Adcom Stereo Amplifier GTP 830 User Manual

GTP-830  
Digital Processing  
Tuner/Preamplifier  
Owner’s Manual  
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A NOTE FROM ADCOM  
Thank you and congratulations on your purchase  
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 IF  
THE CARRIER IS NOT NOTIFIED PROMPTLY, IN  
WRITING, AND IF THE SHIPPING CARTON AND  
PACKING MATERIALS ARE NOT AVAILABLE FOR  
INSPECTION BY THE CARRIER. SAVE ALL PACKING  
MATERIALS UNTIL THE CLAIM HAS BEEN SETTLED.  
of the ADCOM GTP-830 Digital Processing Tuner/  
Preamplifier. The GTP-830 provides Dolby Digital and  
DTS decoding with 7.1 output channels, as well as a 5.1  
analog bypass and the RDS radio data system. These  
features and ADCOM’s legendary quality provide the  
heart of your cutting-edge home theater.  
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-830 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-830, 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.  
*Save the shipping carton and all packing material.  
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® Pro Logic®, and Dolby Digital® are registered trademarks of Dolby  
Laboratories Licensing Corporation.  
Manufactured under license from Digital Theater Systems, Inc. US Patent Number  
5,451,942 and other world-wide patents issued and pending. “DTS,” “dts,” “DTS  
Digital Surround,” are trademarks of Digital Theater Systems, Inc. Copyright 1996  
Digital Theater Systems, Inc. All Rights Reserved.  
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IMPORTANT SAFETY INSTRUCTIONS  
WARNING: To reduce the risk of fire or electric shock,  
impede the flow of air through its ventilation openings.  
do not expose this appliance to rain or moisture.  
The unit should be situated away from heat sources  
and open flames such as radiators, heat registers, stoves,  
or other devices (including amplifiers) that produce heat.  
ATTENTION: Pour ev` iter tout risque de feu ou choc el` ectrique,  
ne pas exposer cet appareil a` la pluie ou a` l'humidite.`  
AVIS: Risque de choc electrique- ne pas ouvrir.  
`
The unit should be connected to a power-supply  
outlet only of the voltage and frequency marked on  
its rear panel.  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
Care should be taken so that objects do not fall, and  
liquids are not spilled, into the enclosure openings.  
Warning: To reduce the risk of fire or electric shock,  
do not expose this unit to rain or moisture.  
If necessary, the user should consult the dealer or  
an experienced radio/television technician for addi-  
tional 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, D.C., 20402, Stock No. 004-000-00345-4.  
Read all the safety and operating instructions before  
connecting or using this unit.  
Retain this notice and the owner’s manual for future  
reference.  
All warnings on the unit and in the operating  
instructions should be adhered to.  
Even when the light of the switch is off, some parts  
of the appliance may still be under hazardous live  
potential.  
Outdoor Antenna Grounding  
If any outside antenna is connected to your tuner or  
tuner-preamplifier, be certain the antenna system is  
grounded so as to provide some protection against  
voltage surges and built-up static charges. Section  
810 of the National Electrical Code, ANSI/NFPA No.  
70-1984, provides information with respect to proper  
grounding of the mast and supporting structure,  
grounding of the lead-in wire to an antenna dis-  
charge unit, size of the grounding conductors,  
location of the antenna dis-charge unit, connection  
to grounding electrodes, and requirements for the  
grounding electrode.  
Do not use this unit near water: for example, near a  
bathtub, washbowl, kitchen sink, laundry tub, in a  
wet basement, or near a swimming pool.  
Do not place any object filled with liquids, such as  
vases, on the unit.  
The AC power cord should be routed so that it is  
not likely to be walked on or pinched, especially  
near the plug, convenience receptacles, or where  
the cord exits the unit.  
The AC power cord should be unplugged from the  
wall outlet when the unit is to be unused for a long  
period of time.  
a. Use No. 10 AWG (5.3 mm 2 ) copper, No. 8 AWG  
(8.4 mm 2 ) aluminum, No. 17 AWG (1.0 mm 2 ) copper-  
clad steel or bronze wire, or larger, as a ground wire.  
This unit should be serviced by qualified service  
personnel when:  
b. Secure antenna lead-in and ground wires to  
house with standoff insulators spaced 4-6 feet (1.22-  
1.83 m) apart.  
—The power cord or plug has been damaged; or  
—Objects have fallen or liquid has been spilled,  
into the unit; or  
c. Mount antenna discharge unit as close as possi-  
ble to where lead-in enters house.  
—The unit does not appear to operate normally,  
or exhibits a marked change in performance; or  
—The device has been dropped, or the enclosure  
damaged.  
d. Use jumper wire not smaller than No. 6 AWG  
(13.3 mm 2 ) copper, or the equivalent, when sepa-  
rate antenna-grounding electrode is used. See NEC  
Section 810-21 (j).  
All warnings on the unit and in its operating instruc-  
tions should be adhered to.  
Note to CATV system installer:  
This reminder is provided to call the CATV system  
installer’s attention to Article 820-22 of the National  
Electrical Code that provides guidelines for proper  
grounding and, in particular, specifies that the cable  
ground shall be connected to the grounding system  
of the building, as close to the point of cable entry  
as practical.  
The unit should be installed so that its location or  
position does not interfere with its proper ventila-  
tion. For example, it should not be situated on a  
bed, sofa, rug, or similar surface that may block the  
ventilation openings; or placed in a built-in installa-  
tion, such as a bookcase or cabinet, that may  
4 | ADCOM OWNER’S MANUAL  
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SAFETY NOTIFICATION PAGE  
power lines  
ground clamp  
service entrance  
conductors  
standoff  
insulators, b  
mast  
antenna  
lead-in wire  
service  
entrance  
equipment  
ground wire, a,b  
ground clamps  
antenna  
discharge  
unit, c  
to external antenna  
terminals of radio receiver  
power service grounding  
electrode system  
ground wire, a,b  
ground clamps  
(e.g. interior metal water pipe)  
bonding jumper, d  
optional antenna grounding  
electrode driven 8 feet (2.44 M) into  
the earth if required by local codes.  
Any outdoor antenna must be located  
away from all power lines.  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
This “Lightning Flash with  
Arrowhead” symbol is  
Caution To prevent electri-  
cal shock, do not use the  
polarized plug with an exten-  
sion cord or receptacle, or  
other outlet, unless the  
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.  
intended to alert the user of  
the presence of uninsulated  
“dangerous voltage” within  
the product’s enclosure that  
may be of sufficient magni-  
tude to constitute a risk of  
electric shock to persons.  
blades can be fully inserted  
to prevent blade exposure.  
ADCOM OWNER’S MANUAL | 5  
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GTP-830 CHECKLIST  
GTP-830 Tuner/Preamp  
GTP-830 Remote Control  
with Batteries  
GTP-830 Owners Manual  
and Warranty  
ADCOM Power Cord  
Video 5 input cover  
FM Antenna/Balun Adapter  
6 | ADCOM OWNER’S MANUAL  
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TABLE OF CONTENTS  
A Note from ADCOM  
3
3
The ADCOM Protection Plan  
Unpacking your GTP-830  
Safety Information  
3
4-5  
6
GTP-830 Checklist  
1.0 Product Features  
8
9
1.1 Front Panel Controls  
1.2 Rear Panel Inputs & Outputs - System Connections  
1.3 The Remote Control  
14  
20  
2.0 Installing/Connecting the GTP-830  
2.1 Physical Placement  
29  
29  
29  
2.2 Connecting Source Components to the GTP-830  
3.0 Initial Setup  
30  
30  
30  
31  
32  
34  
35  
3.1 The On Screen Display  
3.2 Channel Balance  
3.3 Channel Delays  
3.4 Speaker Settings  
3.5 Surround Speaker Placement  
3.6 Input Setting  
4.0 Trouble Shooting  
36  
38  
39  
5.0 Care, Maintenance, and Service  
6.0 Specifications  
ADCOM OWNER’S MANUAL | 7  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
[02]  
[05]  
[01]  
[03]  
[07]  
[06]  
[08]  
[04]  
[05]  
D
I
G
I
T
A
L
volume  
display  
up  
G
T
P
-
8
3
0
FM mute/high blend  
memory  
tune/preset  
down  
CD  
tape monitor  
ext 5.1  
video 3  
AM  
FM  
phones  
video  
L audio R  
s-video  
bass  
treble  
surround backs  
video 1  
video 2  
video 4  
video 5  
surround mode  
video 5 in  
[09]  
[10]  
[11]  
[12]  
[13]  
[01] Power button  
[02] Display button  
[03] FM Mute/High Blend button  
[04] Memory button  
[05] Tuner Up/Down buttons  
[06] Tune/Preset button  
[07] Display window  
[08] Volume knob  
[09] Headphone Output and  
Video 5 inputs  
[10] Surround Backs button  
see page 34 for backs placement  
[11] Input Selector buttons  
[12] Surround Mode button  
[13] Bass/Treble controls  
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PRODUCT FEATURES  
1.1 Front Panel Controls  
[02] Display button:  
The GTP-830 supports RDS PS and RDS RT. With  
stations carrying RDS information, “RDS” will light  
up in the display panel, and the station’s RDS name  
is automatically displayed (RDS PS).  
The GTP-830’s front panel is a model of simplicity.  
All controls are logically grouped for easy, intuitive  
operation. Familiarize yourself with the preceding  
diagram and read the short explanations of each  
feature below. When you finish, you will be well on  
your way to enjoying the GTP-830’s convenience  
and sound quality.  
Some radio stations, which support RDS, also  
transmit additional information, known as Radio  
Text (RDS RT). To view this information, use the  
Display button.  
With stations carrying RDS information, the Display  
button scrolls between three different display  
modes, each successive push of the button engages  
the next one of the three modes:  
[01] Power button:  
Depress the Power button to switch the preamplifier  
to its ‘Stand-by’ mode. The amber LED in the power  
button will light up. On the front panel, press any of  
the input selector buttons [11] to switch the pream-  
plifier on. From the remote control, press the power  
button [25] to switch the unit on (see remote dia-  
gram, page 20). The display will light up indicating  
which input was selected and the power button  
LED will turn red.  
a) In the default mode, the station’s RDS name is  
displayed, Program Service (PS; normally the  
station’s calling letters, WXYZ, for instance).  
b) From the default mode, press the button once to  
view Radio Text (RT). This can be additional infor-  
mation such as the presenter’s or program’s name;  
what song is playing, etc. This text scrolls continu-  
ously over the 8 alphanumeric display segments. It  
takes a few seconds for the tuner to gather the RT  
information, so immediately after tuning to a station  
and selecting to view RT the display will indicate  
“NO TEXT” and default to the station name. If no  
RT information is available, the display will also  
show “NO TEXT” for three seconds before revert-  
ing to the default mode.  
Pressing the Power switch again will turn the unit  
OFF completely. The GTP-830 preamplifier uses a  
memory back-up system to store surround sound  
trim settings and preset station information for the  
tuner section. This information is retained for  
several weeks, even if the unit is switched off  
completely or unplugged.  
Press the Remote Control Power button [25] to  
switch the unit from operating to Stand-by mode  
and vice versa. Press this button again to switch to  
unit on from Stand-by; the last selected source will  
be indicated in the display.  
c) Press the Display button from the RT mode to  
display the station frequency. Press again to return  
to the default mode (a).  
When the Display button is pressed when tuned  
to a non-RDS station, the display will show “NO  
NAME” for three seconds before reverting to the  
default display.  
The Power Button LED will light up amber when the  
preamplifier is switched On, but in Stand-by mode.  
NOTE:  
The Display button also has a secondary function:  
When pressed and held for three seconds, the front  
panel display will dim. Press and hold the button  
again to turn the display off, and again to set the  
display back to its original brightness.  
In Stand-by mode the GTP-830 uses very little power.  
However, it is recommended that you switch the unit  
completely off if it is not going to be used for more  
than a couple of days. Switch off completely by  
pressing the Power button on the front panel. All  
lights will extinguish. When the GTP-830 is plugged  
into the wall current may still be flowwing into the  
transformer. Only when the GTP-830 is unplugged is  
all current into the device stopped.  
ADCOM OWNER’S MANUAL | 9  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
is pressed within 10 seconds, “MEMORY” will stop  
flashing and the preamplifier will default to its  
previous state.  
[03] FM Mute/High Blend button:  
This button combines two functions; it switches the  
tuner from Stereo to Mono and disengages the  
muting circuitry at the same time. The muting cir-  
cuit will mute the tuner in between radio stations  
when searching or tuning to avoid tuning noise.  
Press the Down/Up [05] buttons to select which  
Preset number you wish to assign to the station  
(from 1 to 30 on FM and 1 to 10 on AM), shown as  
a flashing number in the Display Panel, and then  
press Memory [04] again. The Memory light in the  
Display Panel will go out and the station is now  
stored in your GTP-830’s memory.  
However, very weak radio station signals may be  
suppressed by the muting circuit. If such a very  
weak station is in stereo it will have a high level of  
background hiss. Switching to Mono Mode and  
disengaging the muting circuit by depressing the  
FM Mute/High Blend button will allow the station to  
be heard and will cancel most or all of this back-  
ground noise.  
To exit the Memory mode without storing a station,  
leave all the tuner controls untouched; the Memory  
mode will automatically cancel itself after 10 sec-  
onds. The Memory Presets have a memory back-up,  
so they will remain stored for several weeks even if  
the Preamplifier is switched off or unplugged from  
the main supply.  
In normal operation the mute circuit is engaged,  
and the display indicates “FM MUTE.” Press the FM  
Mute/High Blend button to disengage the muting  
circuit and switch from stereo to mono reception.  
“FM MUTE” will extinguish in the display. Also,  
“STEREO” will extinguish if a stereo broadcast was  
received. Press the FM Mute/High Blend switch  
again to return to Auto Stereo FM operation.  
NOTE:  
You can enter a new station into an unused Preset or  
overwrite an existing programmed Memory Preset. By  
doing this you will replace the radio station previously  
held on that Preset number.  
In combination with the Memory button [04] a  
preset number can be emptied.  
Deleting a stored Preset:  
You can empty a Preset by deleting the stored  
information:  
[04] Memory button:  
•Select the Preset to be emptied.  
The Memory button is used to store stations into  
the Preset Memory (1-30 Presets on FM, 1-10  
Presets on AM), used in conjunction with the  
Down/Up [05] buttons on the front panel. When  
Memory is active, the Preset number flashes and  
the red “MEMORY” indicator is shown in the  
Display Panel. If no other button is pressed within  
10 seconds “MEMORY” will stop flashing and the  
preamplifier will default to its previous state.  
•Press the Memory button [04], followed by the FM  
Mute/High Blend button [03]. The Preset will then  
be deleted and ‘—’ appears as the Preset number.  
[05] Tuner Up/Down buttons:  
The function of these buttons depends on the tun-  
ing mode selected with the Tune/Preset button [06].  
The Tune/Preset button toggles between the two  
operation modes:  
a) Preset mode (indicated in the display area): Press  
the Down button to scroll to a lower number Preset;  
press the “ Up” button to scroll to a higher Preset  
number. This is a “wrap-around” function, so that  
going from the highest number Preset, the tuner  
will go to the lowest Preset number or vice-versa  
when tuning either up or down.  
To Store a Preset:  
Tune to the radio station you wish to enter into a  
Preset. If the station is transmitting RDS informa-  
tion, the RDS indicator will light up and station  
initials will be shown in the Display Panel.  
If a non-RDS station is found, then just the frequency  
will be shown.  
b) Tune mode: Press the “Up” or “Down” button  
for more than 1/2 second to engage automatic tun-  
ing respectively up or down the frequency band.  
The tuner will search automatically for the first  
To store that station as a Preset, press Memory  
[04]. “MEMORY” and the preset section in the  
display panel will start to flash. If no other button  
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PRODUCT FEATURES  
reasonably strong radio station, where it will stop.  
Press the Down/Up button again for 1/2 second to  
start searching again.  
by “MUTING” flashing in red in the display area.  
Press Mute again to restore sound. Mute does not  
affect recordings made using the Tape, Video 3 and  
Video 4 outputs but does affect the signal going to  
the Preamp Outputs.  
NOTE:  
Automatic tuning is available on both FM and AM.  
[09] Headphone Output and Video 5 inputs:  
A 1/4” stereo jack socket is provided for headphone  
listening and will work with conventional head-  
phones of any impedance. The volume and tone  
controls are operative for headphone listening.  
Use a suitable adapter to connect headphones with  
other types of connectors such as 3.5mm stereo  
‘personal stereo’ jack plugs. Inserting a headphone  
will automatically turn off the signals from the  
Preamp Outputs, and set the listening mode to Stereo.  
NOTE:  
The sound from the ext 5.1input is not available on the  
headphones socket.  
REMEMBER:  
Listening at high levels can damage your hearing.  
The video five input is located on the front panel to  
simplify connection of a camcorder or a video game  
console. To select video five, push the correspon-  
ding front panel button in the input selector section.  
By briefly tapping the Down or Up buttons you can  
engage manual tuning respectively down or up the  
frequency band for precise tuning to a specific fre-  
quency. With each successive tap of the keys, the  
tuner will take 0.05 MHz steps on FM so you can  
accurately tune into the desired frequency. For AM  
the tuning steps are factory set at 10 kHz.  
This tuning mode can also be useful when trying to  
receive a radio station which is too weak for the  
auto search mode. When tuned accurately to a  
station, “TUNED” will light up in the display.  
[06] Tune/Preset button:  
The Tune/Preset button toggles between the Preset  
and Tune mode. When Preset mode is selected,  
“PRESET” lights up in the display area.  
Refer to the Tuner Up/Down button [05] description  
for more information.  
[07] Display window:  
[10] Surround Backs button:  
The display area shows all vital information when  
the unit is operational.  
Pressing this button toggles the Surround Back  
channels on and off. The Surround Back channels  
work in conjunction with the Surround Rear chan-  
nels to provide a more engaging and enveloping  
listening experience. Due to the varying nature of  
film soundtracks and music, you may prefer to acti-  
vate or deactivate the Surround Backs. For example,  
Dolby Digital 5.1 and DTS soundtracks benefit most  
from the addition of Surround Back channels, since  
they provide discrete rear channels. Pro Logic  
soundtracks, on the other hand, provide a mono  
surround track, which yields a less satisfying experi-  
ence when using the Surround Backs.  
[08] Volume knob:  
The Volume control adjusts the overall loudness of  
the signals being fed to the preamplifier outputs.  
Unlike conventional controls, the GTP-830’s volume  
control doesn’t have a start or end position. Volume  
can also be adjusted from the remote control using  
the Master Volume Up or Down buttons [29]. The  
Volume control does not affect recordings made  
using the Tape, Video 3 and Video 4 outputs but will  
affect the signal going to the Preamp Outputs. The  
volume level is indicated in the display panel when  
it is being adjusted, and after three seconds the dis-  
play defaults to its previous status. Volume setting  
can range from -61dB to +18dB.  
The level of the Surround Back channels can be  
adjusted in the same manner as the other channels,  
either through the On-Screen-Display  
(OSD) or with the Bal. or Test  
On the remote control, press the  
Mute button [27] to temporari-  
ly switch off the sound to the  
Preamp outputs and head-  
phones. Mute mode is indicated  
functions from the remote con-  
trol. Be sure to experiment to find  
the balance that best suits your taste.  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
selected; in the display the “DIGITAL 3” indicator  
[11] Input Selector buttons:  
will start to blink. If a digital audio signal is detect-  
ed, the “DIGITAL 3” indicator will stop blinking and  
remain lit. If no digital audio signal is detected,  
“DIGITAL 3” indicator will cease blinking and  
extinguish, and the analog inputs will be used.  
These buttons select the active video and audio  
input for the GTP-830 and the audio signal sent to  
the Preamp Outputs, Tape, Aux Outputs, Video 3 &  
4 and TV monitor outputs. Video inputs 1, 2 and 3  
also select the Digital Inputs 1, 2 and 3, respectively.  
Video 5: For an easy and temporary connection you  
can connect a camcorder (playback only) or video  
game console using the Video 5 front panel input. If  
the game console or camcorder is mono, connect  
the audio lead to the R (Right) audio socket.  
Video 1: Video 1 selects the signal from a  
TV/Satellite/Cable receiver or DVD player connected  
to Video 1 as the active input.  
The Digital Input 1 [22] is linked to the Video 1  
input. Digital Input 1 allows for connection of a digi-  
tal source with an optical digital output. Whenever  
Video 1 is selected, Digital Input 1 will also be  
selected; in the display the “DIGITAL 1” indicator  
will start to blink. If a digital audio signal is detect-  
ed, the “DIGITAL 1” indicator will stop blinking and  
remain lit. If no digital audio signal is detected,  
“DIGITAL 1” indicator will cease blinking and  
extinguish, and the analog inputs will be used.  
ext 5.1: Selects the multi-channel output signal from  
a DVD player or external decoder source (such as  
DVD-Audio) connected to the ext 5.1 input as the  
active input.  
NOTE:  
No ext 5.1 audio signal is available from the head-  
phones socket, or the Tape, Video 3 or Video 4 outputs.  
Tape Monitor: Selects the output from a tape  
recorder when playing back tapes or monitoring  
recordings being made through the Tape sockets.  
Press the Tape Monitor button once to select it and  
again to return to the normal input selection.  
Video 2: Video 2 selects the signal from a  
TV/Satellite/Cable receiver or DVD player connected  
to Video 2 as the active input.  
The Digital Input 2 [22] is linked to the Video 2  
Input. Digital Input 2 allows for connection of a digi-  
tal source with a coaxial digital output. Whenever  
Video 2 is selected, Digital Input 2 will also be  
selected; in the display the “DIGITAL 2” indicator  
will start to blink. If a digital audio signal is detect-  
ed, the “DIGITAL 2” indicator will stop blinking and  
remain lit. If no digital audio signal is detected,  
“DIGITAL 2” indicator will cease blinking and  
extinguish, and the analog inputs will be used.  
The Tape Monitor function does not override the  
current input selection that is sent to the tape out-  
puts. When the Tape Monitor is selected, you are  
listening to the signal that is coming back into the  
Tape Input jacks. The currently selected source is  
still being sent to the Tape Out where it can be  
recorded. This function enables you to check on a  
recording that you are making without affecting the  
recording process. When Tape Monitor is selected,  
the button will remain lit until Tape Monitor is  
disengaged again.  
Video 3 & Video 4: Video 3 & 4 select the signal  
from a TV/Satellite/Cable receiver, DVD player or  
VCR connected to Video 3 or Video 4 as the active  
input. The Video 3 & 4 inputs also have video and  
analog audio outputs specifically for recording  
video devices.  
CD: Selects the CD as the active input.  
AM: Selects AM radio. AM is also automatically  
selected when an AM Preset is selected.  
FM: Selects FM radio. FM is also automatically  
selected when an FM Preset is selected.  
The Digital Input 3 [22] is linked to the Video 3  
input. Digital Input 3 allows for connection of a digi-  
tal source with a coaxial digital output. Whenever  
Video 3 is selected, Digital Input 3 will also be  
[12] Surround Mode button:  
With the Surround Mode button the available sur-  
round sound modes can be selected. The selected  
surround mode is permanently indicated in the dis-  
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PRODUCT FEATURES  
play area and is also shown for 3 seconds in the  
large text section of the display. The Surround  
Mode button scrolls through the available surround  
sound modes when pressed repeatedly. The  
surround modes are:  
total: Left, Center, Right, Surround Left, Surround  
Right and an “Effects Channel” (Subwoofer). With  
either Dolby Digital 5.1 or DTS digital input, the  
Stereo, Dolby Pro Logic and Hall surround modes  
cannot be selected.  
The Dolby Digital signal allows for several channel  
configurations. Most two-channel Dolby Digital  
recordings will allow the Pro Logic listening mode  
to be applied.  
Stereo: The Stereo mode provides straight two  
channel listening. With an analog source, it bypasses  
all processing. With a digital input, only the bass-  
management filtering is applied.  
[13] Bass/Treble controls:  
Pro Logic: Dolby Pro Logic decodes the center and  
surround sound signals embedded in stereo movie  
sound tracks from video, Laser Disc or TV. To  
decode correctly, the source must be a Dolby  
Surround or Dolby Stereo soundtrack.  
The GTP-830 is fitted with Bass and Treble tone  
controls to adjust the overall tonality of your sys-  
tem. The 12 o’clock position is ‘flat’ with no boost  
or cut and a detent indicates this position.  
Hall: In the Hall Surround mode, a realistic level of  
ambiance is added to a normal stereo source such  
as a CD or FM radio.  
Rotate the control clockwise to increase the  
amount of Bass or Treble. Rotate the control count-  
er-clockwise to decrease the amount of  
Bass or Treble. These controls affect the Left and  
Right Front channels. The Tone controls do not  
affect recordings made using the Tape or Video  
line outputs.  
With any of the Digital Inputs 1, 2 & 3 (press Video  
1, 2 or 3 respectively to select), the GTP-830 auto-  
matically recognizes if the selected source carries a  
Dolby Digital™ or DTS™ signal. Dolby Digital and  
DTS have six independent channels available in  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
[14]  
[15]  
[16]  
[17]  
[23]  
preamp outputs  
aux-out  
monitor out  
video  
antenna  
AM  
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R
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s-video  
front  
WARNING: To reduce the risk of fire or electric shock,  
do not expose this appliance to rain or moisture.  
Model:GTP-830  
Power Rating:  
10TimberLane  
Marlboro  
N.J.07746USA  
120V 60Hz  
ATTENTION: Pour ev` iter tout risque de feu ou choc el` ectrique,  
ne pas exposer cet appareil a` la pluie ou a` l'humidite.`  
230V 50Hz  
Powerconsumption: 50W max  
R
audio  
L
ear  
gnd  
FM  
AVIS: Risque de choc el` ectrique- ne pas ouvrir.  
out  
Manufactured under license from Digital Theater  
Systems, Inc. US Pat. Number 5,451,942 and other  
world-wide patents issued and pending. “DTS”,  
“DTS Digital Surround”, are trademarks of Digital  
Theater Systems, Inc. Copyright 1996 Digital  
Theater Systems, Inc. All rights reserved.  
video 4  
in  
back  
CAUTION  
sround  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
center  
sub  
Manufactured under license from Dolby  
Laboratories License Corporation.  
“Dolby”, “AC3”, “Pro Logic” and the double-D  
symbol are trademarks of  
Dolby Laboratories Licensing Corporation.  
Copyright 1992 Dolby Laboratories, Inc.  
All rights reserved.  
out  
video 3  
tape  
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L
out  
front  
digital audio in  
in  
12v DC trigger  
R
L
sur  
110 V  
230 V  
video 2  
in  
in  
in  
center  
sub  
video 1  
video 2  
video 3  
video 1  
in  
serial #  
R
L
R
L
cd  
ext 5.1 in  
audio  
video  
s-video  
[20]  
[21]  
[18]  
[24]  
[22]  
[25]  
[19]  
[14] Antenna connections  
[15] Preamp outputs  
[16] Auxiliary outputs  
[17] Monitor outputs  
[18] Video/Analog Audio  
inputs and outputs  
[19] Tape inputs and outputs  
[20] CD Analog inputs  
[21] External 5.1 Analog inputs  
[22] Digital Audio inputs  
[23] AC power cord  
[24] 12v DC Trigger Out  
[25] Voltage switch  
note: not all units have  
this feature.  
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PRODUCT FEATURES  
1.2 Rear Panel Inputs & Outputs -  
System Connections  
[14] Antenna connections:  
AM Antenna: An AM loop antenna is supplied with  
the GTP-830 and is required for AM reception. Open  
the clip terminal lever and insert the wire from the  
antenna. Closing the lever will lock the wire in  
place. Test various positions for the antenna, but  
always ensure the loop is placed vertically for best  
reception. Placing the antenna close to large metal  
items such as metal shelves or radiators may inter-  
fere with reception.  
Like the front panel, the GTP-830’s rear panel is  
carefully arranged to make hookup, configuration,  
and use as simple as possible. However, the  
GTP-830’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 proba-  
bly answer most of your questions about interfac-  
ing the GTP-830 with other components in  
your system.  
NOTE:  
When reception is not satisfactory using the supplied  
AM loop antenna alone, connection of an external  
antenna is recommended. The antenna cable to the  
loop antenna must not exceed three meters.  
FM Antenna: A ribbon wire FM antenna is included  
and should be connected to the FM connector at the  
rear of the unit using the ‘balun’ adapter supplied.  
The ribbon aerial should be mounted on a vertical  
surface and placed so that it forms a ‘T’.  
antenna  
AM  
Note that the GTP-830’s RCA-style jacks have color-  
coded centers to make connections easier. Use this  
key to help route cables properly:  
gnd  
FM  
RED centers = RIGHT CHANNEL ANALOG  
AUDIO inputs  
WHITE centers = LEFT CHANNEL ANALOG  
AUDIO inputs  
YELLOW centers = VIDEO inputs (composite)  
Experiment with placement of the antenna to find  
the position that gives the best signal strength and  
lowest background noise. An inadequate FM signal  
normally results in high levels of hiss, especially in  
stereo, and interference from external electrical  
sources. In areas of poor FM reception, the tuner  
section’s performance can be improved by using an  
externally mounted FM antenna. A qualified aerial  
installer will be able to advise and fit a recommend-  
ed aerial for your reception conditions.  
BLACK centers = DIGITAL AUDIO inputs and  
CENTER CHANNEL and  
SUBWOOFER inputs and outputs  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
The video signal available on the S-Video and Video  
[15] Preamp outputs:  
Composite outputs is dependent on the selected  
video input (Video 1, Video 2, Video 3, Video 4,  
Video 5). However, when one of the audio-only  
sources is selected (FM, AM, CD, Tape Monitor or  
ext 5.1) the last selected video signal from one of  
the video inputs will be present on these outputs.  
This way you can watch a DVD player or video  
while listening to the CD player.  
Before making any connections, check that the  
GTP-830 and the power amplifiers it will be con-  
nected to are switched off. Connect the RCA-to-RCA  
leads from the Front Left and Right, Center,  
Surround Rear Left and Right, and  
preamp outputs  
Surround Back Left and Right  
Preamp Outputs to your external  
amplifiers. The Subwoofer preamp  
output allows for connection to a  
sub-bass speaker system with its  
own external or integrated power  
amplifier (“active” or “powered”  
subwoofers).  
R
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front  
ear  
[18] Video/Analog Audio inputs and outputs:  
Apart from the audio signal, these inputs will also  
accept a video signal which will be routed to the  
Monitor Out sockets [17] for a television or video  
projector. The Video 1, 2 and 3 inputs also have the  
option of a Video Composite connection (using the  
yellow RCA socket) or an S-Video connection (using  
the Mini-Din connector).  
back  
sround  
center  
sub  
With volume turned down to a low  
level, switch power on only after  
all connections have been made.  
The S-Video standard allows for higher quality  
video signal transfer when compared to the Video  
Composite standard. If your video components  
have an S-Video connector use dedicated S-Video  
leads to connect them to the GTP-830 in the same  
way as described with the Video Composite equivalents.  
[16] Auxiliary outputs:  
The auxiliary outputs allow  
a line level connection to  
various devices, such as an  
audio system in another  
aux-out  
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room. The output is the selected source.  
A video signal fed to an S-Video input socket will be  
available on both the S-Video Monitor Out and  
Video Composite Monitor Out.  
[17] Monitor outputs:  
Composite Video and S-Video outputs are for  
connecting a TV or Video Monitor to view video  
sources connected to Video 1 through Video 5.  
Using a Video RCA-to-RCA lead or S-Video, connect  
the ‘Video Line In’ on the TV or monitor to the  
MONITOR OUT.  
R
audio  
L
out  
video 4  
in  
Note that an S-Video signal from Video input 1  
through 3 will also be available as a Video  
Composite signal on Monitor out, if the correspon-  
ding source is selected. The composite video input  
signals from Video 1 to 5 ( [18]; yellow sockets) will  
also be available as S-Video signal on the Monitor  
Out socket. If you use both S-Video and Video  
Composite sources, you will only need to connect  
the S-Video Monitor Out to the television or projector.  
out  
video 3  
in  
video 2  
in  
monitor out  
video  
s-video  
video 1  
in  
R
L
audio  
video  
s-video  
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PRODUCT FEATURES  
Video 1 & Video 2 (Audio): Inputs for the audio  
[20] CD Analog inputs:  
playback and video signal from a video device such  
as a stereo TV, DVD player, satellite cable TV receiv-  
er or a Laser Disc. Using twin RCA-to-RCA leads,  
connect to the left and right ‘Audio Out’ of the video  
device to these inputs. Using a single RCA-to-RCA  
lead (Video Composite) or S-Video lead, also con-  
nect the video output of the video device. Video 1 &  
Video 2 can be used for video playback only. Use  
Video 3 or Video 4 if you want to connect a VCR for  
recording and playback through the GTP-830.  
Input for CD player (analog audio  
signal) or other line-level signal  
source. Use a twin RCA-to-RCA lead  
to connect the CD player’s left and  
right ‘Audio Outputs’ to this input.  
in  
R
L
cd  
[21] External 5.1 Analog inputs:  
Inputs for the multi-channel audio signals from an  
external decoder, such as an SACD or DVD-Audio  
player with integrated decoder. Use two twin RCA-  
to-RCA leads to connect the decoder’s front left and  
right ‘Audio Outputs’ to the Front left and right  
inputs, and the decoder’s Surround left and right  
outputs to the Surround left and right inputs. Use a  
The optical Digital Input 1 [22] is linked to the  
Video 1 input. Select Video 1 to hear a source  
connected to Digital Input 1.  
The coaxial Digital Input 2 [22] is linked to the  
Video 2 input. Select Video 2 to hear a source  
connected to Digital Input 2.  
third twin RCA-to-RCA lead to connect the decoder’s  
subwoofer output to the Subwoofer input and the  
decoder’s Center channel  
Video 3 & Video 4 (Audio): Connections for the  
audio recording and playback to a VCR or other  
video recorder. Using twin RCA-to-RCA leads, con-  
nect to the left and right ‘Audio Out’ of the VCR to  
the Video 3 or Video 4 IN connectors for playback.  
Connect the left and right ‘Audio In’ of the VCR to  
the Video 3 or Video 4 OUT connectors for record-  
ing. Using a single RCA-to-RCA (Video Composite)  
lead or S-Video lead, also connect the video output  
of the VCR to Video In (only Video Composite for  
Video 4) for Video playback. Connect the Video  
Input of the VCR to Video Out of the GTP-830 pre-  
amplifier for recording of video signals. Refer also  
to the description of S-Video and Video Composite  
above in the Monitor output description [17].  
output to the Center channel  
fornt  
input. Make sure to follow  
color coding of the plugs to  
ensure that both Center and  
Subwoofer are connected  
correctly; for instance, use  
the red plugs at either end to  
connect the center channel  
and the white plugs for the  
subwoofer channel.  
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sru  
center  
sub  
ext 5.1 in  
[22] Digital Audio inputs:  
The GTP-830 has three digital audio inputs to allow  
for connection of DVD, CD or other digital sources.  
Digital Audio Input 1 allows for connection of a digital  
source with an optical output. Use a cable terminated  
with a TOS Link connector. This digital input is  
linked to the Video 1 input.  
[19] Tape inputs and outputs:  
Connections for analog recording and playback to  
an audio tape recorder of any type, such as a cas-  
sette, reel-reel, DAT, MD or CD-R. Using twin RCA-  
to-RCA leads, connect to the left and right ‘Audio  
Output’ of the tape machine  
tape  
Digital Audio Inputs 2 & 3 allow for connection of a  
digital source with a coaxial digital output. Use a  
cable with the proper impedance, specifically  
designed for the transfer of digital signals. These  
R
L
to the TAPE IN connectors for  
playback. Connect the left and  
right ‘Audio Input’ of the tape  
machine to the TAPE OUT  
connectors for recording.  
out  
digital inputs are linked  
respectively to Video 2  
and Video 3.  
digital audio in  
in  
video 1  
video 2  
video 3  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
NOTE:  
[23] AC power cord:  
We strongly recommend the use of our surge sup-  
presser/ line conditioners, the ADCOM ACE family of  
products, for systems with substantial amplifiers and  
many source components. The ACE products relieve  
the GTP-830 from handling large current surges, while  
they protect your entire system by filtering and condi-  
tioning 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.  
After you have completed all connections to the  
amplifier, plug the AC line cord into a “live”  
wall socket.  
[24] 12v DC Trigger:  
To facilitate remote turn-on and turn-off of other  
components (power amplifiers, for example), this  
2.5mm mini-jack provides a constant signal (12  
volts DC) whenever the GTP-830 is fully powered.  
When the GTP-830 is turned off  
(via the front panel switch) or  
12v DC trigger  
placed in standby mode (via the  
“power” button on the remote  
control), the jack has no output.  
[25] Voltage switch:  
The GTP-830 can be configured for either 120 or 230  
volt operation using this switch. Note not all units  
have this feature. See your dealer or contact  
ADCOM for more details  
110 V  
230 V  
regarding the operation  
of this switch.  
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PRODUCT FEATURES  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
[24] Source selectors  
[25] Power button  
[26] Input selectors  
G T P - 8 3 0  
[27] Mute button  
[51]  
[24]  
main  
vid 4  
vid 1  
vid 5  
vid 2  
tuner  
vid 3  
CD  
[28] d. range (dynamic range) button  
[29] Volume Up/Down buttons  
[30] Mode button  
[27]  
[29]  
power  
mute  
[25]  
[31] Play button  
volume  
mode  
tape  
stop  
ext5.1  
d.range  
[32] Pause button  
[26]  
[33]  
[28]  
[30]  
[35]  
[33] Stop button  
setup  
[34] Arrow buttons  
[35] Select button  
select  
[34]  
[32]  
[36] Direct Access Keypad  
[37] Test button  
[31]  
[37]  
[38]  
pause  
play  
[38] Bal (balance check) button  
[39] Backs button  
1
4
2
5
8
0
3
6
9
test  
bal  
[40] Repeat button  
[39]  
[41]  
[40]  
[43]  
[36]  
[41] Random button  
[42] Tuning Up/Down buttons  
[43] Pre/Tune button  
[44] RDS button  
7
backs  
repeat  
+10  
random  
AM pre/tune  
[45]  
[46]  
FM  
RDS  
tuning  
[42]  
[44]  
[45] AM button  
[46] FM button  
m1  
m2  
m3  
m4  
[47] M1, M2, M3, M4 (Macro Keys)  
[48] Sleep button  
[47]  
[48]  
[49]  
sleep  
backlight  
dim  
[50]  
[49] Backlight button  
[50] Dim button  
[51] Main button  
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PRODUCT FEATURES  
to reenter the main remote page. The dim button  
will now again change the GTP-830 display.  
1.3 The Remote Control  
The GTP-830 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 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, and with important  
GTP-830 functions such as volume saved under  
each page.  
The ADCOM universal remote controller is preset  
to operate all GTP-830 functions (MAIN and TUNER  
device mode) and most GCD-700/750 CD functions  
(CD device mode).  
Eight Source Select Buttons  
Alkaline batteries are recommended for maximum  
operating life. Four AAA (R 03) batteries should be  
fitted in the battery compartment at the rear of the  
remote control. When replacing batteries, check that  
they have been put in correctly, as indicated on the  
base of the battery compartment.  
The single most important aspect to master about  
the GTP-830 remote control is the function of the  
eight source select buttons at the top of the remote.  
These are the buttons labeled [51] and [24] in the  
figure on the opposite page. Each of these buttons  
cause two things to happen when used. First, they  
select the corresponding input on the GTP-830.  
Second, THESE KEYS REMAP ALL OF THE OTHER  
BUTTONS ON THE REMOTE CONTROL. You can  
think of each of these buttons as having a page of  
commands associated with it. Some buttons, such  
as volume up and down, are preprogrammed to  
operate the GTP-830 for each source. These buttons  
can be “written over” if you like, but default to GTP-  
830 operations for your convenience.  
Remote Features  
[24] Source selectors (vid 1, vid 2, vid 3, vid 4,  
vid 5, tuner, CD, tape, ext 5.1):  
These buttons serve two functions.  
• First, they switch inputs on the GTP-830 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 CD device selector, the remote’s play button  
generates a command code for your DVD player. If  
you then press the vid 5 device selector, the same  
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 pro-  
grammed the remote in the first place. This will be  
covered shortly.)  
Most of the GTP-830 remote commands are saved  
under the main remote page. Whenever you desire  
to control the GTP-830 via remote, you must first  
ensure the main page is active. As an example,  
press [51] main on the remote control. Now, press  
the dim button. If your GTP-830 is on, the bright-  
ness of the front panel display changes. Notice also  
that the main button on your remote illuminates.  
This serves as a reminder that the main remote  
page is currently active. Now press the CD button  
and then the play button. Notice now that the CD  
source button lights. The CD remote page is now  
active. If you have an ADCOM CD player, this com-  
mand 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 prepro-  
grammed in the CD remote page. If your GTP-830 is  
on you will also notice the display does not respond  
to this command. Press the [51] main button again  
[25] Power button:  
In all modes, this is preprogrammed to turn the  
GTP-830 on and off.  
[26] Input selectors (tape, ext 5.1):  
In main mode, these are similar to the source selec-  
tors described above but they switch only GTP-830  
inputs. They DO NOT automatically change the  
functions of other remote buttons.  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
Pressing repeatedly will cycle through Pro Logic,  
[27] Mute button:  
Hall, and Stereo, when available. Refer to the  
Surround Mode description [12] for more  
information.  
In all modes, this button is preprogrammed to mute  
outputs of device. Mute does not affect recordings  
made using the Tape outputs but will affect the  
signal going to the Preamp Outputs. When the unit  
is in mute mode, any adjustment of the Volume  
Control on the front panel [08] will release the mut-  
ing, i.e. the original volume level will be resumed.  
[31] Play button:  
In CD mode, it is preprogrammed for play with an  
ADCOM CD player.  
[32] Pause button:  
[28] d.range (dynamic range) button:  
In main mode, this button is preprogrammed to  
adjust dynamic range of Dolby Digital encoded  
sources.  
In CD mode, it is preprogrammed to pause an  
ADCOM CD player.  
[33] Stop button:  
In CD mode, it is preprogrammed to stop an  
ADCOM CD player.  
The d. range button, which can be used only in  
combination with a Dolby Digital source, incremen-  
tally reduces the audio track’s dynamic range in  
four steps (100%, 75%, 50% and 25%) to allow for  
comfortable listening under a variety of conditions.  
The normal or default position is 100%. To adjust  
the dynamic range, each consecutive press of the  
d. range button will reduce the value in 25%  
increments, as shown in the alpha-numeric  
display section.  
[34] Arrow buttons:  
The arrow buttons allow navigation throughout the  
GTP-830 OSD (On Screen Display) menus (as well  
as the menus of other devices, once the commands  
are learned). Please refer to section 3.1 for further  
explanations on the OSD.  
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.  
Although we usually prefer to reproduce a source’s  
full dynamic range (the difference between very  
loud and very soft sounds), it may occasionally be  
desirable to reduce the dynamic range. For exam-  
ple, when playing a movie late at night, loud explo-  
sions might wake sleeping family members. Simply  
turning the volume control down would probably  
make a whisper in the next scene inaudible. The  
d. range button solves this dilemma by progressive-  
ly lowering the volume of loud peaks while  
In CD mode, it is preprogrammed for audible  
reverse scan with an ADCOM CD player.  
Up arrow/Setup: In main mode, this is prepro-  
grammed to enter the OSD menu system, as well  
as scroll up to the next choice on a menu screen.  
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.  
increasing the level of softer sounds.  
In CD mode, it is preprogrammed for audible  
forward scan with an ADCOM CD player  
[29] Volume Up/Down buttons:  
In all modes, these buttons change the master  
volume setting of the GTP-830. In all modes except  
main, they can be reprogrammed with new com-  
mands. The Volume control does not affect record-  
ings made using the Tape and Video, or Tape, Video  
3 and Video 4 outputs but will affect the signal  
going to the Preamp output.  
Down arrow: In main mode, this is preprogrammed  
to scroll down to the next choice on a menu screen.  
[35] Select button:  
In main mode, this is preprogrammed to enter a  
selection chosen via the menu system.  
[36] Direct Access Keypad (buttons “1”  
through “10,” and “+10”):  
In CD mode, buttons are preprogrammed as track  
access commands for the ADCOM CD player.  
[30] Mode button:  
In main mode, this is preprogrammed to cycle  
through the surround modes of the GTP-830.  
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[37] Test button:  
Pressing the test button engages the test signal  
[43] Pre/Tune button:  
In main and tuner modes, this button toggles  
generator to allow for adjustment of all speaker lev- between manual tuning and preset station functions  
els, so that each channel can be adjusted for equal  
loudness at your listening position. The test signal  
cycles automatically with 3-second intervals from  
Front Left, Center, Front Right, Rear Right, Back  
Right, Back Left, Rear Left, to Subwoofer in continu-  
ous cycles. If an adjustment in setting is made for  
one of the channels, cycling will pause for 3 sec-  
onds after the adjustment was made. Both display  
panel and OSD show which speaker is being fed  
with the test signal. Use the cursor down and up  
buttons to respectively decrease or increase the  
level for the current speaker. Press the test button  
for the tuning up and down buttons [42].  
[44] RDS button:  
In main and tuner modes, cycles through the RDS  
functions of the tuner. Refer to the Display button  
description [02] for more information about RDS.  
[45] AM button:  
In main and tuner mode, buttons are prepro-  
grammed to select the AM band.  
[46] FM button:  
In main and tuner mode, buttons are prepro-  
again to leave or cancel the test mode, any changes grammed to select the FM band.  
will be memorized automatically.  
[47] M1, M2, M3, M4 (Macro Keys):  
[38] Bal (balance check) button:  
In main mode, button is preprogrammed to initiate  
balance check procedure.  
These buttons are programmable for use with any  
source.  
[48] Sleep button:  
Even when the GTP-830 is correctly set-up, it may  
sometimes be desirable to make minor adjustments  
to suit the material you are listening to. Pressing the  
bal button allows for direct adjustment of Center,  
Surround, and Subwoofer levels. Press the bal  
button to scroll to the next speaker. Both display  
panel and OSD show which channel can be adjust-  
ed. Use the Down and Up arrow buttons to respec-  
tively decrease or increase the level for the current  
channel.  
Press sleep to make the GTP-830 automatically  
switch off after a preset number of minutes.  
Pressing the sleep button once will set the sleep  
time to 90 minutes, after which the GTP-830 will  
automatically switch off into Standby mode. Sleep  
mode is shown on the Display Panel. To adjust the  
Sleep Delay, press the sleep button, each  
consecutive press will reduce the sleep time in 30-  
minute increments, as shown in the Display Panel.  
To cancel the sleep mode, continue pressing the  
sleep button until the sleep time returns to 0 min-  
utes. Pressing the power on the front panel [01] or  
stand-by button will also cancel the sleep mode.  
[39] Backs button:  
In all modes, this button is preprogrammed to  
toggle on and off the Surround Back speakers.  
[40] Repeat button:  
[49] Backlight button:  
In CD mode, this button is preprogrammed as  
“repeat” command for ADCOM CD player.  
No programming capabilities. Button  
backlights all keys for eight (8) seconds when  
pressed.  
[41] Random button:  
In CD mode, this button is preprogrammed as “ran-  
dom” command for ADCOM CD player.  
[50] Dim button:  
In main mode, button is preprogrammed to dim  
GTP-830’s information display.  
[42] Tuning Up/Down buttons:  
In tuner mode, these buttons are prepro-  
grammed to scan up or down the GTP-830’s  
AM or FM band.  
[51] Main button:  
In all modes, button provides access to the  
GTP-830. For instance, to turn on the test  
tone generator first push [51] the main  
button, then push [37] the test button.  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
NOTES:  
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!  
Direct sunlight or very bright ambient lighting may  
affect the operating range and angle for the remote  
control handset.  
The infrared remote control command receiver, locat-  
ed to the right of the Power button, receives com-  
mands from the remote control. There must be a clear  
line-of-sight path from the remote control to this win-  
dow; if that path is obstructed, the remote control  
may not work.  
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-830  
function, under CD to see what CD commands are  
preprogrammed, and under TUNER to see all  
preprogrammed tuning functions.  
Remote Function Table  
BUTTON  
FUNCTION  
Main  
CD  
Tuner  
All Others  
MAIN  
Selects Main  
Selects Main  
Selects Main  
Selects Main  
VID 1  
Selects Video 1  
Selects Video 2  
Selects Video 3  
Selects Video 4  
Selects Video 5  
Selects Tuner  
Selects CD  
Selects Video 1  
Selects Video 2  
Selects Video 3  
Selects Video 4  
Selects Video 5  
Selects Tuner  
Selects CD  
Selects Video 1  
Selects Video 2  
Selects Video 3  
Selects Video 4  
Selects Video 5  
Selects Tuner  
Selects Video 1  
Selects Video 2  
Selects Video 3  
Selects Video 4  
Selects Video 5  
Selects Tuner  
VID 2  
VID 3  
VID 4  
VID 5  
TUNER  
CD  
Selects CD  
Selects CD  
POWER  
MUTE  
VOLUME UP  
Power On/Off & Macro Power On/Off  
Power On/Off  
Power On/Off  
Mute Volume  
Mute Volume  
Mute Volume  
Mute Volume  
Master Volume Up  
Master Volume Up  
Master Volume Up  
Master Volume Down  
Programmable  
Programmable  
Programmable  
Programmable  
Surround Mode Select  
Master Volume Up  
Master Volume Down  
Programmable  
Programmable  
Programmable  
Programmable  
Surround Mode Select  
VOLUME DOWN Master Volume Down Master Volume Down  
TAPE  
Selects Tape  
Programmable  
Programmable  
EXT 5.1  
D. RANGE  
STOP  
Selects Ext 5.1  
Dynamic Range adjust Programmable  
Not programmable  
Stop CD  
MODE  
Surround Mode Select  
Surround Mode Select  
continued on opposite page.  
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PRODUCT FEATURES  
Remote Function Table  
BUTTON  
FUNCTION  
Main  
CD  
Tuner  
All Others  
PAUSE  
Not programmable  
Not programmable  
Not programmable  
OSD Right Select  
OSD Scroll Down  
OSD Left Select  
Pause CD  
Play CD  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Surround Backs On/Off  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
For Macro Use  
For Macro Use  
For Macro Use  
For Macro Use  
Sleep  
PLAY  
SETUP/UP  
Programmable  
Skip Ahead  
Programmable  
Skip Back  
Programmable  
Track 1  
RIGHT  
DOWN  
LEFT  
SELECT  
OSD “Enter” Select  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Test Tone On/Off  
1
2
Track 2  
3
Track 3  
4
Track 4  
5
Track 5  
6
Track 6  
7
Track 7  
8
Track 8  
9
Track 9  
0
Track 10  
+10  
+10  
TEST  
BAL  
Programmable  
Programmable  
Selects Channel Trims  
BACKS  
REPEAT  
RANDOM  
AM  
Surround Backs On/Off Surround Backs On/Off Surround Backs On/Off  
Not programmable  
Not programmable  
Not programmable  
Not programmable  
Selects Presets/Tuner  
Enables RDS  
Repeat Current Track Programmable  
Random Play  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
Programmable  
For Macro Use  
For Macro Use  
For Macro Use  
For Macro Use  
Sleep  
Programmable  
Selects AM  
FM  
Selects FM  
PRE/TUNE  
RDS  
Selects Tune/Preset  
Enables RDS  
Tuning UP  
TUNING UP  
Tuning Up  
TUNING DOWN Tuning Down  
Tuning Down  
For Macro Use  
For Macro Use  
For Macro Use  
For Macro Use  
Sleep  
M1  
For Macro Use  
For Macro Use  
For Macro Use  
For Macro Use  
Sleep  
M2  
M3  
M4  
SLEEP  
BLACKLIGHT  
DIM  
Backlights All Buttons Backlights All Buttons Backlights All Buttons  
Dims Display Programmable Programmable  
Backlights All Buttons  
Programmable  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
NOTE:  
Programming your ADCOM GTP-830  
Remote Controller  
You can program new commands over the prepro-  
grammed commands in tuner and CD if you wish.  
However, you cannot program any buttons, even those  
unprogrammed with GTP-830 command codes, while  
you’re in main mode. This safety feature assures you  
that you will always be able to fully enjoy the GTP-830’s  
capabilities.  
The ADCOM universal remote controller operates  
eight different audio/video components. As you’ve  
already seen, it’s preprogrammed to control  
ADCOM’s GTP-830 Preamp/Tuner and the GCD-700/750  
CD players. In addition, it has seven “component  
memory banks” available so you can program the  
remote to learn commands for your DVD player,  
satellite box, laser disc player, VCR, etc. This lets you  
use one remote controller for your entire system.  
Programming Your 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 com-  
mands 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 Video 1  
source, press the vid 1 source selector first. You can  
“teach” your remote new commands for any func-  
tion button ( except backlight) after you’ve selected  
vid 1, vid 2, vid 3, vid 4, vid 5, tuner, or CD.  
Using Preprogrammed Commands  
Using the remote controller’s preprogrammed com-  
mands is simple. For most GTP-830 functions (vol-  
ume up/down, changing surround modes, etc.),  
follow these easy steps.  
1. Press the main source selector button. This tells  
the remote that you want to use GTP-830 prepro-  
grammed commands. The main button will flash  
red to tell you it understands.  
2. Press the appropriate function button (volume  
up, volume down, etc..) If you’ve selected a button  
that actually triggers a GTP-830 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.  
1. Place the source component’s remote “head to  
head” with the ADCOM remote. They should be in  
line with each other about 2 to 3 inches apart.  
2. Press the ADCOM remote’s appropriate source  
selector and select buttons simultaneously. Hold  
both buttons until the status LED turns orange and  
the source selector button glows red. Both  
indicators should remain lit.  
(Review the table above to see which buttons are  
preprogrammed.)  
For tuner functions (changing stations, etc.):  
3. Decide which function button on the ADCOM  
remote you want to learn a new command. Press it.  
The orange status LED will begin to flash and the  
source selector LED will go out.  
1. Press the tuner source selector button. It will  
flash red.  
2. Press the tuning up (or tuning down) function  
button to change stations. The tuner source selector  
will flash red to confirm that the function button  
you’ve selected actually triggers a command.  
(Again, use the table to see which buttons are  
preprogrammed.)  
4. 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.  
Press the CD source selector first to access prepro-  
grammed commands for ADCOM CD players.  
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PRODUCT FEATURES  
5. Verify that the ADCOM remote has learned the  
then flash green twice and turn to a constant  
orange, indicating that all the learned information  
for the device mode selected has been erased.  
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.  
3. To exit this feature, press and hold the ADCOM  
remote’s source selector and select buttons simulta-  
neously. The orange status LED and the source  
selector button will flash twice and then  
turn off.  
Repeat Steps 3 through 5 for any other commands  
you want to teach your ADCOM remote for that  
source component.  
Deleting all the Programmed Commands for every  
Source Component  
Save the commands you’ve just programmed into  
the ADCOM remote by pressing and holding the  
appropriate source selector and select buttons  
simultaneously. Hold until the status LED and  
source selector LED flash twice and then go out.  
Repeat these steps for any other source commands  
you wish to program.  
NOTE:  
This procedure erases every programmed command  
accessed under the selected vid 1, vid 2, vid 3, vid 4,  
vid 5, tuner, and CD input selectors. Make sure you  
really want to do this before following the step below.  
1. Press and hold the VID 5 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.  
Deleting (clearing) Individual Programmed  
Commands  
1. Press the ADCOM remote’s source selector and  
select buttons simultaneously and hold until the  
orange status LED and the source selector button  
glow steadily.  
All LEDs will then turn off, indicating that every  
learned command in the ADCOM remote has been  
erased.  
2. Press the function button you wish to clear. The  
status LED will flash continuously.  
Macro Commands  
“Macro” commands are simply a series of individ-  
ual commands initiated by pushing just one button.  
3. Press the backlight button. The status LED will  
then flash green twice and then revert to steady  
orange. The source selector button will continue to  
glow.  
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.  
Repeat steps 2 and 3 for any other command you  
wish to delete for the same source component.  
4. Exit “delete mode” by pressing and holding the  
source selector and select buttons simultaneously.  
The orange status LED and the source selector  
button will turn off.  
For macro programming purposes, think of the  
source selectors as being in two groups: main, vid1,  
vid 2, and vid 3 in Group 1; vid 4, vid 5, tuner, and  
CD 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 command series, you can initiate it  
whenever you’re in main, vid 1, vid 2, or vid 3  
modes. Similarly, you will program “Group 2”  
macros by pushing vid 4 first and can use  
them whenever the vid 4, vid 5, tuner, or CD  
inputs are active.  
Deleting all the Programmed Commands for one  
Source Component  
1. Press the ADCOM remote’s source selector and  
select buttons simultaneously and hold until the  
orange Status LED and the source selector button  
turn on and remain lit.  
2. Press and hold down the backlight button.  
The red Status LED and the Device button  
will flash five times, the Status LED will  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
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 m1 button is pressed IF  
main, vid 1, vid 2, or vid 3 sources are selected at  
the time you select that macro. If you’ve pro-  
grammed a Group 2 macro, it will send out an iden-  
tical command sequence whenever vid 4, vid 5,  
tuner, or CD inputs are selected.  
Programming Macro Initiator Buttons:  
1. Press either the Group 1 or Group 2 source selec-  
tor button (main or vid 4 respectively) and the mute  
button simultaneously. Hold both buttons until the  
red status LED and the input selector button remain  
lighted.  
2. Press the macro initiator button (power, m1, m2,  
m3 or m4) you wish to program.  
3. 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 selec-  
tor button (main or vid 4 respectively) and the mute  
button simultaneously. Hold both buttons until the  
red status LED and the input selector button remain  
lighted.  
2. Press the macro initiator button (power, m1, m2,  
m3 or m4) you wish to delete.  
3. Press the tuning up button. The red status LED  
and input selector button will blink twice to confirm  
deletion of the macro.  
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INSTALLING/CONNECTING THE GTP-830  
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-830 (and other audio/video components)  
away from moisture and out of direct sunlight.  
Bear in mind that the GTP-830’s rear panel is the  
central connecting point for almost every compo-  
nent in your audio/video system. Leave sufficient  
room behind the rear panel to accommodate  
cables, antenna leads, power cords, etc. We recom-  
mend a minimum of 5 inches of free space behind  
the GTP-830 for maximum flexibility.  
A distance of 1/2" should be maintained around the  
GTP-830 for ventilation. Keep your GTP-830 in a  
room where temperatures remain fairly moderate,  
and never cover it with table cloths, curtains, news-  
papers, etc., to avoid potential overheating.  
2.2 Connections  
Section 1.2 above has already provided the infor-  
mation 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.  
allow 5" of  
clearance  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
What this section is all about . . .  
Select is used to choose the desired option.  
Otherwise, highlight EXIT and press Select to leave.  
After connecting your home theater, you may elect  
to configure the GTP-830 to the specific speaker  
arrangement and dimensions of your system. The  
procedures described in this section demonstrate  
how to use the GTP-830’s on screen display to enter  
this information. Once complete, the GTP-830  
stores this information so that these tasks need only  
be repeated if speakers are changed or substantially  
repositioned.  
The OSD menus are at maximum two “layers”  
deep; this means that from the main menu (layer 1)  
you can select a sub menu (layer 2).  
3.2 Channel Balance  
The output levels of each of the speakers connected  
to the GTP-830 may need to be adjusted so that  
there is an even balance of sound from all the  
speakers in the system. If, for instance, the relative  
volume level to the Left and Right speakers and the  
Center speaker is set too low, most of dialogue may  
be difficult to follow. If, on the other hand it is set  
too loud, the overall balance will sound unnatural.  
3.1 On Screen Display (OSD)  
The GTP-830 is equipped with an elaborate On  
Screen Display facility (OSD). As the OSD is an  
essential tool to set up the various parameters  
for Surround sound correctly it is recommended  
that you connect your monitor or television to  
the GTP-830.  
To adjust the channel balance the GTP-830 is  
equipped with a Test button [37] to help assess the  
loudness levels of each speaker. Before adjusting  
Depending on your source and/or the television sys- the channel balance level make sure the master  
tem used you must first select the correct video sys- volume is turned down to a normal listening level.  
tem. If the OSD rolls over the screen you must  
Pressing the Test button engages the Test signal  
select another system: PAL or NTSC.  
generator to allow for adjustment of all speaker  
While pressing the Memory button [04] on the front levels, so that each channel can be adjusted for  
panel, press the Video 1 input selector button [11]  
repeatedly until the desired system is shown in the  
display area. The OSD can be engaged by pressing  
one of the four cursor buttons on the remote  
control. The SETUP Menu will appear as below:  
equal loudness at your listening position. The test  
signal scrolls automatically with 3 second intervals  
from Left, Center, Right, Rear Right,Back Right, Back  
Left, Rear Left, to Subwoofer in continuous cycles.  
If an adjustment in setting is made for one of the  
channels, scrolling will stop until 3 seconds after  
the adjustment was made. Both the display panel  
and OSD show which speaker is being fed with the  
test signal. Use the Left and Right arrow buttons  
to increase or decrease the level for the current  
speaker.  
SETUP  
1 INPUT SETTINGS  
2 CHANNEL BALANCE  
3 CHANNEL DELAYS  
4 SPEAKER SETTINGS  
5 EXIT  
The Channel Balance for each speaker can be  
adjusted in 1dB increments. (The back channels are  
adjusted in 2 dB increments.) Continue to calibrate  
the level for each speaker until equal loudness is  
achieved at your listening position. A more accurate  
adjustment can be made using a sound level meter,  
if available. Set the meter to “Slow” and “C-weight-  
ed” modes and re-check the settings with the meter  
placed in several different positions in the general  
listening area.  
Use the cursor buttons on the remote control to  
navigate, select the desired menu and options, then  
press Select [35] to access. The Up and Down  
arrow buttons are used to navigate and select an  
option (indicated by highlighting the available  
option). The Left or Right arrow buttons are used to  
change a setting from the highlighted section, and  
Select the channel for which you wish to adjust and  
set the level so that it matches the other channels.  
For best results, start with the Left channel set at  
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INITIAL SETUP  
0dB and to match the other channels to it.  
Highlight SAVE & EXIT and press Select to save the  
settings and return to the SETUP menu.  
Normally, if the Right speaker is located at the  
same distance from the listening position to the  
Left speaker it should be set at the same level as  
the Left speaker.  
The Channel Balance menu can also be accessed  
directly with the bal button [38] on the remote control.  
3.3 Channel Delays  
Press the Test button again to leave or cancel the  
Test mode; any changes will be memorized  
automatically.  
For the best surround sound performance it is  
important that sound from all speakers reach the  
listener’s ears at the same time. Because the sur-  
round/rear speakers are usually closer to the listen-  
er than the front speakers, there is a tendency for  
the ear to localize sounds to the rear, because the  
ear takes most notice of the sounds that arrive at  
the head first. Similarly, the center speaker is often  
closer to the listener than the front left and right  
speakers. To compensate for this, the GTP-830 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.  
NOTE:  
There is no output in the Subwoofer during noise  
sequencer operation; therefore it is difficult to adjust  
the level in test mode. The Subwoofer level can be  
adjusted in the OSD setup menu with musical input.  
After setting the balance with the Test function, you  
may wish to make further adjustments by ear,  
depending on the material you are listening to.  
There are two ways to access the Channel Balance  
screen, which allows you to adjust levels while  
monitoring a source.  
Highlight CHANNEL BALANCE in the SETUP menu  
and press Select on the remote. You will see a  
screen similar to the following:  
Each millisecond corresponds approximately with  
1 foot or 30.5 centimeters.  
To set the center channel delay time:  
Call up the SETUP menu of the On Screen Display.  
Select the Channel Delays menu:  
CHANNEL BALANCE  
LEFT  
:
0dB  
0dB  
0dB  
0dB  
0dB  
0dB  
0dB  
0dB  
CENTER:  
RIGHT :  
REAR R :  
BACK R :  
BACK L :  
REAR L :  
CHANNEL DELAYS  
CENTER:  
N/A  
SURROUNDS  
: N/A  
SUB  
:
DO NOT SAVE AND EXIT  
SAVE AND EXIT  
The GTP-830 allows the volume of each speaker to  
be individually trimmed so that none of the speak-  
ers dominates in playback and detracts from the  
surround illusion.  
DO NOT SAVE AND EXIT  
SAVE AND EXIT  
Choose CENTER and select the desired delay time  
(1, 2, 3, 4 or 5ms).  
Highlight the speaker you wish to adjust, using the  
Up and Down arrow buttons. Use the Left arrow  
button to lower the output level, and the Right  
arrow button to raise the output level. Each speaker  
can be adjusted within a -10 to +10dB range, in  
steps of 1dB. The back channels can be adjusted  
within a -60 to +10 dB range, in steps of 2dB.  
To set the surround channel delay time:  
Use the Up or Down arrow buttons [34] to highlight  
the Surrrounds.  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
Scroll through the preset delay time options and  
In rare system setups, the center channel speaker is  
select the desired time.  
actually further away than the front left and right  
speakers. In these cases, set the center channel  
delay to 0ms. The center channel delay time adjust-  
ment is only available in Dolby Digital surround  
mode.  
When both delays have been entered, choose  
“SAVE & EXIT” to save the settings and return to  
the Main Menu.  
In Dolby Digital surround mode, the rear channel  
delay time can be set from 0ms to 15ms with 1ms  
increments. The center channel can also be delayed  
up to 5ms, in 1ms steps.  
Now, measure the distance from the listening posi-  
tion to either the left or right rear speaker. Subtract  
the rear speaker distance from the front speaker dis-  
tance. The resulting distance is equivalent to the  
delay in milliseconds for the rear delay setting. For  
example, if your rear speaker distance is 6 feet (1.8  
m) and the front distance is 12 feet (3.7 m), the cor-  
rect rear channel delay setting is 6 milliseconds.  
Again, set the rear channel delay to 0ms if the rear  
channels are further from the listening position than  
the front speakers.  
In Dolby Pro Logic surround mode, the rear channel  
delay time can be set from 15ms to 30ms and 1ms  
per step.  
For other modes, the channel delay time cannot  
be adjusted.  
Determining Delay Values:  
3.4 Speaker Settings  
Four modes are available to the GTP-830’s setup:  
On or Off, and Large or Small.  
surround  
rear left  
front left  
The On mode is used when the speaker is present.  
The Off mode is used when a speaker is not pres-  
ent. Front speakers are assumed to be present, so  
they cannot be turned off. Center, Surround, and  
Subwoofer speakers are optional, and these are the  
speakers you must describe to the GTP-830. Audio  
signals intended for speakers which are not present  
are redirected to the main speakers.  
surround  
back left  
center  
surround  
When a speaker is On, it can be set as Large or  
Small. The Large mode is used when the speaker is  
full range and capable of reproducing the entire  
audible frequency spectrum from 20Hz to 20kHz.  
The Small mode is used when the speaker is not  
capable of reproducing the deepest bass portion of  
the audio frequency 20Hz to 100Hz. When a speaker  
is set to small, the low frequencies intended for that  
speaker are redirected either to the Front speakers  
or the Subwoofer.  
back right  
front right  
surround  
rear right  
Measure the distance from the listening position to  
the center speaker and to one of the front speakers.  
Subtract the center channel distance from the front  
left or right channel distance. For example, if the  
front speakers are 12 feet (3.7 m) from the listening  
position and the center speaker is 10 feet (3.0 m),  
the difference is 2 feet (0.6 m). For this example the  
center channel delay is set to 2 milliseconds or ms.  
For best results, you should consider using a center  
speaker. Ideally it should be the same type as the  
left and right speakers. Using a separate center  
channel speaker will allow the dialogue to cut  
through even the biggest sound effects and musical  
scores. Having the sound spread across three front  
speakers also stabilizes the stereo image, making  
the usable listening area much bigger.  
The GTP-830 can delay the center channel output  
up to 5 milliseconds and thus compensates for cen-  
ter channel speakers that are up to 5 feet (1.5 m)  
closer to the listening position than the front left  
and right speakers.  
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INITIAL SETUP  
Installing surround speakers will greatly enhance  
Preset 1: Main - LARGE; Center - LARGE; Surround -  
the surround experience as these add considerably  
to the overall “ambiance.” Dolby Pro Logic encoded  
material is deliberately limited in dynamic range  
and frequency bandwidth for the surround channel  
and thus only requires speakers of far lesser capa-  
bilities compared to the front channels. Dolby  
Digital, however, is a full range system with two  
independent surround channels and with dynamics  
equal to that of the front channels. For this reason it  
is advisable to choose loudspeakers which are simi-  
lar in power handling and performance capability to  
those of the front channels. If you are using only  
one pair of surround speakers, make sure to con-  
nect them to the Surround Rear outputs. If you  
choose to install another pair of surround speakers,  
locate them behind your listening position, and con-  
nect them to the Surround Back outputs. Surround  
Back channels add to the spaciousness and coher-  
ence of the sound field, but the Surround Rear  
channels must be present for the desired effect.  
LARGE; Subwoofer - ON  
In this mode, all speaker channels are large, i.e. full  
range, and the home theater system has a sub-  
woofer. This preset is particularly useful for large  
rooms.  
Preset 2: Main - LARGE; Center - SMALL; Surround  
- SMALL; Subwoofer - OFF  
This preset is necessary for a home theater system  
that does not have a subwoofer. The bass frequen-  
cies from the center and surround channels are  
redirected to the main speakers.  
Preset 3: Main - SMALL; Center - SMALL; Surround  
- SMALL; Subwoofer - ON  
This preset is ideal for those systems using 5 small  
speakers combined with a subwoofer. The bass  
frequencies from each of these 5 channels are  
redirected to the subwoofer.  
Many film soundtracks rely heavily on very low fre-  
quency sound effects which are difficult for normal  
or smaller hi-fi speakers to reproduce. To faithfully  
reproduce these low frequencies you can use a  
specially designed low frequency loudspeaker with  
its own built-in amplifier (“active subwoofer”).  
Because it is difficult to hear which direction very  
low frequencies are coming from, you only normally  
need one subwoofer and this can be placed virtual-  
ly anywhere in the room. Dolby Digital uses a  
dedicated Low Frequency Effects (LFE) channel. If a  
subwoofer has been selected, the LFE channel will  
be fed to the subwoofer output.  
NOTES:  
Regardless of the available main speakers, select  
Preset 2 when subwoofer is not available to redirect  
bass frequencies to the main speakers.  
The Surround settings affect both the Surround Rear  
and Surround Back speakers.  
SPEAKER SETTINGS  
PRESET :  
MAIN : LARGE  
CENTER: LARGE  
SURROUND : LARGE  
SUBWOOFER : ON  
1
First you need to indicate which speakers are pres-  
ent in your system. Besides the Main speakers (Left  
& Right), these can include a Center, two Surround  
Speakers and a Subwoofer.  
Call up the SETUP menu of the On Screen Display.  
Select the SPEAKER SETTINGS.  
DO NOT SAVE AND EXIT  
SAVE AND EXIT  
Highlight PRESET and use the Left and Right arrow  
buttons to select the preset (PRESET 1, 2 or 3) that  
best applies to your setup. Select a preset based on  
speaker sizes, then use the Up and Down arrow but-  
tons to adjust for the absence of Center or  
Surround speakers.  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
3.5 Surround Speaker Placement  
surround  
rear left  
front left  
center  
This speaker setting is preferred if you  
are not using surround backs.  
front right  
surround  
rear right  
surround  
rear left  
front left  
surround  
back left  
center  
This is the preferred speaker setting  
if you are using surround backs.  
surround  
back right  
front right  
surround  
rear right  
surround  
rear left  
front left  
surround  
back left  
center  
This speaker setting is preferred if you are  
using dipoles for your surround rears.  
surround  
back right  
front right  
surround  
rear right  
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INITIAL SETUP  
surround  
rear left  
Note: If space permits, install surrounds  
2-3 feet above viewers.This helps  
to minimize localization effects.  
2-3 ft.  
The available choices in each of the fields can be  
selected with the Left or Right arrow buttons on the  
remote; confirm the choice with Select button.  
3.6 Input Settings  
Input Settings shows information about the current  
state of operation of the GTP-830, and repeats  
much of the same information shown on the GTP-  
830’s front panel. This menu should be the only part  
of the on-screen display you might elect to use reg-  
ularly after setup is complete, as it allows you to  
easily see the operating mode from the listening  
position.  
AUDIO = identifies the selected audio input  
VIDEO = identifies the selected video input  
MODE = indicates the surround mode of the select-  
ed input (DOLBY DIGITAL, DTS, PRO LOGIC, HALL,  
STEREO).  
Highlight INPUT SETTINGS in the SETUP menu and  
press Select on the remote. You will see a screen  
similar to the following :  
DYNAMIC RANGE = indicates the dynamic range  
currently selected (100%, 75%, 50% and 25%) in  
Dolby Digital mode only, or N/A for the other  
modes.  
INPUT SETTINGS  
Highlight SAVE & EXIT and press Select to save the  
altered settings and return to the SETUP menu.  
Otherwise, select DO NOT SAVE & EXIT to leave  
without saving any changes.  
=
AUDIO VIDEO 1  
=
VIDEO VIDEO 1  
=
MODE STEREO  
=
DYNAMIC RANGE N/A  
DO NOT SAVE AND EXIT  
SAVE AND EXIT  
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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER  
Troubleshooting Tip  
Your GTP-830’s circuitry is built around advanced microprocessors. The GTP-830 may exhibit  
occasional anomalies arising from AC line surges, etc. If you experience unexpected behavior, or if  
the GTP-830 “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-830 on. This will reset the internal control circuitry and solve most problems.  
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 component  
between these two units is sufficient to minimize the  
hum. If this does not work, turn the system off and dis-  
connect 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 discon-  
nect or connect 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-830 should be checked by your Dealer or  
Authorized Service Center.  
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TROUBLESHOOTING  
PROBLEM  
CAUSE  
SOLUTION  
No sound  
• Power AC lead unplugged or  
power not switched on  
Tape Monitor selected  
• Mute on  
• Check if AC lead is plugged in  
and power switched on  
• De-select Tape Monitor mode  
• Switch off Mute  
No sound on one channel  
• Speaker not properly connected • Check connections and speakers  
or damaged.  
• Input lead disconnected or  
damaged  
• Check leads and connections  
• Select appropriate Surround  
mode (large or small)  
• In Setup “OFF” for surround  
speaker selected  
No sound on surround channels  
No sound on center channel  
• No surround mode selected  
• Mono sound source  
• Speakers not properly  
connected  
• Select a Surround Mode  
Test system with Stereo or  
Dolby Surround material  
• Check speakers and connections  
• Increase surround volume level  
• Surround volume level too low  
• Select appropriate Center  
mode (large or small)  
• Check speaker and connection  
• Increase center volume level  
• In Setup “OFF” for center  
speaker selected  
• Speaker not connected properly  
• Center volume level set too low  
“Dolby Digital” OR “DTS” auto-  
detection function does not work  
• Source not connected using  
digital input  
• Connect digital output of source  
to GTP-830  
• Check connections to all  
speakers in the system  
Weak bass/Diffuse stereo image  
• Speakers wired out of phase  
Remote control handset not  
working  
• Batteries dead, or incorrectly  
inserted  
• IR transmitter or receiver  
windows obstructed  
• IR receiver in direct sun or very  
bright ambient light  
• Check or replace batteries  
• Remove obstruction  
• Place unit away from direct sun,  
reduce amount of ambient light  
• Check antenna connections to  
preamplifier  
• Re-tune or switch off FM Mute  
No sound with tuner  
• Antenna leads incorrectly  
connected  
• Station not selected or weak  
signal with FM Mute on.  
Noise, hiss on AM and FM  
Distortion on FM  
• Weak signal  
• Check station tuning. Adjust or  
replace antenna.  
• Check station tuning. Adjust or  
replace antenna  
• Multi-path signals or interfe-  
ence from another station  
• Check station tuning. Switch off  
or move the source of the  
electrical noise  
Whistles or buzzes on FM & AM  
• Interference from other  
electrical sources - computers,  
games consoles  
• Interference from fluorescent  
lighting or electrical motor  
• Check station tuning. Adjust or  
replace AM antenna  
Whistles or buzzes on AM  
No RDS name (PS)  
• Check station tuning. Adjust or  
replace antenna  
• No remedy  
• Station signal too weak.  
• Station not transmitting RDS data  
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CARE, MAINTENANCE, AND SERVICE CARING  
UNDER NO CIRCUMSTANCES SHOULD YOUR  
5.0 Care, Maintenance, and Service  
Caring for your GTP-830  
UNIT BE SHIPPED TO OUR FACTORY WITHOUT  
PRIOR AUTHORIZATION, OR PACKED IN OTHER  
THAN ITS ORIGINAL CARTON AND  
PACKAGING MATERIAL.  
ADCOM has taken great care to ensure your GTP-  
830 is as flawless in appearance as it is electronical-  
ly. The front panel is a heavy gauge, high-grade alu-  
minum extrusion carefully finished and anodized  
for durability. The chassis, top cover, and rear pan-  
els 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.  
For Fax inquires, please include a return Fax or  
voice telephone number for the reply. When calling  
or writing about your GTP-830, be sure to note and  
refer to its serial number, as well as the date of pur-  
chase 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 pro-  
cedure 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.  
WARNING! Do not spray or pour liquids of any  
kind on the GTP-830.  
Servicing  
ADCOM has a Technical Service Department to  
answer questions pertinent to the installation and  
operation of your unit. In the event of difficulty,  
please contact us for prompt advice. 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 problem cannot be  
resolved through our combined efforts, we may  
refer you to an authorized repair agency, or author-  
ize 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.  
If the original shipping carton and its fillers have  
been lost, discarded, or damaged, a duplicate car-  
ton may be obtained from our Parts Department for  
a nominal charge.  
Always ship PREPAID VIA UNITED PARCEL SERVICE  
(UPS) OR OTHER APPROVED CARRIER. DO NOT  
SHIP VIA PARCEL POST, since the packaging was  
not designed to withstand rough Parcel Post  
handling.  
FREIGHT COLLECT SHIPMENTS CANNOT BE  
ACCEPTED UNDER ANY CIRCUMSTANCES.  
Please address mail phone, fax or e-mail inquiries to:  
ADCOM Service Corporation  
10 Timber Lane  
Marlboro, NJ USA 07746-1444  
[Voice: 732-683-2356]  
Monday through Friday 9:00AM  
to 5:00PM EST/EDT  
[Fax: 732-683-9790]  
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SPECIFICATIONS  
Preamplifier Section  
Input Impedance  
Audio  
50k Ohms  
75 Ohms  
Video  
Output Impedance  
Audio  
320 Ohms  
75 Ohms  
Video  
Frequency Response  
20Hz to 20kHz  
0.5dB  
0.01%  
0.009%  
THD+N@ Rated Output  
20Hz to 20kHz  
IM Distortion  
CCIF @ 15kHz and 16kHz  
Signal to Noise Ratio (@ 1kHz “A” weighted)  
Ref. to 1V input, max output voltage  
> 95dB  
220mV  
100Hz  
>80dB  
4.6V  
Sensitivity 1 volt output  
Subwoofer Crossover Frequency  
Crosstalk (@ 1kHz)  
Maximum Output Voltage  
Tone Controls (L and R front only)  
Bass effective below  
Bass Max Gain/Cut  
Treble effective above  
Treble Max Gain/Cut  
200Hz  
10dB @ 20Hz  
6.3kHz  
10dB @ 20kHz  
FM Tuner  
Usable Mono Sensitivity  
15dBµ  
22dBµ  
39dBµ  
50 dB Mono Quieting Sensitivity  
50 dB Stereo Quieting Sensitivity  
A-wtd. Signal to Noise Ratio  
Mono  
Stereo  
75dB  
70dB  
Stereo Separation (1 kHz)  
Alternate Channel Selectivity  
Capture Ratio  
43dB  
>50dB  
2dB  
General  
Power (available in 230V on special order)  
120VAC/50-60Hz  
Chassis Dimensions  
Maximum Dimension  
Weight  
5 3/16"(132mm) x 17"(432mm) x 13 3/4"(349mm)  
5 6/16"(137mm) x 17"(432mm) x 15"(381mm)  
16.5lbs. (7.5kg)  
Weight, Packed  
19.5lbs. (8.8kg)  
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10 Timber Lane  
Marlboro, NJ 07746  
tel: 732.683.2356  
fax: 732.683.9790  
© 2001 by ADCOM  
All rights reserved.  
GTP-830_v5.0  
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