Adcom Stereo Amplifier GTP 760 User Manual

GTP-760  
Digital Processing  
Tuner / Preamplifier  
OWNER’S MANUAL  
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SAFETY NOTIFICATION PAGE  
This equipment generates and uses radio frequency energy and if not installed and used  
properly (that is, in strict accordance with the manufacturer’s instructions), may cause  
interference to radio and television reception. It has been type tested and found to  
comply with the specifications Subpart J of Part 15 of FCC rules, which are designed to  
provide reasonable protection against such interference in a residential installation.  
However, there is no guarantee that interference will not occur in a particular installation.  
If this equipment does cause interference to radio or television reception, which can be  
determined by turning the equipment on and off, the user is encouraged to try to correct  
the interference by one or more of the following measures.  
• Reorient the receiving antenna  
• Relocate the processor with respect to the receiver  
• Move the processor away from the receiver  
• Plug the processor into a different outlet so that the processor and receiver  
are on different branch circuits.  
If necessary, the user should consult the dealer or an experienced radio/television  
technician for additional suggestions. The user may find the following booklet prepared  
by the Federal Communications Commission helpful: “How to identify and Resolve Radio-  
TV Interference Problems”.This booklet is available from the US Government Printing  
Office, Washington, DC, 20402, Stock No.004-000-00345-4.  
Caution To prevent electrical shock, do not use the polarized plug with an extension cord or receptacle, or  
other outlet, unless the blades can be fully inserted to prevent blade exposure.  
AttentionPour prévenir les chocs électriques ne pas utiliser cette fiche polarisée avec un prolongateur, une  
prise de courant ou une autre sortie de courant, sauf si les lames peuvente être insérées à fond sans laisser  
aucune partie a décourvert.  
Explanation of Graphic Symbols  
This “Lightning Flash with Arrowhead” symbol is intended to alert the user of the presence of uninsulated  
“dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of  
electric shock to persons.  
The “Exclamation Point” symbol is intended to alert the user to the presence of important operating and  
maintenance (servicing) instructions in the literature accompanying the appliance.  
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A NOTE FROM ADCOM  
Thank you and congratulations on your purchase of the ADCOM GTP-760 Digital ProcessingTuner/Preamplifier.  
The GTP-760 forms the centerpiece of a truly leading edge home theater system. To deliver the highest  
possible performance, ADCOM designers and engineers utilized the most advanced digital signal processing  
“engines” available, the Motorola 56000 series. The GTP-760 actually uses three processors in combination,  
two 56009’s and one 56007, for full 24-bit Dolby Digital and DTS decoding with digital bass management. In  
addition, we chose high precision six channel 20-bit Digital-to-Analog converters and all Class A analog output  
circuits for the finest possible sound.  
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, 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 fashion.  
CONCEALED SHIPPING DAMAGE  
Before your new GTP-760 left our factory, it was carefully inspected for physical imperfections and tested for all  
mechanical and electrical parameters as a routine part of ADCOM’s systematic quality control program. This  
should ensure a flawless product in both appearance and performance. After you have unpacked the GTP-760,  
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 your component ever need to be shipped or moved  
again.  
In the unlikely event that damage has occurred, notify your dealer immediately and request the name of the  
freight carrier so a written claim to cover shipping damages can be filed. THE RIGHT TO A CLAIM AGAINST A  
PUBLIC CARRIER CAN BE FORFEITED IFTHE 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.  
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 3,959,950,  
Canadian numbers 1,004,603 and 1,037,877.  
Dolby(r) Pro Logic(r), and Dolby Digital(r) are registered trademarks of Dolby Laboratories  
Licensing Corporation.  
Manufactured under license from Digital Theater Systems, Inc. US Patent Number  
US Pat.No.5,451,942 and other world-wide patents issued and pending. “DTS”, “dts”,  
DTS Digital Surround”, are trademarks of Digital Theater Systems, Inc.  
(Copyright 1996 DigitalTheater Systems, Inc. All Rights Reserved.  
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Table of Contents  
PRELIMINARY INFORMATION.....................................................................p. 2  
Safety Information  
A Note from ADCOM  
The ADCOM Protection Plan  
Unpacking your GTP-760  
1.0 PRODUCT FEATURES..........................................................................p. 6  
1.1 Front Panel Controls  
Headphone jack  
Power button and LED  
Surround mode button and LED indicators  
Dialog Enhance button  
Dynamic Range button and LED indicators  
DisplayWindow  
Tuner preset buttons  
Shift (8-14) button  
FM/AM button  
Seek/Manual button  
Tuning Down/Up buttons  
Panel Dim button  
Audio Mute button  
5.1 Channel In button  
Input Selector buttons and LED indicators  
MasterVolume control  
IR (infrared) sensor  
Room 2 button  
1.2 Rear Panel Inputs & Outputs — System Connections.........................p. 8  
Composite or S-Video?  
RCA jack color key  
Antenna connections  
Digital audio/standard (composite) video inputs  
DVD  
Digital 2  
Digital 1 (RF)  
Dig.1 RF demodulator switch  
12 volt trigger output  
Analog audio/standard (composite) video inputs and outputs  
LD (laserdisc) inputs  
VCR inputs and outputs  
Video aux. inputs  
Room 2 outputs  
Video Processor inputs and outputs  
Tape inputs and outputs  
Video monitor outputs  
CD inputs  
S-Video inputs and outputs  
DVD inputs  
Digital 2 inputs  
Digital 1 input ( RF )  
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LD input  
VCR input and output  
Video aux input  
Room 2 output  
Video monitor outputs  
Video Processor input and output  
Video Processor On/Off switch  
Remote control connections  
Infrared repeater outputs  
Remote sensor extension outputs  
Preamplifier outputs  
5.1 Channel inputs  
AC fuse holder  
AC power cord  
AC convenience outlet  
1.3 The Remote Control..................................................................................p. 19  
2.0 INSTALLING/CONNECTING THE GTP-760.............................................p. 28  
2.1 Physical Placement  
2.2 Connecting Source Components to the GTP-760  
3.0 INITIAL SETUP...............................................................................................p. 29  
3.1 The On Screen Display  
3.2 CHANNEL DELAY  
3.3 SPEAKER SIZE  
3.4 CHANNEL BALANCE  
3.5 INPUT SETTINGS  
4.0 BASIC OPERATION......................................................................................p. 34  
4.1 Surround Modes  
4.2 Tuner  
4.3 Room 2  
5.0  
6.0  
7.0  
TROUBLE SHOOTING.................................................................................p. 38  
CARE, MAINTENANCE, and SERVICE...................................................p. 40  
SPECIFICATIONS........................................................................................p. 41  
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1.0  
PRODUCT FEATURES  
1.1  
Front Panel Controls  
The GTP-760’s front panel is a model of simplicity. All controls are logically grouped for easy, intuitive  
operation. Familiarize yourself with the following diagram and read the short explanations of each  
feature. When you finish, you will be well on your way to enjoying the GTP-760’s convenience and  
sound quality.  
3
3
7
6
8
14  
15  
DTS  
Dolby Digital  
Cinema  
D
I
G
I
T
A
L
surround mode  
DVD  
digital  
1
digital  
2
Dolby Pro Logic  
symphony hall  
stadium  
G
T
P
-
7
6
0
RDS PROGRAM TYPE AM FM STEREO SEEK VOLUME MUTE PRESET  
18  
jazz club  
5-chan. stereo  
2-chan. stereo  
phones  
dialog enhance  
1
2
3
4
5
6
7
shift (8-14)  
LD  
CD  
VCR  
tape  
video aux  
D
I
G
I
T
A
L
SURROUND  
dynamic range  
FM/AM seek/manual  
<
tuning  
>
dim 5.1-channel in  
tuner  
room  
2
full  
75%  
50%  
25%  
1
2
5
4
9 10  
11  
12 13  
14  
16 17  
1
Headphone Jack: This accepts the stereo 1/4" phone plug connector used by almost all high  
quality headphones. When you use the headphone jack, the GTP-760’s rear panel main line  
level Preamp outputs are muted. Room 2 outputs are NOT affected.  
2
Power Button and LED: Use this button to turn your GTP-760 ON and OFF. When you first  
push the Power Button to the ON (depressed) position, the center LED will glow yellow until all  
circuitry stabilizes. When your GTP-760 is ready to use, the LED will turn red.  
NOTE: The front panel Power Button must be engaged to use the remote control. If the front  
panel Power Button is not depressed, the remote control will not have any effect. When the  
front panel Power Button is engaged, the remote controller’s “Power” button will cycle your  
GTP-760 between standby and operation modes. When in standby mode (indicated by the  
yellow LED), you need to press the remote control’s “Power” button to activate your GTP-760’s  
circuitry (the LED will turn red when you do this).  
3
Surround Mode Button and LED Indicators: Pushing the button sequentially steps your  
GTP-760 through all the available operating modes for the selected input. The modes that are  
not available for the current operating state are automatically bypassed.  
For the 6 analog inputs, the choices are always the same - Dolby Pro Logic, Dolby Pro Logic/  
Cinema, symphony hall, stadium, jazz club, 5-chan.stereo, and 2-chan.stereo.  
For digital inputs (DVD, digital 1 and digital 2) the choices are dynamic and depend on the type  
of signal being input.  
For DTS signals, the choices are DTS, DTS/Cinema and DTS/2 chan.stereo.  
For Dolby Digital 5.1 channel signals, the choices are Dolby Digital, Dolby Digital/Cinema and  
Dolby Digital/2 chan.stereo.  
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For familiar music CDs (also called PCM signals) the choices are the same as for analog  
inputs, Dolby Pro Logic, Dolby Pro Logic/Cinema, symphony hall, stadium, jazz club, 5-chan.  
stereo, and 2-chan. stereo. Because CDs do not carry Dolby Digital signals, the Dolby Digital  
option is not available and the GTP-760 automatically bypasses that choice.  
4
5
Dialog Enhance Button: A shelving filter with a corner frequency of 7 kHz that reduces the  
often excessive high frequencies on some movie soundtracks that make them fatiguing to  
listen to. It also provides a boost in the midrange output for center and front channel speakers.  
Dynamic Range Button and LED Indicators:This button, usable only with a Dolby Digital  
source, incrementally reduces the audio track’s dynamic range in four steps (full, 75%, 50%,  
and 25%) to allow comfortable listening under a wide variety of conditions. The normal, or  
default, position is full.  
Although we usually prefer to reproduce a source’s full dynamic range (the difference between  
very loud and very soft sounds), we occasionally need to reduce dynamics. For example,  
when playing a movie late at night, loud explosions might wake sleeping family members.  
Simply turning the volume control down would probably make a whisper in the next scene  
inaudible. The Dynamic Range button solves this dilemma by progressively lowering the  
volume of loud peaks while increasing the level of softer sounds. This allows you to hear every  
element of the soundtrack without disturbing those around you or forcing you to strain to hear  
delicate nuances.  
6
DisplayWindow: This shows all the pertinent information you will need to effectively use the  
GTP-760 on a daily basis. We carefully designed this window to display only the data you need  
at the time you need it. The window’s configuration will change as you ask the GTP-760 to do  
different things. The display normally shows the input you’ve selected. If you’re currently  
listening to AM or FM radio, the display shows that signal’s frequency. Additional information  
appears as needed and we’ll note these appearances in subsequent sections of this manual.  
7
8
Tuner Preset Buttons: These buttons allow quick access to up to 14 preselected AM or FM  
broadcast frequencies. To save presets, tune to the desired station and press one of these 7  
buttons. Continue to hold the button until it lights and the display shows the preset number.  
Use the Shift button in conjunction with these buttons to select and save presets 8-14.  
Shift (8-14) Button:This allows each of the 7 tuner preset buttons to do “double duty.” When  
the LED in the center of the shift button is illuminated red, the 7 tuner preset buttons activate  
tuner presets 8-14. When the LED in the center of the shift button is not illuminated, the 7  
tuner preset buttons activate tuner presets 1-7.  
9
FM/AM Button: As you might expect, this button selects AM or FM. In addition to the  
selected broadcast frequency, a small “AM” or “FM” indicator appears in the bottom of the  
Display Window to confirm your choice.  
10  
11  
12  
Seek/Manual Button: This controls the tuner’s scan function and working of the tuning buttons.  
In SEEK - goes UP to the next available station.  
In MANUAL - moves UP in increments to the desired frequency you select manually.  
Tuning Down/Up Buttons: These allow easy selection of all the stations your GTP-760 can  
receive. Remember that these Tuning buttons will scan to the next active or to the adjacent  
frequency depending on how you’ve set the Seek/Manual button described above.  
Dim Button: This reduces Display window brightness for listening or viewing in a dark  
room. The button simply switches between full and reduced illumination.  
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13  
5.1 Channel In Button: This button selects the 5.1 channel analog input, which allows the user  
to enjoy high-resolution, multichannel formats such as DVD-Audio and Super Audio CD. This  
pure analog input completely bypasses any digital conversion or processing to maintain the  
highest possible audio quality; thus, delay and bass management are disabled and no surround  
modes may be selected when using the 5.1 channel analog input. This input is selectable  
from the front panel only.  
14  
15  
Input Selector Buttons and LED indicators: These allow easy choice of any available input.  
When you select a particular input, the LED in the center of that button will light and the input  
name will appear in the Display window to confirm your choice. Choosing an input automati-  
cally selects the Surround mode last used with that input. You may change the Surround mode  
at any time by using the Surround Mode button (#3 above).  
MasterVolume Control: This rotary knob adjusts the volume for all active speakers simulta-  
neously. While it has the accustomed look and feel of the familiar analog volume control, it’s  
internal implementation is digital. The distinction will be apparent only in that the knob will  
NORMALLY be positioned near 12 o’clock for typical listening levels. This will be true for  
all sources.  
16  
17  
IR (infrared) Sensor:This small window receives commands from the remote controller.Do  
not block this window with accessories, cables, CD jewelboxes, etc., or the remote control  
will not work.  
Room 2 Button: Pressing this button will activate the Room 2 output circuitry, enabling any of  
six analog audio and video sources; LD, VCR, video aux, CD, tape, and tuner. Pressing the  
Room 2 button a second time will cause the LED’s on the available source buttons to il  
luminate. The source that is currently selected for Room 2 will be flashing. Choose the source  
you want to send to Room 2 by pressing the desired source button, it will illuminate steadily  
and the others will go off. Pressing and holding Room 2 for several seconds will turn the Room  
2 output OFF.  
1.2  
Rear Panel Inputs & Outputs — System Connections  
Like the front panel, the GTP-760’s rear panel is carefully arranged to make hookup,  
configuration, and use as simple as possible. However, the GTP-760’s extraordinary  
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 probably answer most of your questions about interfacing  
the GTP-760 with other components in your system. You will find more detailed information on initial  
setup and configuration in following sections of the manual.  
Note that the GTP-760’s RCA-style jacks have color-coded centers to make connections  
easier. Use this key to help route cables properly:  
YELLOW centers  
BLACK centers  
=
=
VIDEO inputs (composite)  
DIGITAL AUDIO inputs  
and  
CENTER CHANNEL and SUBWOOFER  
PREAMP inputs and outputs  
LEFT CHANNEL ANALOG AUDIO inputs  
RIGHT CHANNEL ANALOG AUDIO inputs  
WHITE centers  
RED centers  
=
=
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Composite or S-Video?  
One of the first system hook-up decisions to make will be which video format to use. While the composite  
video format is more widely used, S-Video can offer improved picture quality. The GTP-760 does not  
convert between the two formats. However, it can save the video mode for each input. It is  
recommended that only one video format be used as this simplifies normal operation. However, setup for  
using both formats is also described below. The GTP-760 is shipped from the factory ready for composite  
video sources and display devices.  
For CompositeVideo Only: If your television has only composite video inputs (usually a yellow colored  
RCA style connector) or you elect to use only composite video connections in your system, then the  
GTP-760 is already properly set. Connect a video cable from one of the two yellow “standard monitor”  
video jacks on the back of the GTP-760 to the video input of your television. Turn on the GTP-760 and  
television and verify a blue colored screen. If you are unable to get the blue screen, consult your television  
owner’s manual to determine how to select the appropriate television input. If you are certain your  
television is in the correct mode, follow directions 1 through 3 below (S-Video only). Repeat that procedure  
until the GTP-760 display reads COMPOSITE at the completion of step 3.  
For S-Video Only: If your television has an S-Video input and all of your video source components have  
S-Video outputs, then you will probably elect to use only S-Video connections in you home theater system.  
The following steps will switch the GTP-760 to S-Video operation.  
1) Turn the GTP-760 off via the front panel power switch.  
2) On the front panel, hold the surround mode button down and power the unit ON.  
3) Continue to hold the surround mode button until the front panel display of the GTP-760 reads S-VIDEO.  
The GTP-760 is now set for S-VIDEO operation. (Note: Repeating the procedure returns the unit to  
composite mode and COMPOSITE shows in the display). Connect an S-Video cable from one of the two  
“S-video monitor” jacks on the back of the GTP-760 to the S-Video input of your television. Turn on the  
GTP-760 and television and verify a light gray colored screen. If you are unable to get the gray screen,  
consult your television owner’s manual to determine how to select the appropriate television input.  
For using both Composite and S-Video: While more difficult to do, you may elect to use both video  
modes, if some of your video sources have composite video only and others have S-Video capability. This  
connection also requires that your television accepts both formats. A common scenario would be  
connecting both a VCR that has composite video only and a DVD player that has S-Video capabilities to  
your GTP-760. The GTP-760 will not convert between the different video types, but will remember the  
video mode for each of its inputs. Thus, when you select VCR, the GTP-760 switches to composite video  
mode. When you select DVD, the GTP-760 switches to S-Video mode. Consequently, to operate your  
system in this way connect BOTH a composite video cable from one of the “standard monitor” jacks on the  
back of the GTP-760 to the composite input on your television AND an S-Video cable from one of the  
“S-Video monitor” jacks on the back of the GTP-760 to the S-Video input of your television. (Note, in this  
example, the GTP-760 switches modes automatically, but you will still need to manually change the mode  
of your television anytime you switch between these inputs). Turn on the GTP-760 and television and  
verify a blue colored screen. If you are unable to get the blue screen, consult your television owner’s  
manual to determine how to select and use the television’s video inputs. All of the GTP-760 inputs are  
initially set for composite mode. Consult section 3.5 INPUT SETTINGS discussion of the VIDEO field to  
use the GTP-760 on screen display to save the S-Video mode settings for your S-Video sources.  
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18  
19  
Antenna connections  
Digital audio/standard (composite) video inputs  
DVD  
Digital 1 input (RF)  
LD input  
VCR input  
Digital 2  
VCR output  
Digital 1 ( RF )  
Video aux input  
20  
21  
22  
Digital 1 RF Demodulator switch  
12 volt trigger output  
Analog audio/standard  
(composite) video inputs and outputs  
LD (laserdisc) inputs  
VCR inputs and outputs  
Video aux in  
Room 2 output  
S-Video monitor outputs  
Video Processor input and output  
Video Processor On/Off switch  
Remote control connections  
Infrared repeater outputs  
Remote sensor extension outputs  
Preamplifier outputs  
5.1 inputs  
24  
25  
Room 2 outputs  
26  
27  
28  
29  
Video Processor inputs and outputs  
Tape inputs and outputs  
Standard (composite) video monitor outputs  
CD inputs  
AC power cord and AC fuse holder  
AC convenience outlets  
23  
S-Video inputs and outputs  
DVD input  
Digital 2 input  
18  
Antenna Connections:You need to connect different antennas for FM and AM reception.  
10  
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For FM, use either the 75 ohm “F” connector or the 300 ohm “push terminals” depending on  
what type of antenna you’ve chosen. If you’re getting FM from a cable system feed, you will  
most likely use the “F” connector. The “T” shaped antenna supplied with the GTP-760 uses the  
push terminals marked “300 ohms.Tantennas are directional. They should be placed as  
high as possible with the arms fully extended. If possible, the arms should be oriented so that  
they are at right angles to the transmitter.  
signal direction  
transmitter  
signal direction  
transmitter  
best reception  
poor reception  
FM antenna  
to GTP-760 FM  
antenna connection  
The supplied AM loop antenna connects to the push terminals marked “groundand “AM,”  
respectively. You may need to adjust the position of the antenna for best reception. If you use  
an outdoor AM antenna, follow the manufacturer’s instructions.  
19  
Digital Audio/Standard (Composite)Video Inputs  
Remember that you must choose either standard (composite) or S-Video  
connections before hooking up source components. This section of the  
manual assumes you have chosen composite connections. S-Video  
connections will be handled in a subsequent section.  
DVD in: Connect the DVD player’s composite video output to the yellow-center RCA jack  
immediately under theDVD inlabel.  
Connect the DVD player’s RCA-style digital output jack to the GTP-760’s black-center RCA  
jack located under the “DVD inlabel.  
Note: If your DVD player has only a TOSlink (optical) digital output, you may need to connect it  
to “dig.2 in. If this is the case, remember to connect the player’s video output (composite or S-  
11  
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L D  
i n  
D V D  
i n  
d i g i t a l 2 d i g i t a l 1  
i n i n  
1 2 V  
t r i g g e r o u t  
S t a n d a r d  
v i d e o  
i n  
D V D  
i n  
d i g i t a l 2 d i g i t a l 1  
i n i n  
L
d i g 1 R F  
d e m o d u l a t o r  
R
i n o u t  
Video) to the appropriate “dig.2 in” jack.  
Digital 2 in: This input is recommended for an audio/video source (DSS receiver, etc.) with a  
TOSlink (optical) digital output.  
Remember that the composite video connection will go to the yellow-center RCA jack  
immediately under the “dig.2 in” label.  
Connect the source’s TOSlink (optical) digital output to the GTP-760’s TOSlink socket located  
under the “dig.2 in” label.  
Digital 1 in (RF): We recommend this input for laserdisc players with a digital RF output.  
It is the only input on the GTP-760 equipped with the RF demodulator needed to process a  
laserdisc’s Dolby Digital encoded soundtrack.  
Connections follow the same pattern detailed in “DVD in” and “Dig.2 in” above. Connect the  
laserdisc player’s composite video output to the yellow-center RCA jack immediately under the  
“dig.1” label. Then connect the player’s coaxial digital output to the black-center RCA jack  
under the “dig.1 in” label.  
20  
Digital 1 RF Demodulator (bypass) Switch  
(see illustration on preceding page)  
This switch adds flexibility to the GTP-760. If you play laserdiscs with Dolby Digital-encoded  
soundtracks, put this switch in the IN position. This places the demodulator circuit in the signal  
path and allows proper Dolby Digital decoding.  
If you do not have a laserdisc player with a digital RF output, place the switch in the OUT  
position.You can then use this input in exactly the same way as you would use the DVD input.  
12  
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21  
12VoltTrigger Output  
(see illustration on preceding page)  
To facilitate remote turn-on and turn-off of other components (power amplifiers, for example),  
this 2.5 mm mini-jack provides a constant signal (12 volts DC) whenever the GTP-760 is fully  
powered. When the GTP-760 is turned off (via the front panel switch) or placed in standby  
mode (via the “power” button on the remote control), the jack has no output.  
22  
Analog Audio and Standard (Composite)Video Inputs and Outputs  
L D  
i n  
v id eo au x  
in  
r oom 2  
ou t  
VCR  
i n  
i n  
ou t  
ou t  
t a p e  
Sta ndar d  
vi de o  
i n  
in  
ou t  
in  
ou t  
CD  
LD (laserdisc) Inputs:  
Use these inputs as you have already used the digital source inputs (see #19 above.) After  
selecting and connecting the laserdisc player’s composite video output to the GTP-760’s  
yellow-center RCA jack immediately under the “LD in” label, connect the player’s left channel  
analog audio output to the white RCA jack under the “LD in” label. Then connect the player’s  
right channel analog audio output to the “LD in” red RCA jack.  
VCR Inputs and Outputs:  
Because you will use your VCR to record as well as play, take care to follow these  
instructions carefully.  
1) Connect the VCR’s composite video output to the GTP-760’s yellow-center RCA jack  
immediately under the “VCR in” label.  
2) Connect the VCR’s composite video input to the GTP-760’s yellow-center RCA jack  
immediately under the “VCR out” label.  
3) Connect the VCR’s left channel analog audio output to the GTP-760’s white “VCR in” jack.  
4) Connect the VCR’s right channel analog audio output to the red “VCR in” jack.  
5) Connect the VCR’s left channel analog audio input to the GTP-760’s white “VCR out” jack.  
6) Connect the VCR’s right channel analog audio input to the red “VCR out” jack.  
Note: You may want to use so-called “A/V combination” patch cords to make this step less  
confusing. Sold under a variety of names, these combination cables usually include a video  
conductor and two audio conductors in one cable assembly. If you elect to use them, make  
sure that they support the video format (composite or S-Video) you’ve chosen for your system.  
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Video Aux Input:  
This input is electrically identical to the LD input described above and will accommodate a wide  
variety of audio/video sources.  
After selecting and connecting the source’s composite or S-Video output to the GTP-760’s  
corresponding “video aux” video input, connect the source’s left channel analog audio output to  
the white RCA jack under the “video aux in” label. Then connect the source’s right channel  
analog audio output to the red RCA jack under the “video aux in” label.  
Room 2 Outputs:  
These outputs supply video and audio  
d i g i t a l  
i n  
2
d i g i t a l  
i n  
1
L D  
i n  
V C R  
v i d e o a u x r o o m 2  
i n  
o u t  
i n  
o u t  
signals for distribution to a secondary  
area or room in your home. Room 2  
features are covered in section 4.3 of  
this manual.  
r o o m 2  
o u t  
v i d e o p r o c e s s o r  
i n o u t  
s t a n d a r d m o n i t o r  
1
2
I R r e p e a t e r  
Connect the composite Room 2 video  
output to the video display device (TV  
or videoprojector) in the remote area.  
Make sure the cable(s) you use for this  
connection are high quality and well  
shielded as long cable runs act as  
t a p e  
o u t  
i n  
o u t  
C D  
f r o n t  
r e a r  
L
R
antennas for unwanted interference signals.  
(Depending on the distance between the GTP-760 and the display device and, to a lesser  
extent, the video format you’ve chosen, you may need a video distribution amplifier to make  
sure the signal arrives at the display device properly. Consult your ADCOM dealer for  
additional information if needed.)  
Connect the white “Room 2 out” jack to the left channel input of the amplifier used to power  
speakers in the remote area. Then connect the red “Room 2 out” jack to the amplifier’s right  
channel input.  
Video Processor Inputs and Outputs:  
These connections allow easy interface with video processors. Note that a separate video  
processor handles video signals only so you don’t need to concern yourself with any audio  
connections between it and the GTP-760. ( For additional information, consult your video  
processor’s manual )  
Connect the processor’s composite video output to the GTP-760’s  
video processor  
in out  
yellow-center “Video Processor in” jack. Then connect the video  
processor’s composite input to the GTP-760’s yellow-center “Video  
Processor out” jack.  
If you are using the GTP-760 with a separate video processor, make  
sure you’ve set the Video Processor switch to the “ON” position.  
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Tape Inputs and Outputs:  
These connections are designed for a cassette deck  
or any other audio recording device with line-level  
analog inputs and outputs.  
t a p e  
i n  
o u t  
CD  
L
R
Follow these instructions:  
1) Connect the recorder’s left channel analog audio output to the GTP-760’s white  
“tape in” jack.  
2) Connect the recorder’s right channel analog audio output to the red “tape in” jack.  
3) Connect the recorder’s left channel analog audio input to the GTP-760’s white  
“tape out” jack.  
4) Connect the recorder’s right channel analog audio input to the red “tape out” jack.  
Standard (Composite) Video Monitor Outputs:  
Connect the main monitor or display device to the yellow-center RCA jack  
under the “standard monitor 1” label. You may use the “standard monitor 2”  
jack for another monitor if desired. Properly connected, either monitor will  
then display an image from a video source or on-screen menu information  
when appropriate.  
s t a n d a r d m o n i t o r  
1
2
CD Inputs:  
These line-level analog inputs allow easy connection of a CD player (or other two channel  
analog audio source.)  
Follow these instructions:  
1) Connect the CD player’s left channel analog audio output to the GTP-760’s white  
“CD in” jack.  
2) Connect the CD player’s right channel analog audio output to the red “CD in” jack.  
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23  
S-Video Inputs and Outputs  
Note: This section assumes that you’ve elected to use S-Video sources and display devices and that  
you’ve set the GTP-760 for S-Video signal transfer by following the steps described in the boxed note  
entitled Composite or S-Video? on page 9.  
D V D  
i n  
d i g i t a l 2 d i g i t a l 1  
i n i n  
L D  
i n  
V C R  
v i d e o a u x r o o m 2  
i n o u t  
S - v i d e o m o n i t o r  
v i d e o p r o c e s s o r  
i n o u t  
i n  
o u t  
1
2
S - v i d e o  
When hooking up S-Video capable audio/video components, follow the steps outlined in Sections 19  
and 22 above. However, ignore the instructions for composite video connections and substitute  
the following:  
DVD in: Connect the DVD player’s S-Video output to the mini-DIN connector under the S-Video  
“DVD inlabel.  
Digital 2 in: Connect the source’s S-Video output to the mini-DIN connector under the S-Video  
“dig. aux in” label.  
Digital 1 in (Dolby Digital RF optional): Connect the source’s S-Video output to the mini-DIN  
connector under the S-Video “digital 1 in” label.  
LD in: Connect the LD player’s S-Video output to the mini-DIN connector under the S-Video  
“LD in” label.  
VCR in: Connect theVCR’s S-Video output to the mini-DIN connector under the S-Video  
“VCR in” label.  
VCR out: Connect theVCR’s S-Video input to the mini-DIN connector under the S-Video  
“VCR out” label.  
Video aux in: Connect the source’s S-Video output to the mini-DIN connector under the S-Video  
“video aux in” label.  
Room 2 Output: Connect the video display device to the S-Video mini-DIN output under the  
“room 2 out” label.  
S-Video Monitor Outputs: Connect the main monitor or display device to the mini-DIN jack  
under the “S-Video monitor 1” label. You may use the “S-Video monitor 2” jack for  
another monitor if desired. Properly connected, either monitor will then display an  
image from a video source or on-screen menu information when appropriate.  
Video Processor Input and Output: Connect theVideo Processor’s S-Video output to the mini-DIN  
jack immediately under the “video processor in” label. Then connect the video  
processor’s S-Video input to the mini-DIN jack under the “video processor out” label.  
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24  
25  
Video Processor On/Off Switch  
This switch controls a “video loop” that enables the GTP-760 to function with a separate  
video processor.  
For conventional home theater systems, make sure the “video processor on/off” switch is in the OFF  
position. When using a separate video processor, place this switch in the ON position.  
Remote Control Connections  
rem ote s en so r  
ex ten s io n  
I R r e p e a t e r  
I R i n p u t  
.
Infrared Repeater:These mini-jack outputs transfer command codes received from either the IR  
mini-jack or remote sensor extension inputs to an IR repeater located close to other  
system components. IR signals received at the GTP-760’s front panel IR receptor are  
NOT available at the infrared repeater outputs.  
Remote Sensor Extension Inputs:These inputs receive signals from ADCOM’s XR500II and  
SPM500II remote control sensors.  
IR (Infrared) Input:This input accepts modulated IR commands from industry standard IR  
controllers via a mono mini-plug connector.  
26  
Preamplifier Outputs  
preamp outp uts  
fr on t  
rear  
cen ter  
sub woofer  
L
1
R
2
These are the GTP-760’s main outputs. Connect each to the proper amplifier or amplifier channel  
as follows:  
1) Connect the white-center RCA output marked “front L(eft)” to the amplifier channel  
designated for the left front loudspeaker.  
2) Connect the red-center RCA output marked “front R(ight)” to the amplifier input designated  
for the right front loudspeaker.  
3) Connect the white-center RCA output marked “rear L(eft)” to the amplifier input designated  
for the left rear loudspeaker.  
4) Connect the red-center RCA output marked “rear R(ight)” to the amplifier input designated  
for the right rear loudspeaker.  
5) Connect the black-center RCA output marked “center” to the amplifier input designated for  
the center channel loudspeaker.  
6) Connect the black-center RCA output marked “subwoofer” to the amplifier input  
(in most cases, the line-level input of a powered subwoofer) designated for  
the subwoofer.  
Note: There are two subwoofer outputs (1 & 2.) They are in parallel (i.e., each produces an  
identical signal) and may be used interchangeably. We’ve included these outputs to make it  
easier to add a second subwoofer, if desired. Alternatively, you can connect the LEFT and  
RIGHT channel RCA jacks to a single subwoofer.  
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27  
5.1 Channel Inputs  
f r o n t  
r e a r s u b w o o f e r  
These are the multichannel analog inputs. Connect your DVD-  
Audio, SACD or other multichannel source as follows:  
c e n t e r  
5 . 1 - c h a n n e l i n  
1) Connect the source’s “front left” output to the white-centered RCA input marked “front”.  
2) Connect the source’s “front right” output to the red-centered RCA input marked “front”.  
3) Connect the source’s “surround left” output to the white-centered RCA input marked “rear”.  
4) Connect the source’s “surround right” output to the red-centered RCA input marked “rear”.  
5) Connect the source’s “center” output to the black-centered RCA input marked “center”.  
6) Connect the source’s “subwoofer” output to the black-centered input marked “subwoofer”.  
Note:The GTP-760 does not apply bass-management to the 5.1 channel analog inputs, and all  
six input channels will pass full range signals. Some multichannel sources may not make use  
of bass-management techniques. Please read the multichannel source’s manual carefully to  
ensure correct operation.  
28  
AC Fuse Holder  
**CAUTION** UNPLUG the unit before checking the fuse!  
This holder provides easy access to the AC line fuse if that fuse needs replacement. To gain access to  
the fuse, insert a Phillips head screwdriver and turn counterclockwise. After replacing the fuse, reseat  
the holder by turning clockwise until the holder is firmly seated.  
When replacing the fuse, ALWAYS use one of equal value (for domestic models use a F500mA, 250V  
fuse available at any electronic parts store.) NEVER use a fuse of higher value. If the fuse fails again,  
consult your ADCOM dealer or call the ADCOM Service Department directly.  
AC Power Cord (115VAC models)  
Make sure to seat this cord firmly in an unswitched wall socket to provide uninterrupted power to the  
GTP-760. When removing the cord from an AC socket, NEVER pull on the cord itself. Instead,  
grasp the plug firmly and remove it from the socket. You may need to “rock” the plug lightly for  
easier removal.  
AC Power Cord Receptacle (export models)  
This IEC-standard socket accepts a wide variety of AC power cords.  
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29  
AC Convenience Outlets (115VAC models)  
These outlets are for low-current source components only. They are not  
designed for power amplifiers.  
The single unswitched outlet is live whenever the GTP-760 is plugged into a live AC source. The two  
switched outlets are live only when the GTP-760 is fully operational (i.e., whenever the front power  
button’s LED is red.) They are not live when the GTP-760 is in standby mode (when the LED is yellow.)  
Observe the wattage limitations printed above the two switched and one unswitched outlets. Note that  
the 500VA figure (equivalent to 500 watts) above the two switched outlets is a maximum figure for both  
outlets combined. Do not exceed this limit.  
We strongly recommend the use of our surge suppresser/ line conditioners, the ADCOM ACE family of  
products, for systems with substantial amplifiers and many source components. The ACE products  
relieve the GTP-760 from handling large current surges, while they protect your entire system by  
filtering and conditioning the AC current. In addition to the numerous heavy duty AC outlets of the  
ACE-315, the ACE-615 includes sequential power-up and power-down modes to minimize “thumps”  
whenever you turn your system on or off.  
1.3  
The Remote Control  
The GTP-760 remote control is a learning remote control 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.  
The single most important aspect to master about the GTP-760 remote control is the function of the  
eight source select buttons at the top of the remote. These are buttons 30 in the figure on the next  
page. Each of these buttons cause two things to happen when used. First, they select the  
corresponding input on the GTP-760. Second, THESE KEYS REMAP ALL OFTHE OTHER BUTTONS  
ON THE REMOTE CONTROL. You can think of each of these buttons as having a page of commands  
associated with it.  
Most of the GTP-760 remote commands are saved under the main remote page. Whenever you desire  
to control the GTP-760 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-760 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 select/play button. Notice now that the CD source button lights.  
The CD remote page is now active. If you have an ADCOM CD 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 preprogrammed in the CD remote page. If your GTP-760 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-760 display.  
The button description that follows distinguishes the function 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 and CD pages.  
The ADCOM universal remote controller is preset to operate most GTP-760 functions (MAIN  
device mode), GTP-760 AM/FM tuner functions (TUNER device mode) and GCD-700/750 CD  
functions (CD device mode).  
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30  
Source selectors  
main  
DVD  
dig.1 (digital RF — digital LD)  
dig.2 (digital auxiliary)  
tuner  
CD  
VCR  
57  
30  
v. aux (video auxiliary)  
Adcom tuner/preamp  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
Power  
Input selectors  
Volume Up/Down  
Tuning Up/Down  
Guide  
main  
tuner  
DVD  
CD  
Dig.1  
digital LD  
VCR  
Dig.2  
v.aux  
Menu  
power  
34  
31  
32  
< (left arrow)  
Up arrow/Pause  
> (right arrow)  
Down arrow/Stop  
Select/Play  
Direct access keypad  
(“1” through “10” and “+10”)  
Shift  
FM/AM  
Stereo  
Srnd (surround)  
Enter  
d. (dynamic) range  
dialog  
volume  
tuning  
LD  
tape  
tuner preset scan  
menu  
guide  
33  
41  
35  
38  
40  
pause  
select  
play  
43  
44  
45  
46  
47  
48  
49  
50  
I
I
37  
39  
stop  
exit  
delay  
44  
45  
46  
43  
1
4
2
5
8
0
3
6
FM/AM  
stereo  
srnd  
Level trim  
Rear Up/Down  
Center Up/Down  
Sub Up/Down  
Bal. chk (balance check)  
Dim  
M1, M2, M3, M4 (Macro keys)  
Room 2  
Backlight  
42  
9
7
51  
52  
53  
54  
55  
56  
57  
+10  
shift  
enter  
d.range  
bal.chk  
47  
51  
52  
50  
48  
49  
53  
dialog rear center sub  
dim  
Mute  
Status LED light  
m1  
m2  
m3  
m4  
room2  
backlight  
mute  
54  
55  
56  
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30  
Source Selectors (main, DVD, VCR, tuner, v. aux, CD, dig.1, dig.2.)  
These buttons serve two functions.  
First, they switch inputs on the GTP-760 so you can hear the source you’ve just selected.  
Second (and even more important), they can change the functions of all the other buttons on the  
remote controller. In other words, if you first push the DVD device selector, the remote’s select/play  
button generates a command code for your DVD player. If you then press the dig.2 device selector,  
the same select/play button would send a different command code that might, for example, start  
your mini-disc player. (Of course, this all depends on how you programmed the remote in the first  
place. Don’t worry-we’ll cover that shortly.)  
31  
32  
Power  
In main mode (after you’ve pressed the main device selector), this is preprogrammed to turn the  
GTP-760 on and off.  
In tuner mode, it is also preprogrammed to turn the GTP-760 on and off.  
The button is programmable for use with other sources.  
Input Selectors (tape, LD)  
In main mode, these are similar to the source selectors described above but they switch only  
GTP-760 inputs. They DO NOT automatically change the functions of other remote buttons.  
These buttons are programmable for use with other sources.  
33  
34  
35  
Volume Up/Down  
These are the only buttons preprogrammed at the factory with the same command.  
In all modes, these buttons change the master volume setting of the GTP-760.  
Tuning Up/Down  
In tuner mode, these buttons are preprogrammed to scan up or down the GTP-760’s AM or FM band.  
They are programmable for use with other sources.  
Guide  
This is intended for easy call-up of cable or satellite program guides.  
Button is programmable for use with any source.  
In CD mode, it is preprogrammed for audible reverse scan with an ADCOM CD player  
36  
37  
38  
Menu  
In main mode, this is preprogrammed to call up the GTP-760’s SETUP menu system.  
(A subsequent push will exit the menu, regardless of which menu screen you are in.)  
It is programmable for use with any source.  
In CD mode, it is preprogrammed for audible forward scan with an ADCOM CD player  
< (left arrow)  
In main mode, this is preprogrammed to step through the various choices you might wish to select  
while a menu item is highlighted.  
In CD mode, it is preprogrammed for audible reverse scan with an ADCOM CD player  
The button is programmable for use with any other source.  
Up arrow/Pause  
In main mode, this is preprogrammed to scroll up to the next choice on a menu screen.  
In CD mode, it is preprogrammed to pause an ADCOM CD player.  
In tuner mode, it is preprogrammed to start scanning preset frequencies higher than the  
current station.  
The button is programmable for use with any other source.  
39  
> (right arrow)  
In main mode, this is preprogrammed to step through the various choices you might wish to select  
while a menu item is highlighted.  
In CD mode, it is preprogrammed for audible forward scan with an ADCOM CD player  
The button is programmable for use with any other source.  
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40  
Down arrow/Stop  
In main mode, this is preprogrammed to scroll down to the next choice on a menu screen.  
In CD mode, it is preprogrammed to stop an ADCOM CD player.  
In tuner mode, it is preprogrammed to start scanning preset frequencies lower than the  
current station.  
The button is programmable for use with any other source.  
41  
42  
43  
Select/Play  
In main mode, this is preprogrammed to enter a selection chosen via the menu system.  
In CD mode, it is preprogrammed to start an ADCOM CD player.  
The button is programmable for use with any other source.  
Direct Access Keypad (buttons1through10,and “+10”)  
In Tuner mode, buttons “1through “7” are preprogrammed to access preset stations.  
In CD mode, buttons are preprogrammed as track access commands for the ADCOM CD player.  
The buttons are programmable for use with any other source.  
Shift  
In Tuner mode, button is preprogrammed to access presets 8 through 14 (“Shift” + “2” = preset  
number 9, etc.)  
In CD mode, button is preprogrammed as “call” command for ADCOM CD player.  
The button is programmable for use with any other source.  
44  
45  
FM/AM  
InTuner mode, button is preprogrammed to switch between FM and AM bands.  
In CD mode, button is preprogrammed as “repeatcommand for ADCOM CD player.  
The button is programmable for use with any other source.  
Stereo  
In Tuner mode, button will change playback from Stereo to Mono.  
In CD mode, button is preprogrammed as “program/memory” command for ADCOM CD player.  
The button is programmable for use with any other source.  
In main it will switch to 2 channel.  
46  
47  
48  
49  
Srnd (surround)  
In main mode, button is preprogrammed to step through GTP-760’s various operation modes.  
In CD mode, button is preprogrammed to initiate random play with ADCOM CD player.  
The button is programmable for use with any other source.  
Enter  
In tuner mode, button is preprogrammed to select “manual” or “seek” tuning modes.  
In CD mode, button is preprogrammed as “time” command for ADCOM CD player.  
The button is programmable for use with any other source.  
d. (dynamic) range  
In main mode, button is preprogrammed to adjust dynamic range of Dolby Digital encoded sources.  
In CD mode, button is preprogrammed to access disc 1 with ADCOM CD player.  
The button is programmable for use with any other source.  
dialog  
In main mode, button is preprogrammed to call up or cancel “dialog enhance” equalization.  
In CD mode, button is preprogrammed to begin and end “A-Brepeat with ADCOM CD player.  
The button is programmable for use with any other source.  
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50  
Level trim (Rear Up/Down, Center Up/Down, Sub Up/Down)  
Rear Up  
In main mode, button is preprogrammed to increase both rear speaker levels simultaneously.  
In CD mode, button is preprogrammed to access disc 2 with ADCOM disc player.  
The button is programmable for use with any other source.  
Rear Down  
In main mode, button is preprogrammed to decrease both rear speaker levels simultaneously.  
In CD mode, button is preprogrammed to clear “repeat” command with ADCOM disc player.  
The button is programmable for use with any other source.  
Center Up  
In main mode, button is preprogrammed to increase center channel speaker level.  
In CD mode, button is preprogrammed to access disc 3 with ADCOM disc player.  
The button is programmable for use with any other source.  
Center Down  
In main mode, button is preprogrammed to decrease center channel speaker level.  
The button is programmable for use with any other source.  
Sub Up  
In main mode, button is preprogrammed to increase subwoofer level.  
In CD mode, button is preprogrammed to access disc 4 with ADCOM disc player.  
The button is programmable for use with any other source.  
Sub Down  
In main mode, button is preprogrammed to decrease subwoofer level.  
The button is programmable for use with any other source.  
51  
Bal. chk (balance check)  
In main mode, button is preprogrammed to initiate balance check procedure with test tone and  
BALANCE CHECK menu screens.  
In CD mode, button is preprogrammed to access disc 5/Memory Clear with ADCOM disc player.  
The button is programmable for use with any other source.  
52  
53  
Dim  
In main and tuner modes, button is preprogrammed to dim GTP-760’s information display.  
The button is programmable for use with any other source.  
M1, M2, M3, M4 (Macro keys)  
M1  
In main mode, button is preprogrammed to select Tape 2 input (not applicable to GTP-760.)  
The button is programmable for use with any other source.  
M2  
In main mode, button is preprogrammed to selectVideo 4 input (not applicable to GTP-760.)  
The button is programmable for use with any other source.  
M3 and M4  
These buttons are programmable for use with any source.  
54  
Room 2  
In main mode, button is preprogrammed to turn Room 2 on, show Room 2 status and turn Room 2 off.  
The button is programmable for use with any other source.  
55  
56  
Backlight  
No programming capabilities. Button backlights all keys for eight (8) seconds when pressed.  
Mute  
In main, tuner, and CD modes, button is preprogrammed to mute outputs of device.  
The button is programmable for use with any other source.  
57  
Status LED  
Lights in different colors and patterns during learning operations as descriped in the remote  
programming section  
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Remote Function Table  
This table supplements the information 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 enjoyment 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 preprogrammed for a GTP-760 function, under CD to see what CD commands are preprogrammed, and  
underTUNER to see all preprogrammed tuning functions.  
BUTTON  
FUNCTION  
Main  
CD  
Tuner  
All Others  
MAIN  
Selects MAIN  
DVD  
Selects DVD  
None  
None  
None  
VCR  
Selects VCR  
None  
None  
None  
TUNER  
V. AUX  
CD  
SelectsTUNER in  
Selects VIDEO AUX  
Selects CD  
None  
None  
None  
None  
None  
None  
None  
None  
None  
Dig.1  
Selects DIGITAL 1 (RF)  
Selects DIGITAL 2  
Power On/Off & Macro  
Not programmable  
Not programmable  
Master volume up  
Master volume down  
Selects TAPE  
None  
None  
None  
Dig.2  
None  
None  
None  
POWER  
TUNING +  
TUNING -  
VOLUME +  
VOLUME -  
TAPE  
Not Programmable  
Disc Skip +  
Disc Skip -  
Master volume up  
Power On/Off  
Tuning +  
Tuning -  
Master volume up  
Not Programmable  
Programmable  
Programmable  
Master volume up  
Master volume down Master volume down Master volume down  
Programmable  
Programmable  
Track reverse  
Track forward  
Polarity  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Preset Scan +  
Preset Scan -  
Programmable  
Programmable  
Programmable  
Preset 1  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
LD  
Selects LD  
GUIDE  
MENU  
EXIT  
Not programmable  
On-screen display  
Not programmable  
Sets rear chan. delay  
OSD scroll up  
DELAY  
UP/PAUSE  
DOWN/STOP  
<
Open/close drawer  
Pause  
OSD scroll down  
OSD left select  
Stop  
Search reverse  
Search forward  
Play  
>
OSD right select  
SELECT/PLAY OSD “Enter” command  
1
2
3
4
5
6
7
8
9
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Track 1  
Track 2  
Preset 2  
Track 3  
Preset 3  
Track 4  
Preset 4  
Track 5  
Preset 5  
Track 6  
Preset 6  
Track 7  
Preset 7  
Track 8  
Programmable  
Programmable  
Track 9  
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BUTTON  
FUNCTION  
Main  
CD  
Tuner  
All Others  
0
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Stereo mode select  
Surround mode select  
Not programmable  
Dynamic range adjust  
Rear level up  
Track 10  
+ 10  
Programmable  
Programmable  
Presets 8 - 14  
FM or AM select  
Stereo/Mono  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
For Macro use  
For Macro use  
For Macro use  
For Macro use  
Programmable  
Programmable  
+ 10  
SHIFT  
FM/AM  
STEREO  
SRND  
ENTER  
D. RANGE  
REAR +  
CENTER +  
SUB +  
BAL. CHK  
DIALOG  
REAR -  
CENTER -  
SUB -  
Call  
Repeat  
Program/Mem.  
Random play  
Time display  
Disc 1  
Programmable  
Seek/Manual  
Programmable  
Programmable  
Programmable  
Programmable  
Disc 2  
Center level up  
Disc 3  
Subwoofer level up  
Balance check  
Disc 4  
Disc 5/Memory clear Programmable  
Dialog enhance on/off  
Rear level down  
Center level down  
Subwoofer level down  
Dim display  
A-B repeat  
Programmable  
Programmable  
Programmable  
Programmable  
Dim Display  
Clear repeat  
Programmable  
Programmable  
Programmable  
For Macro use  
For Macro use  
For Macro use  
For Macro use  
Programmable  
Mute volume  
DIM  
M1  
For Macro use  
For Macro use  
For Macro use  
For Macro use  
For Macro use  
Programmable  
Mute volume  
M2  
For Macro use  
M3  
For Macro use  
M4  
For Macro use  
ROOM 2  
MUTE  
Room 2 source select  
Mute volume  
PROGRAMMING YOUR ADCOM GTP-760 REMOTE CONTROLLER  
Introduction  
The ADCOM universal remote controller operates eight different audio/video components. As you’ve already  
seen, it’s preprogrammed to control ADCOM’s GTP-760 Preamp/Tuner and the GCD-700 CD player. In addition,  
it has five “component memory banks” available so you can program the remote to learn commands for your  
DVD player, satellite box, laserdisc player, VCR, etc. This lets you use one remote controller for your  
entire system.  
Using Preprogrammed Commands  
Using the remote controller’s preprogrammed commands is simple. For most GTP-760 functions (volume up/  
down, changing surround modes, etc.), follow these easy steps.  
1.  
2.  
Press the main source selector button. This tells the remote that you want to use GTP-760  
preprogrammed commands. The main button will flash red to tell you it understands.  
Press the appropriate function button (volume up, volume down, etc..) If you’ve selected a button  
that actually triggers a GTP-760 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 preprogrammed.  
(Reviewthe table above to see which buttons are preprogrammed.)  
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For tuner functions (changing stations, etc.):  
1.  
2.  
Press the tuner source selector button. It will flash red.  
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 preprogrammed.)  
Press the CD source selector first to access preprogrammed commands for ADCOM CD players.  
NOTE: You can program new commands over the preprogrammed commands in tuner and CD if you wish.  
However, you cannot program any buttons, even those unprogrammed with GTP-760 command codes, while  
you’re in main mode. This safety feature assures you that you will always be able to fully enjoy the  
GTP-760’s capabilities.  
ProgrammingYour Own Commands  
You can supplement preprogrammed commands with commands 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 the appropriate source selector button. For example, if you’re teaching your ADCOM remote commands  
for your DVD player, press the DVD source selector first. You can “teach” your remote new commands for any  
function button (except backlight) after you’ve selected DVD, VCR, TUNER, V.AUX, CD, Dig.1 or Dig.2.  
1.  
2.  
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.  
Press the ADCOM remote’s appropriate source selector and select/play buttons simultaneously. Hold  
both buttons until the status LED turns orange and the source selector button glows red. Both indica  
tors should remain lit.  
3.  
4.  
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.  
Find the corresponding button on the source component’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.  
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.  
Save the commands you’ve just programmed into the ADCOM remote by pressing and holding the appropriate  
source selector and select/play 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.  
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Deleting (clearing) Individual Programmed Commands  
1.  
Press the ADCOM remote’s source selector and select/play buttons simultaneously and hold until the  
orange status LED and the source selector button glow steadily.  
2.  
3.  
Press the function button you wish to clear. The status LED will flash continuously.  
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.  
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/play buttons  
simultaneously. The orange status LED and the source selector button will turn off.  
Deleting all the Programmed Commands for one Source Component  
1.  
2.  
Press the ADCOM remote’s source selector and select/play buttons simultaneously and hold until the  
orange Status LED and the source selector button turn on and remain lit.  
Press and hold down the backlight button.The red Status LED and the Device button will flash five  
times, the Status LED will then flash green twice and turn to a constant orange, indicating that all the  
learned information for the device mode selected has been erased.  
3.  
To exit this feature, press and hold the ADCOM remote’s source selector and select/play buttons  
simultaneously.The orange status LED and the source selector button will flash twice and  
then turn off.  
Deleting all the Programmed Commands for every Source Component  
NOTE:This procedure erases every programmed command accessed under the DVD,VCR,  
TUNER, V.AUX, CD, Dig.1 and Dig.2 input selectors. Make sure you really want to do this  
before following the step below.  
1.  
Press and hold the CD input selector and the backlight button simultaneously. The red status LED  
will flash twelve times. The status LED will then flash green once, followed by a single orange pulse.  
All LEDs will then turn off, indicating that every learned command in the ADCOM remote has  
been erased.  
Macro Commands  
“Macro” commands are simply a series of individual commands initiated by pushing just one button.  
The ADCOM remote can learn up to 10 individual commands and store them as a single macro.  
There are five “macro initiator” buttons on the ADCOM remote: power, m1, m2, m3, and m4. Each “macro  
initiator” can store and transmit either of two complete macros, depending 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,  
dig. 1, and dig. 2 in Group 1; tuner, CD, VCR, and v. aux in Group 2. When you program a “Group 1” macro,  
you will start by pushing the main source selector. After you’ve completed and memorized that macro com-  
mand series, you can initiate it whenever you’re in main, DVD, dig. 1, or dig. 2 modes. Similarly, you will  
program “Group 2macros by pushing tuner first and can use them whenever the tuner, CD, VCR, or v. aux  
inputs are active.  
For example, if the m1 button is programmed in Group 1 mode to turn on the TV, turn on the audio receiver, turn  
on the VCR, and then turn on the satellite receiver, it will perform the same series of commands whenever the  
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m1 button is pressed IF main, DVD, dig. 1, or dig. 2 sources are active at the time you select that macro. If  
you’ve programmed a Group 2 macro, it will send out an identical command sequence whenever tuner, CD,  
VCR, or v. aux inputs are active.  
Programming Macro Initiator Buttons:  
1.  
Press either the Group 1 or Group 2 source selector button (main or tuner respectively) and the mute  
button simultaneously. Hold both buttons until the red status LED and the input selector button  
remain lighted.  
2.  
3.  
Press the macro initiator button (power, m1, m2, m3 or m4) you wish to program.  
Select and press up to 10 buttons you wish to store in the macro. Both source selector and function  
buttons count as individual commands. Remember that each macro can hold only up to 10  
individual commands.  
4.  
Press the tuning up button to save the macro. The red status LED and input selector button will blink  
twice to confirm programming and then turn off.  
Please note:  
* To add a power (on/off) command to the macro, use the mute button in place of the  
power button.  
*The tuning up/down buttons cannot be used in a macro sequence.  
Deleting Macro Initiator Buttons:  
1.  
Press either the Group 1 or Group 2 source selector button (main or tuner respectively) and the mute  
button simultaneously. Hold both buttons until the red status LED and the input selector button  
remain lighted.  
2.  
3.  
Press the macro initiator button (power, m1, m2, m3 or m4) you wish to delete.  
Press the tuning up button. The red status LED and input selector button will blink twice to confirm  
deletion of the macro.  
2.0 INSTALLING/CONNECTING THE GTP-760  
2.1 Placement  
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-760 (and other audio/video components) away from moisture and out of direct sunlight.  
Bear in mind that the GTP-760’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" of free space behind the GTP-760  
for maximum flexibility.  
2.2 Connections  
Section 1.2 above has already provided the information you need to successfully connect all the audio/  
video components you will need for a sophisticated home theater system. Your ADCOM dealer will  
be pleased to assist you should you require detailed answers to more advanced system  
configuration questions.  
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3.0 INITIAL SETUP  
What this section is all about . . .  
After connecting your home theater, you may elect to configure the GTP-760 to the specific speaker arrange-  
ment and dimensions of your system. The procedures described in this section demonstrate how to use the  
GTP-760’s on screen display to enter this information. Once complete, the GTP-760 stores this information so  
that these tasks need only be repeated if speakers are changed or substantially repositioned. It should be  
noted that ADCOM’s factory presets have already been tailored for the most common home theater system - 5  
mid/high frequency speakers and a subwoofer. For such a system, the setup of the GTP-760 may already  
be near optimum.  
3.1  
The On Screen Display  
You will use the GTP-760 on screen display during this setup procedure. If you have not yet connected  
your television to the GTP-760, consult the box titled Composite or S-Video in Section 1.2. With this  
step successfully complete, your television and GTP-760 are on and the television screen shows a  
blue (composite video) or light gray (S-Video) screen.  
On the GTP-760 remote control, press main and then menu. The television should now show the  
setup menu.  
SETUP  
1 INPUT SETTINGS  
2 CHANNEL DELAYS  
3 SPEAKER SIZE  
4 CHANNEL BALANCE  
5 EXIT  
There are four sub-menus on this screen. These are:  
INPUT SETTINGS - shows information about the current state of operation of the GTP-760 and repeats  
much of the same information shown on the GTP-760’s front panel. This menu should be the only part  
of the on screen display you might elect to use regularly after set up is complete. It allows you to  
easily see the operating mode from the listening position. We will revisit the INPUT SETTINGS menu  
in section 3.5 after set up is complete.  
CHANNEL DELAYS, SPEAKER SIZE and CHANNEL BALANCE are the system setup menus. We  
will now use these for set up.  
3.2  
CHANNEL DELAYS  
With the SETUP screen visible, use the ( or ( button on the remote control to highlight CHANNEL  
DELAYS and press select/play. You will see the following screen:  
CHANNEL DELAYS  
CENTER  
REAR  
0 mS  
15 mS  
UNDO CHANGES  
DONE  
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In a typical home theater system, the distance from each speaker to the listening position will be  
different. The most common example: in many home theaters the center and rear speakers sit closer  
to the listener than the main speakers. In such a situation the sound emitted from the closer speakers  
will be heard first. For many movie soundtracks the effect of this may be very mild, perhaps unnotice  
able. In others, it can be subtly distracting. To compensate for this, the GTP-760 can slightly delay the  
audio sent to the center and rear (closer) speakers. In this way, when playing Dolby Digital or Dolby  
Pro Logic soundtracks, the sound from all speakers arrives uniformly at the listening position as  
intended by the film’s producer[FD1].  
L
C
R
DIM C  
DIM L  
DIM R  
LS  
RS  
DIM LS  
DIM RS  
To set the center channel delay, use the ( or ( buttons to highlight the CENTER field. Measure the  
distance from the listening position to the center speaker (DIM C) and to one of the main speakers  
(DIM L or DIM R). Subtract the center channel distance from the main L or R channel distance. For  
example, if the main speakers are 15 feet from the listening position and the center speaker is 12 feet,  
the difference is 3 feet and the center channel delay is set to 3 milliseconds (15-12 = 3). Use the < and  
> arrow button on the remote control to change the CENTER delay settings. The GTP-760 can delay  
the center channel output up to 5 milliseconds and thus compensates for center channel speakers that  
are up to 5 feet closer to the listening position than the main left and right speakers.  
In rare system setups, the center channel speaker is actually farther away than the main left and right  
speakers. In these cases, set the center channel delay to 0mS.  
Similarly, for the rear channels, use the ( or ( buttons to highlight the REAR field. Measure the distance  
from the listening position to either the left or right surround speaker (DIM LS or DIM RS). Subtract the  
rear speaker distance from the main speaker distance. The resulting distance is equivalent to the delay  
in milliseconds for the rear delay setting. For example, if your rear speaker distance is 9 feet and the  
front distance is 15 feet, the correct rear channel delay setting is 6 milliseconds (15-9=6). Again, set  
the rear channel delay to 0 if the rear channels are further from the listening position than the fronts.  
When both delays have been entered, highlight DONE and press select/play to save your settings and  
return to the SETUP menu.  
3.3  
SPEAKER SIZE  
In the SETUP screen, use the or arrows to highlight SPEAKER SIZE and press select/play.  
You will see:  
SPEAKER SIZE  
SELECT PRESET: 1  
MAIN: SMALL  
CENTER: ON  
REARS: ON  
SUBWOOFER: ON  
UNDO CHANGES  
DONE  
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The speaker size menu allows you to describe the size and number of speakers in your system to the  
GTP-760. The descriptive words LARGE and SMALL that appear in the MAIN field mean the following:  
LARGE:The speaker is full range and capable of reproducing the entire audible frequency spectrum  
20Hz to 20kHz. The GTP-760 sends a full range signal to LARGE speakers without any  
crossover filtering.  
SMALL:The speaker is not capable of reproducing the deepest bass portion of the audible frequency  
range 20Hz to 100Hz. The GTP-760 sends a high-pass filtered signal to SMALL speakers. The filter  
crossover point is 100Hz (12dB/octave). The low frequency information filtered out, the below 100Hz  
part of the signal, is redirected to other full range speakers or the subwoofer.  
For the center, rear and subwoofer fields, the choices ON and OFF appear and mean the following:  
ON: The speaker is active and receives the audio information intended. In addition, although not  
displayed, the speaker is either LARGE or SMALL depending on the configuration of the main speakers  
or subwoofer as described below in the presets.  
OFF: The speaker is inactive. Audio signals intended for speakers set to the OFF position are  
redirected to the main speakers.  
While there are a large number of setup possibilities, ADCOM has provided 3 factory presets that target the  
most typical installations.  
Preset 1 - Main: Small, Center: On, Rears: On, Subwoofer: On  
For the typical home theater system of 2 main speakers, 1 center speaker, 2 rear speakers and a subwoofer,  
factory preset 1 is recommended. In this case, the main, center and rear speakers are all SMALL/high-passed.  
The bass frequencies from each of these 5 channels are redirected to the subwoofer. The 0.1 LFE channel that  
carries the low frequency impact during explosions and other movie soundtrack special effects is also repro-  
duced by the subwoofer. The subwoofer output is limited from 20Hz to 100Hz by a 12dB per octave filter. For  
this preset also, when listening to conventional 2 channel stereo music, the subwoofer reproduces the low  
frequency information of the left and right channels.  
Preset 2 - Main: Large, Center: On, Rears: On, Subwoofer: Off  
When a home theater system does not have a subwoofer, it is assumed that the main speakers are full range  
and can reproduce the low frequency portion of a movie soundtrack. In this case, preset 2 is recommended.  
Here the main speakers are set to LARGE and the center and rears are SMALL/high-passed. The center and  
rear channel low frequency information is redirected to the front channels as is the 0.1 LFE special effects  
channel. In conventional 2 channel stereo playback, the main speakers carry the entire spectrum.  
Preset 3 - Main: Large, Center: On, Rears: On, Subwoofer: On  
A third factory preset allows for user customization of the system. In this mode, the main, center and rear  
channels are all LARGE (full range 20Hz to 20kHz). In addition, the GTP-760 subwoofer crossover is disabled.  
THE GTP-760 SUBWOOFER OUTPUT IS FULL RANGE. In this way, the crossover built in on most active  
subwoofers can be manually set to match the response of the rest of the speakers in the system. The  
subwoofer’s crossover completely dictates the low frequency response of the system. This feature eliminates  
any unintended interaction that might occur between the internal crossover of the GTP-760 and the built in  
crossover of the subwoofer in the other preset modes.  
Using the < and > remote buttons select the preset that best applies to your system or change the speaker  
fields individually as desired. Use the or arrow keys to highlight DONE and press select/play to save you  
choices and return to the SETUP menu.  
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3.4  
CHANNEL BALANCE  
From the SETUP screen, select CHANNEL BALANCE with the or buttons and press select/play.  
You will see:  
CHANNEL BALANCE  
LEFT  
-
-
-
-
-
-
+
+
+
+
+
+
RIGHT  
CENTER  
REAR L  
REAR R  
SUB  
UNDO CHANGES  
DONE  
Each piece of home theater equipment operates differently. In the same system, amplifiers may have different  
gains, speakers may have different efficiencies and, as already discussed, speakers may be positioned in  
different manners relative to the listener. All of these variables can interact to cause the sound from some of  
the speakers to be louder than from others. The CHANNEL BALANCE menu allows the volume of each  
speaker to be individually trimmed so that none of the speakers dominates in playback and detracts from the  
surround illusion. In essence, the CHANNEL BALANCE screen represents today’s balance control.  
The levels in the CHANNEL BALANCE menu may be set in 2 different ways.  
By Ear  
The first method is intuitive and surprisingly precise. Just as you would with a balance control, play a 5.1  
channel movie or music disc. With the CHANNEL BALANCE menu visible, sit in the prime listening position  
and use the < and > arrow to manipulate each channel level so that all speakers are heard, but no speaker  
dominates. If you find that one speaker must be compensated excessively, recheck the connections to that  
speaker. Also, because most subwoofers provide external level controls, it is advised that the subwoofer  
volume control be manipulated first to match the subwoofer to the system. The GTP-760 CHANNEL BALANCE  
menu can then be used to fine tune the subwoofer from the listening position. When satisfied with the settings,  
highlight DONE and press select/play to save your chosen setting and return to the SETUP menu.  
Sound Meter  
The second method requires the use of a sound level meter (also called a sound pressure meter). The Radio  
Shack meter, catalog #33-2050, is commonly employed for this task. Turn the meter on, select the C-weighting  
scale and adjust the range to 70 or 80dB. Place the meter, with microphone pointed upward, at the prime  
listening position as close as possible to ear level. Press the bal. chk button on the GTP-760 remote. The  
BALANCE CHECK menu will appear on the screen and the noise sequencer activates. (This menu essentially  
shows the same information as the CHANNEL BALANCE menu you just saw. Level changes made here are  
reflected in both menus.)Turn up the GTP-760 master volume control while the noise sequencer circulates  
around the 5 channels until the needle on the sound meter deflects and rests at a mid-scale position. As the  
noise sequencer plays through each channel and highlights on the menu, use the < and > remote buttons to  
adjust the level of that channel to the same needle position on the meter. With a few times through the process,  
each channel should play back and set the needle to approximately the same meter reading. Press the  
bal. chk button again to save the settings and defeat the noise sequencer.  
There are 2 things that may be noticed during the channel balance procedure that can cause confusion. First,  
the master volume knob on the front panel of the GTP-760 sometimes moves when setting an individual  
channel trim. The master volume knob marks the level of the loudest channel in the system. If when adjusting  
an individual channel level the knob begins to move, it simply means that the channel being adjusted is now set  
the highest. THEVOLUME OFTHE OTHER CHANNELS DOES NOT CHANGE WHENTHIS HAPPENS.  
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Second, the subwoofer trim appears in the CHANNEL BALANCE menu, but not during the operation of the  
noise sequencer. Because the subwoofer operates at a limited frequency range and because the sound level  
measurement is weighted, the noise sequencer method of channel trimming is often unreliable in setting the  
subwoofer level. Using such an approach can sometimes lead to “pegging” the subwoofer trim to its highest  
level on the GTP-760 to compensate. It is better to use the sequencer to set the level of the main, center and  
rear channels, then use the external volume control on the subwoofer itself to balance it to the system. Fine-  
tuning of the subwoofer level may still be done in the CHANNEL BALANCE menu while listening to a 5.1  
channel soundtrack.  
3.5 INPUT SETTINGS  
Congratulations, your GTP-760 is now fine-tuned and ready for enjoyment. The steps that have been completed  
in sections 3.2 through 3.4 need only be repeated if you change a component in your system or significantly  
alter the position of your speakers. In fact, you should consciously avoid using the CHANNEL DELAYS,  
SPEAKER SIZE or CHANNEL BALANCE menus again during normal operation as you will upset the system  
dependent parameters carefully entered during this procedure.  
While the three setup menus should be avoided, you may elect to use the INPUT SETTINGS menu of the OSD  
during normal operation. Highlight INPUT SETTINGS in the SETUP menu and press select/play on the remote.  
You will see a screen similar to the following:  
INPUT SETTINGS  
INPUT:TUNER  
VIDEO: COMPOSITE  
MODE: 2 CHANNEL  
DIALOG ENHANCE: OFF  
DYNAMIC RANGE:N/A  
LEVELS MENU  
UNDO CHANGES  
DONE  
This screen essentially broadcasts the same information displayed on the front panel of the GTP-760 but in a  
manner that can easily be viewed from the listening position.The available choices in each of the fields can be  
selected with the < and > buttons on the remote control.  
INPUT - identifies the selected input  
MODE - indicates the operating mode of the selected input (stereo, Pro Logic, DTS, Dolby Digital,etc.).  
DIALOG ENHANCE - indicates whether the dialog enhance function is active. Thedialog enhance” feature  
boosts midrange frequencies in the front and center speakers to emphasize dialog intelligibility.  
DYNAMIC RANGE - indicates the level of compression currently selected. (note:This applies only to digital  
inputs receiving a Dolby Digital signal). Choices are Full, 75%, 50% and 25%. The field shows N/A for modes  
when this feature is not available.  
The other two fields, VIDEO and LEVELS MENU, require further explanation.  
The VIDEO field displays the video mode of the selected source. As described in the Composite or S-Video  
box in section 1.2, the GTP-760 can save the video mode for each source. If you have elected to use either all  
composite or all S-Video connections, then there is no reason to change the settings in this field. (In fact it  
should be avoided as doing so may prove confusing. If you inadvertently highlight the VIDEO field and use the  
< or > remote arrow buttons, your screen display and background may disappear from the television. You have  
changed the video mode of the GTP-760 for the selected source. If this happens, without pressing any other  
remote buttons, simply press either of the < or > arrows again and the video screen will reappear).  
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If you have chosen to use a mix of both Composite and S-Video sources, the VIDEO field of the INPUT  
SETTINGS menu is the place to set the mode. In the example from section 1.2, a composite VCR and an S-  
Video DVD are to be used. Select the VCR input of the GTP-760. The VIDEO field should show COMPOSITE.  
Now select the GTP-760 input where the DVD player is connected (DVD, digital 1 or digital 2). Highlight the  
VIDEO field and press either the < or > remote button. The on screen display disappears from your television.  
Without altering anything else on the GTP-760, change your television to its S-Video input (consult your televi-  
sion owner’s manual for directions). The GTP-760 on screen display should reappear, this time with a light gray  
background. TheVIDEO field will now say S-VIDEO. Repeat this procedure for each individual input you wish  
to change.  
The LEVELS MENU selection is not a field but another menu. Highlight LEVELS MENU with the or remote  
buttons and press select/play. You will see the following screen:  
LEVELS MENU  
FRONTS  
CENTER  
REARS  
SUB  
-
-
-
-
+
+
+
+
UNDO CHANGES  
DONE  
The menu shows levels for FRONT, CENTER, REARS and SUB. The bars for each item should be equally  
centered at this time. Inactive channels show not available, N/A.  
The immediate question you might ask, “Why are we looking at channel trims again when we have already set  
this?” There is an important distinction to be made between the LEVELS MENU screen and the menus you  
used to setup the system. The previous screens were used to balance the system due to system and room  
parameters. These things do not often change and therefore should not be changed in the GTP-760. However,  
while playing different movies or music, you may find that fine adjustments are necessary. Perhaps the  
subwoofer on one soundtrack is too quiet while another has loud rear channels. The LEVELS MENU screen  
allows level adjustments to be made WITHOUT effecting the system settings that have been carefully entered.  
Using the < and > buttons on the remote OR using the sub, rear and center up and down buttons on the remote  
changes the displayed settings on the LEVELS MENU screen (the sub, center and rear remote buttons do not  
effect the CHANNEL BALANCE setup screen). In this way, you are free to adjust level trims “on the fly” for  
different soundtracks. If you want to return to your carefully balanced system setup, simply set the bars for  
each field on the LEVELS SETTING screen back to the center/equal positions. If you have not changed the  
CHANNEL BALANCE menu levels or used the noise sequencer since initial setup, then you have returned to  
your default setting and can leave the sound meter in the closet.  
4.0 BASIC OPERATION  
4.1 Operating Mode Selection  
The GTP-760 features several operating modes - DTS, Dolby Digital, Dolby Pro Logic, 5 channel  
stereo, several “enhancement” modes, etc. - designed to present music and movie soundtracks as  
realistically as possible. In addition, some of these modes add the ability to “custom tailor” the GTP-  
760’s spatial presentation to better suit individual tastes.  
You’ll need to understand these modes - DTS, Dolby Digital, Cinema, Dolby Pro Logic, Symphony Hall,  
Stadium, Jazz Club, 5-channel stereo, 2-channel stereo - to get the most out of your GTP-760.  
At first, selecting the proper mode can be confusing, particularly when increasingly popular digital  
formats like DVD present an often-bewildering array of soundtrack options. For this reason, the  
GTP-760 features automatic mode selection (or “Auto Select”) to analyze digital input signals and  
process them properly. (Auto Select works only with digital input signals).  
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When you are using analog inputs, you will probably need to manually select the proper operating mode.  
However, the GTP-760 remembers the mode you’ve most recently used for a particular input and will  
automatically restore that mode when you use that input next, software permitting, of course.  
You can change modes with the menu system or with the surround mode button when you wish.  
The GTP-760’s operating modes are:  
DTS: This mode applies only when a DTS signal is present at the selected digital input (DVD, digital  
1, or digital 2). DTS is an advanced six-channel (5.1) sound format primarily used for movie  
soundtracks, but also some audio only recordings. DTS encoded programming can use  
anywhere from a single channel to six channels during some aspects of a performance to  
deliver the greatest sonic impact. Your GTP-760 will automatically engage the DTS mode if it  
detects a DTS encoded source signal.  
Dolby Digital: This mode applies only when a Dolby Digital signal is present at the selected digital  
input (DVD, digital 1, or digital 2). Contrary to popular belief, Dolby Digital does not always  
imply a discrete 5.1 channel soundtrack. While many DVDs are 5.1 channel encoded, a large  
number have only 2 encoded channels. The GTP-760 automatically detects either case. If the  
front panel Dolby Digital indicatorlights alone, the soundtrack is 5.1 channel encoded. If the  
Dolby Digital indicator and the Dolby Pro Logic indicator light simultaneously, the soundtrack is  
a 2 channel encoded Pro Logic track. Dolby Digital is alternatively called AC-3, an earlier  
designation for this software scheme.  
Cinema: Not an actual mode itself, “cinema” is an equalization (“EQ”) curve designed to reduce  
excessive high frequencies and the consequent harshness sometimes encountered in movie  
soundtracks originally mixed strictly for theatrical release. “Cinema” can be used in conjunction  
with Dolby Digital or Dolby Pro Logic.  
Dolby Pro Logic: This mode is available for all analog inputs and for digital inputs playing standard  
CD audio (PCM). This is the surround mode of choice for most videotapes, surround-encoded  
TV broadcasts, and some music CDs and movie soundtracks.  
Symphony Hall: This mode emulates the expansive space of a typical concert hall and is available  
for all two-channel sources, analog as well as PCM digital. The subwoofer channel is  
not active in this mode.  
Stadium: Again available only for analog and PCM digital sources, this mode re-creates the  
soundfield typical of a large outdoor sporting event with long reverberation times and somewhat  
rolled-off high frequency response. Again, no subwoofer output.  
Jazz Club: An analog and PCM digital source enhancement, this mode simulates the intimacy of a  
very small acoustic space. Again, no subwoofer output.  
5 channel stereo: This makes full use of a home theater speaker system when playing two-channel  
only (analog or PCM digital) sources. It is ideal for parties or any other time when you want to  
get the broadest possible sound distribution from a non-surround encoded source.  
2 channel stereo: The preferred mode for traditional two-channel stereo listening. This mode is  
available for both analog and digital sources. Most multi channel Dolby Digital and DTS signals  
can also be mixed-down into a 2-channel format.  
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4.2 The Tuner  
Selecting stations  
1)  
2)  
3)  
Select the tuner input via the front panel or remote control button. The information display will  
show the most recently received broadcast frequency.  
If the band you want (AM or FM) is already displayed, proceed to step 3) below. If not, push  
the FM/AM selector to change to the appropriate band.  
Choose your preferred tuning method (seek or manual) by pressing the front panel  
seek/manual button.  
While in “seek” mode, the tuning buttons will take you to the next active frequency. In  
“manual” mode, the tuning buttons will step to the next available frequency even if it is unused.  
4)  
Use the tuning buttons to select the station you wish to listen to.  
ProgrammingPresetStations.  
The GTP-760 can memorize up to 14 AM and 14 FM signals for instant recall. Place your favorite  
stations in memory by:  
1)  
Select either FM or AM as described above. Note the stations you want to preset. Starting at  
the lowest end of the frequency range (88.1 for FM, 520 for AM), tune to the first station you  
want to program into memory.  
2)  
Press the preset 1 button and hold it for approximately three (3) seconds. (Remember to push  
the remote’s tuner source selector before using the keypad.) When you see “Preset 1” appear  
in the information display and the LED in the preset 1 button light, that frequency has been  
placed in the preset memory.  
3)  
Tune to the next desired frequency and follow the same instructions but use “Preset 2” to  
commit this new broadcast frequency to memory.  
4)  
5)  
Continue for all presets up to and including the seventh.  
Setting presets 8 through 14 require the use of the shift button.  
Select the desired frequency for preset # 8. Press shift and then hold preset  
button 1 for three seconds.When you see “Preset 8” appear in the information  
display and the LED’s in the front panel preset 1 and shift buttons light, that  
frequency is memorized.  
Select the frequency for preset # 9. Follow the instructions above but  
substitute preset button2 in place of preset button 1. (Remember that the  
shift button adds a “7” to the nominal preset button value. Thus, shift + 2  
actually means “Preset 9” and so on.)  
Continue as above until all 14 presets are used or until you run out of “favorite”  
stations, whichever comes first.  
6)  
Select the other broadcast band (AM or FM) and begin programming again. Follow the  
instructions above. When you’re finished, you’ll be able to listen to any of these favorite  
frequencies by pushing just one or two buttons.  
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Listening toPresetStations  
1)  
2)  
Select tuner and either FM or AM.  
Press the appropriate preset button (or shift + the preset button for choices higher  
than “preset 7”).  
4.3 Room 2 Operation  
Introduction  
The GTP-760’s “Room 2” circuitry gives you the ability to simultaneously enjoy two different audio/video  
sources in two different areas of your home. For instance, you can watch a DVD movie in the main  
family room while someone else enjoys a satellite broadcast or CD in the bedroom.  
OperatingRoom 2” From the Front Panel  
The room 2 button on the front panel of the GTP-760 performs three separate functions:  
Room 2 power ON;Room 2 status;and Room 2 power OFF.  
1)  
2)  
To turn Room 2 power ON, press the room 2 button once. The LED in the center of the  
room 2 button will light to tell you that “room 2” capability is on.  
Once Room 2 is active, press the room 2 button again to display Room 2 status. The LED’s  
in the center of the six front panel analog source selectors will light to show you that you can  
route any of those sources to the GTP-760’s “Room 2” outputs. If one of the six source LED’s  
blinks, that source is already selected for room 2 distribution. (Note:You cannot direct a digital  
source — DVD, digital 1, or digital 2 — to the Room 2 outputs.)  
Choose the source you wish to direct to the room 2 outputs by pushing one of the lighted  
source selectors. The LED’s in the other source selectors will go out and the name of the  
source you’ve just chosen for room 2 distribution will briefly appear in the information display  
window. After five (5) seconds, the display will change to show the room 1 (main) source but  
the room 2 LED will still glow, indicating that a room 2 source is now active.  
You can verify the room 2 source selection any time “room 2” capability is active (i.e., any time  
the room 2 LED is illuminated) by simply pressing the room 2 button again. You’ll see all six  
analog source selector LED’s light. The active room 2 source LED will blink and the name of  
that source will show in the information display. You’ll have ten (10) seconds to change the  
room 2 source by simply pressing any other illuminated source selector.  
3)  
To power Room 2 OFF, press and hold the room 2 button until the red LED at the center of  
the button goes out (about 5 seconds time).  
Setting “Room 2” PlaybackVolume  
You can change “room 2” volume only by using the remote control. There is no way to adjust “room 2”  
playback level from the GTP-760’s front panel alone.  
1)  
Press the remote control’s main source selector once. This makes sure the remote is ready to  
generate GTP-760 command codes.  
2)  
3)  
Press the room 2 button twice to access the room 2 status mode.  
Use the remote control’s volume up/down buttons within ten (10) seconds of pressing  
room 2. The front panel display will show room 2 level changes as you make them and will  
then revert to normal display mode ten (10) seconds after the GTP-760 receives the last  
volume adjust command.  
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Operating Room 2 From “Room 2”  
In addition to the front panel Room 2 controls, the GTP-760 provides an interface for controlling Room 2  
remotely. Such a connection is technically sophisticated and usually intended only for custom  
installations. Please contact your ADCOM dealer or ADCOM directly for further information on these  
advanced features and capabilities.  
5.0 TROUBLE SHOOTING  
Your GTP-760’s circuitry is built around advanced microprocessors. The GTP-760 may exhibit  
occasional anomalies arising from AC line surges, etc. If you experience unexpected behavior,  
or if the GTP-760 “locks up” and does not respond to control input, reset it by turning the front  
power switch off. (Do not use the remote control’s “power” button.) Wait 10 seconds and then  
turn the GTP-760 on. This will reset the internal control circuitry and solve most problems.  
SYMPTOM  
POSSIBLE REASON  
POSSIBLE SOLUTION  
Power LED does not light  
AC Power Cord not plugged in  
AC Fuse failed  
Plug in AC Power Cord  
Replace AC Fuse  
Power LED glows  
but no sound  
Power amp or source unit is not ON  
Make sure whole system is ON  
NoVideo Output  
Video Processor (rear panel) is ON  
Connections in rear of amp are loose  
Move video processor switch to OFF  
Verify all connections on rear of amp  
No sound from one channel  
Input or Output connector  
disconnected or loose  
Verify both connections on that  
channel  
Speaker disconnected  
Verify connection at speaker  
Hum from all speakers  
(any volume)  
Ground loop present  
(difference in ground voltages  
between components)  
If cable TV is present, see Note 1  
If cable TV is not present,  
see Note 2  
A major appliance, dimmer,  
halogen or fluorescent light may be  
creating interference  
Make sure all appliances, dimmers  
and suspect lights are off  
Hum from all speakers  
(increases or decreases with  
change in system volume)  
Problem with source unit (CD, etc.)  
Try different source to verify  
Try different cable to verify  
Problem with cable connecting that  
source to theTuner/pre-amp  
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Note 1: Cable TV systems can contribute to ground loop problems, which in turn, cause “hum.” To determine  
whether your cable system is the contributing factor, disconnect the cable TV incoming signal line (the round, 75  
ohm cable) before it first connects to your system. If the hum disappears, you should insert a “75 ohm Ground  
Loop Isolator” between the cable down lead and your system. Check with your ADCOM Dealer to obtain one. If  
the isolator does not fully cancel the hum, please read Note 2 to complete the troubleshooting procedure.  
Note 2: Make sure that the power amplifier is at least 6" from the Tuner/Pre-amp. Usually, putting another compo-  
nent between these two units is sufficient to minimize the hum. If this does not work, turn the system off and  
disconnect all input cables from the amplifier. Turn the system on again. If the hum persists, your Dealer or  
Service Center should check the amplifier. If the hum disappears, try another set of RCA cables. (Remember to  
turn your entire system off whenever you change cables. You may also need to wait a few moments after  
turning the amplifier off until the power supply discharges to avoid nasty “thumps” when you disconnect or con-  
nect cables.) Connect one RCA cable at a time to see if the hum returns and, if it does, which specific cable is  
responsible. Replace that cable. If the hum persists with any (or all) cables, then your GTP-760 should be  
checked by your Dealer or Authorized Service Center.  
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6.0 CARE, MAINTENANCE, and SERVICE  
CARING FORYOUR GTP-760  
ADCOM has taken great care to ensure your GTP-760 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 panels are powder-coated heavy gauge steel that have been baked to ensure a  
lasting, durable finish. If the front panel, top or sides become dusty or finger printed, they can be cleaned with  
a soft lint free cloth, slightly dampened with a very mild detergent solution or glass cleaner.  
WARNING! Do not spray or pour liquids of any kind on the GTP-760.  
SERVICING  
ADCOM has aTechnical 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. Please have the following information  
readily at hand:the unit’s model and serial numbers;and the dealer from which it was purchased. If your prob-  
lem 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 most accessible to your home.  
Please address mail inquiries to:  
ADCOM Service Corporation  
10Timber Lane  
Phone, Fax or E-mail inquiries to:  
Voice: 732-683-2356  
Fax:  
732-683-9790  
Marlboro, NJ 07746-1444  
USA  
Monday through Friday  
9:00AM to 5:00PM EST/EDT  
UNDER NO CIRCUMSTANCES SHOULDYOUR UNIT BE SHIPPEDTO OUR FACTORYWITHOUT PRIOR  
AUTHORIZATION, OR PACKED IN OTHERTHAN ITS ORIGINAL CARTON AND FILLERS/LINERS.  
For Fax inquires, please include a return Fax or voice telephone number for the reply. When calling or writing  
about your GTP-760, 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 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. For warranty coverage, a  
copy of the original proof of purchase is required. If you have no original copy, please contact your dealer to  
obtain a duplicate copy.  
If the original shipping carton and its fillers have been lost, discarded, or damaged, a duplicate carton may be  
obtained from our Parts Department for a nominal charge.  
Always ship PREPAIDVIA UNITED PARCEL SERVICE (UPS) OR OTHER APPROVED CARRIER. DO NOT  
SHIP VIA PARCEL POST, since the packaging was not designed to withstand rough Parcel Post handling.  
FREIGHT COLLECT SHIPMENTS CANNOT BE ACCEPTED UNDER ANY CIRCUMSTANCES.  
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7.0 SPECIFICATIONS GTP-760  
Preamplifier Section  
Output Level (Rated)................................................................................................1.0V  
Input Impedance.............................................................................................20k Ohms  
Output Impedance...........................................................................................560 Ohms  
Frequency Response  
20Hz to 20kHz..........................................................................+0, -0.5dB  
THD+N@ Rated Output  
At 1 kHz.....................................................................................<_ 0.01%  
IM Distortion  
CCIF @ 15kHz and 16kHz.........................................................<_ 0.009%  
Signal to Noise Ratio (Ref. to 1V)  
“A” Weighted.................................................................................>_ 90dB  
Sensitivity for rated output....................................................................................195 mV  
Subwoofer Low-Pass Output................................................................................100 Hz  
General  
Power (available in 230V on special order).............................................120VAC/50-60Hz  
Chassis Dimensions.......................................4"(102mm) x 17"(432mm) x 11 1/2"(292mm)  
Maximum Dimension................................4 1/4"(108mm) x 17"(432mm) x 12 3/4"(324mm)  
Weight........................................................................................................16lbs. (7.3kg)  
Weight, Packed...........................................................................................19lbs. (8.7kg)  
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10 Timber Lane  
Marlboro, NJ 07746  
Tel: (732) 683-2356  
Fax: (732) 683-9790  
(c) 2000 by ADCOM.  
All rights reserved.  
Printed in the USA GTP-760/v.1.0  
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