Direct Inputs ............ 0.0035% (80 kHz BW)  
Analog-Direct Inputs .............. 0.0035% (AES17 filter)  
Analog-DSP Inputs ................. 0.005% (AES17 filter)  
Digital Inputs ...................... 0.0025% (80 kHz BW)  
IMD (CCIF) @ 15 kHz & 16 kHz  
General  
Supply Voltage ........................ 105-130V, 60Hz only  
Power Consumption ................................. 45W  
Fuse Rating ...................... 1.0A slow-blow 5x20 mm,  
2.0A slow-blow 5x20mm  
6-Channel S/E Inputs ............................ 0.003%  
All Other Analog Inputs .......................... 0.002%  
Digital Inputs ................................... 0.005%  
S/N Ratio (ref. 2.0Vrms A-weighted)  
Dimensions  
Width ............................ 17 inches / 431.8 mm  
Height ........................... 5.75 inches / 146 mm  
Depth ............................ 16 inches / 406.4 mm  
Weight ................................... 28 lbs. / 12.7 kg  
Trigger Outputs 1, 2 (Zone) ............... Sequential Delay  
50 mA @ 12 VDC  
All Direct Inputs .................................. 98dB  
Analog-DSP Inputs ................................ 93dB  
Digital Inputs .................................... 100dB  
Specifications are subject to change without notice.  
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ADCOM  
A division of Klein Technology Group, LLC  
8551 East Anderson Drive, Suite 105  
Scottsdale, Arizona 85255  
Voice: (480) 607-2277  
Fax: (480) 348-9876  
GTP880_manual_v1.3  
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