Adcom GTP-760 User manual

GTP-760
Digital Processing
Tuner / Preamplifier
OWNER’S MANUAL

This page should be picked up
from any Adcom manual second
page (inside front cover)
1

Caution —To prevent electrical shock, do not use the polarized plug with an extension cord or receptacle, or
other outlet, unless the blades can be fully inserted to prevent blade exposure.
Attention— Pour prévenir les chocs électriques ne pas utiliser cette fiche polarisée avec un prolongateur, une
prise de courant ou une autre sortie de courant, sauf si les lames peuvente être insérées à fond sans laisser
aucunepartiea décourvert.
Explanation of Graphic Symbols
This“Lightning Flash with Arrowhead” symbol is intended to alert the user of the presence of uninsulated
“dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to persons.
The“Exclamation Point”symbol is intended to alert the user to the presence of important operating and
maintenance(servicing) instructionsin theliterature accompanyingthe appliance.
This equipment generates and uses radio frequency energy and if not installed and used
properly (that is, in strict accordance with the manufacturer’s instructions), may cause
interference to radio and television reception. It has been type tested and found to
comply with the specifications Subpart J of Part 15 of FCC rules, which are designed to
providereasonable protectionagainst suchinterference ina residentialinstallation.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause interference to radio or television reception, which can be
determined by turning the equipment on and off, the user is encouraged to try to correct
the interference by one or more of the following measures.
•Reorient thereceiving antenna
• Relocate the processor with respect to the receiver
• Move the processor away from the receiver
• Plug the processor into a different outlet so that the processor and receiver
are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television
technician for additional suggestions. The user may find the following booklet prepared
bythe FederalCommunications Commissionhelpful: “Howto identifyand ResolveRadio-
TV Interference Problems”.This booklet is available from the US Government Printing
Office,Washington,DC,20402, Stock No.004-000-00345-4.
SAFETY NOTIFICATION PAGE
2

A NOTE FROM ADCOM
Thankyouand congratulationsonyourpurchaseof theADCOM GTP-760Digital ProcessingTuner/Preamplifier.
The GTP-760 forms the centerpiece of a truly leading edge home theater system. To deliver the highest
possibleperformance, ADCOMdesigners andengineers utilizedthe mostadvanced digitalsignal processing
“engines”available, the Motorola 56000 series. The GTP-760 actually uses three processors in combination,
two 56009’s and one 56007, for full 24-bit Dolby Digital and DTS decoding with digital bass management. In
addition, we chose high precision six channel 20-bit Digital-to-Analog converters and all Class A analog output
circuits for the finest possible sound.
ADCOM PROTECTION PLAN (USA ONLY)
ADCOM offers the enclosed valuable LimitedWarranty. Please read the details on the Warranty Card carefully
to understand the extent of the protection offered by theWarranty, 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
immediatelyin order toensure thatyou havereceived a genuineADCOM productwhich hasnot been opened,
mishandled,or tampered within anyfashion.
CONCEALED SHIPPING DAMAGE
Before your new GTP-760 left our factory, it was carefully inspected for physical imperfections and tested for all
mechanical and electrical parameters as a routine part of ADCOM’s systematic quality control program. This
shouldensure aflawless productin bothappearance andperformance. After youhave unpackedthe GTP-760,
inspect it for physical damage. Save the shipping carton and all packing material as they are intended to
reduce the possibility of transportation damage should your component ever need to be shipped or moved
again.
In the unlikely event that damage has occurred, notify your dealer immediately and request the name of the
freight carrier so a written claim to cover shipping damages can be filed. THE RIGHTTO A CLAIM AGAINST A
PUBLIC CARRIER CAN BE FORFEITED IFTHE CARRIER IS NOT NOTIFIED PROMPTLY, INWRITING, AND
IFTHE SHIPPING CARTON AND PACKING MATERIALS ARE NOT AVAILABLE FOR INSPECTION BYTHE
CARRIER. SAVE ALL PACKING MATERIALS UNTILTHE CLAIM HAS BEEN SETTLED.
This unit is manufactured under license from Dolby Laboratories Licensing Corporation. It is
additionallylicensed underone or moreof thefollowing patents:U.S.number3,959,950,
Canadiannumbers1,004,603 and1,037,877.
Dolby(r)Pro Logic(r),and DolbyDigital(r)are registeredtrademarks ofDolbyLaboratories
LicensingCorporation.
Manufactured under license from DigitalTheater Systems, Inc. US Patent Number
USPat.No.5,451,942and otherworld-widepatents issuedand pending. “DTS”,“dts”,
“DTS Digital Surround”, are trademarks of DigitalTheater Systems, Inc.
(Copyright 1996 DigitalTheater Systems, Inc. All Rights Reserved.
3

Table of Contents
PRELIMINARY INFORMATION.....................................................................p. 2
SafetyInformation
A Note from ADCOM
TheADCOM ProtectionPlan
UnpackingyourGTP-760
1.0 PRODUCT FEATURES..........................................................................p. 6
1.1 Front Panel Controls
Headphonejack
Powerbuttonand LED
Surroundmode buttonand LEDindicators
DialogEnhance button
DynamicRange buttonand LEDindicators
DisplayWindow
Tunerpreset buttons
Shift(8-14) button
FM/AM button
Seek/Manualbutton
TuningDown/Upbuttons
Panel Dimbutton
AudioMute button
5.1Channel Inbutton
Input Selector buttons and LED indicators
MasterVolume control
IR(infrared) sensor
Room2 button
1.2 Rear Panel Inputs & Outputs — System Connections.........................p. 8
Compositeor S-Video?
RCA jack color key
Antennaconnections
Digitalaudio/standard (composite)video inputs
DVD
Digital2
Digital1 (RF)
Dig.1RF demodulatorswitch
12 volt trigger output
Analogaudio/standard (composite)video inputsand outputs
LD(laserdisc) inputs
VCRinputs and outputs
Videoaux. inputs
Room2 outputs
Video Processor inputs and outputs
Tapeinputs andoutputs
Videomonitor outputs
CDinputs
S-Videoinputs andoutputs
DVDinputs
Digital 2 inputs
Digital 1 input ( RF )
4

LDinput
VCRinput andoutput
Videoaux input
Room2 output
Videomonitor outputs
VideoProcessor inputand output
Video Processor On/Off switch
Remotecontrol connections
Infraredrepeateroutputs
Remotesensor extensionoutputs
Preamplifieroutputs
5.1Channel inputs
ACfuse holder
ACpower cord
ACconvenience outlet
1.3 The Remote Control..................................................................................p. 19
2.0 INSTALLING/CONNECTING THE GTP-760.............................................p. 28
2.1 Physical Placement
2.2 Connecting Source Components to the GTP-760
3.0 INITIAL SETUP...............................................................................................p. 29
3.1 The On Screen Display
3.2 CHANNEL DELAY
3.3 SPEAKER SIZE
3.4 CHANNEL BALANCE
3.5 INPUT SETTINGS
4.0 BASIC OPERATION......................................................................................p. 34
4.1 Surround Modes
4.2 Tuner
4.3 Room 2
5.0 TROUBLE SHOOTING.................................................................................p. 38
6.0 CARE, MAINTENANCE, and SERVICE...................................................p. 40
7.0 SPECIFICATIONS........................................................................................p. 41
5

1.0 PRODUCT FEATURES
1.1 Front Panel Controls
The GTP-760’s front panel is a model of simplicity. All controls are logically grouped for easy, intuitive
operation. Familiarize yourself with the following diagram and read the short explanations of each
feature. When you finish, you will be well on your way to enjoying the GTP-760’s convenience and
sound quality.
1 Headphone Jack:This accepts the stereo 1/4" phone plug connector used by almost all high
qualityheadphones. When you usethe headphonejack, theGTP-760’s rearpanel mainline
level Preamp outputs are muted. Room 2 outputs are NOT affected.
2 Power Button and LED: Use this button to turn your GTP-760 ON and OFF. When you first
push the Power Button to the ON (depressed) position, the center LED will glow yellow until all
circuitry stabilizes. When your GTP-760 is ready to use, the LED will turn red.
NOTE: The front panel Power Button must be engaged to use the remote control. If the front
panel Power Button is not depressed, the remote control will not have any effect. When the
front panel Power Button is engaged, the remote controller’s “Power”button will cycle your
GTP-760between standby and operationmodes. Whenin standbymode (indicatedbythe
yellow LED), you need to press the remote control’s “Power”button to activate your GTP-760’s
circuitry (the LED will turn red when you do this).
3 Surround Mode Button and LED Indicators: Pushingthe buttonsequentially steps your
GTP-760 through all the available operating modes for the selected input. The modes that are
not available for the current operating state are automatically bypassed.
For the 6 analog inputs, the choices are always the same - Dolby Pro Logic , Dolby Pro Logic/
Cinema , symphony hall , stadium , jazzclub , 5-chan.stereo ,and 2-chan.stereo .
For digital inputs (DVD, digital 1 and digital 2) the choices are dynamic and depend on the type
ofsignal beinginput.
For DTS signals, the choices are DTS , DTS/Cinema and DTS/2 chan.stereo .
For Dolby Digital 5.1 channel signals, the choices are Dolby Digital , Dolby Digital/Cinema and
DolbyDigital/2chan.stereo .
GTP-760
DIGITAL
phones
surround mode
DTS
Dolby Digital
DIGITAL
SURROUND
Cinema
Dolby Pro Logic
symphony hall
stadium
jazz club
5-chan. stereo
2-chan. stereo
DVD digital 1 digital 2
dialog enhance
dynamic range
full
75%
50%
25%
FM/AM seek/manual < tuning > dim 5.1-channel in CD tape tuner room 2
1234567shift (8-14) LD VCR video aux
33 7 6 8 14 15
1 2 5 4 9 10 11 12 13 14 16 17
RDS PROGRAM TYPE AM FM STEREO SEEK VOLUME MUTE PRESET 18
6

For familiar music CDs (also called PCM signals) the choices are the same as for analog
inputs, Dolby Pro Logic , Dolby Pro Logic/Cinema , symphony hall , stadium , jazz club , 5-chan.
stereo , and 2-chan.stereo . Because CDs do not carry Dolby Digital signals, the Dolby Digital
option is not available and the GTP-760 automatically bypasses that choice.
4 Dialog Enhance Button: A shelving filter with a corner frequency of 7 kHz that reduces the
often excessive high frequencies on some movie soundtracks that make them fatiguing to
listen to. It also provides a boost in the midrange output for center and front channel speakers.
5 Dynamic Range Button and LED Indicators:This button, usable only with a Dolby Digital
source, incrementally reduces the audio track’s dynamic range in four steps (full, 75%, 50%,
and 25%) to allow comfortable listening under a wide variety of conditions. The normal, or
default, position is full.
Althoughwe usuallypreferto reproducea source’s fulldynamic range(the difference between
very loud and very soft sounds), we occasionally need to reduce dynamics. For example,
when playing a movie late at night, loud explosions might wake sleeping family members.
Simply turning the volume control down would probably make a whisper in the next scene
inaudible. The Dynamic Range button solves this dilemma by progressively lowering the
volume of loud peaks while increasing the level of softer sounds. This allows you to hear every
element of the soundtrack without disturbing those around you or forcing you to strain to hear
delicatenuances.
6 DisplayWindow:This shows all the pertinent information you will need to effectively use the
GTP-760 on a daily basis. We carefully designed this window to display only the data you need
at the time you need it. The window’s configuration will change as you ask the GTP-760 to do
different things. The display normally shows the input you’ve selected. If you’re currently
listening to AM or FM radio, the display shows that signal’s frequency. Additional information
appearsas neededand we’ll notethese appearancesin subsequentsections ofthis manual.
7 Tuner Preset Buttons:These buttons allow quick access to up to 14 preselected AM or FM
broadcast frequencies. To save presets, tune to the desired station and press one of these 7
buttons. Continue to hold the button until it lights and the display shows the preset number.
Use the Shift button in conjunction with these buttons to select and save presets 8-14.
8 Shift (8-14) Button:This allows each of the 7 tuner preset buttons to do“double duty.” When
the LED in the center of the shift button is illuminated red, the 7 tuner preset buttons activate
tuner presets 8-14. When the LED in the center of the shift button is not illuminated, the 7
tuner preset buttons activate tuner presets 1-7.
9 FM/AM Button: As you might expect, this button selects AM or FM. In addition to the
selected broadcast frequency, a small “AM”or “FM”indicator appears in the bottom of the
Display Window to confirm your choice.
10 Seek/Manual Button:This controls the tuner’s scan function and working of the tuning buttons.
In SEEK - goes UP to the next available station.
In MANUAL - moves UP in increments to the desired frequency you select manually.
11 Tuning Down/Up Buttons:These allow easy selection of all the stations your GTP-760 can
receive.Remember that theseTuning buttons will scan to the next active or to the adjacent
frequencydepending onhow you’veset theSeek/Manual buttondescribed above.
12 Dim Button:This reduces Display window brightness for listening or viewing in a dark
room. The button simply switches between full and reduced illumination.
7

13 5.1 Channel In Button:This button selects the 5.1 channel analog input, which allows the user
to enjoy high-resolution, multichannel formats such as DVD-Audio and Super Audio CD. This
pure analog input completely bypasses any digital conversion or processing to maintain the
highestpossible audioquality; thus,delay andbass managementare disabledand nosurround
modes may be selected when using the 5.1 channel analog input. This input is selectable
from the front panel only.
14 Input Selector Buttons and LED indicators:These allow easy choice of any available input.
When you select a particular input, the LED in the center of that button will light and the input
name will appear in the Display window to confirm your choice. Choosing an input automati-
cally selects the Surround mode last used with that input. You may change the Surround mode
at any time by using the Surround Mode button (#3 above).
15 MasterVolume Control:This rotary knob adjusts the volume for all active speakers simulta-
neously. While it has the accustomed look and feel of the familiar analog volume control, it’s
internal implementation is digital. The distinction will be apparent only in that the knob will
NORMALLY be positioned near 12 o’clock for typical listening levels. This will be true for
allsources.
16 IR (infrared) Sensor:Thissmallwindowreceivescommands fromthe remotecontroller.Do
not block this window with accessories, cables, CD jewelboxes, etc.,or theremote control
will not work.
17 Room 2 Button: Pressing this button will activate the Room 2 output circuitry, enabling any of
six analog audio and video sources;LD,VCR, video aux, CD, tape, and tuner.Pressing the
Room 2 button a second time will cause the LED’s on the available source buttons to il
luminate. The source that is currently selected for Room 2 will be flashing. Choose the source
you want to send to Room 2 by pressing the desired source button, it will illuminate steadily
and the others will go off. Pressing and holding Room 2 for several seconds will turn the Room
2 output OFF.
1.2 Rear Panel Inputs & Outputs — System Connections
Like the front panel, the GTP-760’s rear panel is carefully arranged to make hookup,
configuration, and use as simple as possible. However, the GTP-760’s extraordinary
capabilities take some study to use most effectively. We strongly suggest that you read this
section of the manual before beginning to hook up your system. You will save yourself much
time and effort if you carefully think out what you expect from your system:consider the
components you will use, where they’ll be placed, and how you will want them to work together.
The diagrams and notes in this section will probably answer most of your questions about interfacing
the GTP-760 with other components in your system. You will find more detailed information on initial
setup and configuration in following sections of the manual.
Note that the GTP-760’s RCA-style jacks have color-coded centers to make connections
easier. Use this key to help route cables properly:
YELLOW centers = VIDEO inputs(composite)
BLACK centers = DIGITAL AUDIO inputs
and
CENTERCHANNELandSUBWOOFER
PREAMP inputs and outputs
WHITE centers = LEFT CHANNEL ANALOGAUDIO inputs
RED centers = RIGHT CHANNEL ANALOGAUDIO inputs
8

Composite or S-Video?
One of the first system hook-up decisions to make will be which video format to use. While the composite
video format is more widely used, S-Video can offer improved picture quality. The GTP-760 does not
convert between the two formats. However, it can save the video mode for each input. It is
recommended that only one video format be used as this simplifies normal operation. However, setup for
using both formats is also described below. The GTP-760 is shipped from the factory ready for composite
video sources and display devices.
For CompositeVideo Only: If your television has only composite video inputs (usually a yellow colored
RCA style connector) or you elect to use only composite video connections in your system, then the
GTP-760 is already properly set. Connect a video cable from one of the two yellow “standard monitor”
video jacks on the back of the GTP-760 to the video input of your television. Turn on the GTP-760 and
television and verify a blue colored screen. If you are unable to get the blue screen, consult your television
owner’s manual to determine how to select the appropriate television input. If you are certain your
television is in the correct mode, follow directions 1 through 3 below (S-Video only). Repeat that procedure
until the GTP-760 display reads COMPOSITE at the completion of step 3.
For S-Video Only: If your television has an S-Video input and all of your video source components have
S-Video outputs, then you will probably elect to use only S-Video connections in you home theater system.
The following steps will switch the GTP-760 to S-Video operation.
1) Turn the GTP-760 off via the front panel power switch.
2) On the front panel, hold the surround mode button down and power the unit ON.
3) Continue to hold the surround mode button until the front panel display of the GTP-760 reads S-VIDEO.
TheGTP-760 isnow setfor S-VIDEOoperation. (Note:Repeating theprocedure returnsthe unitto
composite mode and COMPOSITE shows in the display). Connect an S-Video cable from one of the two
“S-video monitor”jacks on the back of the GTP-760 to the S-Video input of your television. Turn on the
GTP-760 and television and verify a light gray colored screen. If you are unable to get the gray screen,
consult your television owner’s manual to determine how to select the appropriate television input.
For using both Composite and S-Video: While more difficult to do, you may elect to use both video
modes, if some of your video sources have composite video only and others have S-Video capability. This
connection also requires that your television accepts both formats. A common scenario would be
connecting both aVCR that has composite video only and a DVD player that has S-Video capabilities to
your GTP-760. The GTP-760 will not convert between the different video types, but will remember the
video mode for each of its inputs. Thus, when you select VCR, the GTP-760 switches to composite video
mode. When you select DVD, the GTP-760 switches to S-Video mode. Consequently, to operate your
system in this way connect BOTH a composite video cable from one of the“standard monitor” jacks on the
back of the GTP-760 to the composite input on your television AND an S-Video cable from one of the
“S-Video monitor” jacks on the back of the GTP-760 to the S-Video input of your television. (Note, in this
example, the GTP-760 switches modes automatically, but you will still need to manually change the mode
of your television anytime you switch between these inputs). Turn on the GTP-760 and television and
verify a blue colored screen. If you are unable to get the blue screen, consult your television owner’s
manual to determine how to select and use the television’s video inputs. All of the GTP-760 inputs are
initially set for composite mode. Consult section 3.5 INPUT SETTINGS discussion of theVIDEO field to
use the GTP-760 on screen display to save the S-Video mode settings for your S-Video sources.
9

18 Antenna connections
19 Digital audio/standard(composite) videoinputs
DVD
Digital2
Digital 1 ( RF )
20 Digital 1RF Demodulatorswitch
21 12 volt trigger output
22 Analogaudio/standard
(composite)video inputsand outputs
LD(laserdisc) inputs
VCRinputs and outputs
Video aux in
Room2 outputs
Video Processor inputs and outputs
Tapeinputs andoutputs
Standard(composite) videomonitor outputs
CDinputs
23 S-Video inputsand outputs
DVDinput
Digital 2 input
18 Antenna Connections:Youneedtoconnect different antennasfor FMand AMreception.
Digital 1 input (RF)
LDinput
VCRinput
VCRoutput
Videoaux input
Room2 output
S-Videomonitor outputs
VideoProcessor inputand output
24 Video Processor On/Off switch
25 Remote controlconnections
Infraredrepeateroutputs
Remotesensor extensionoutputs
26 Preamplifier outputs
27 5.1 inputs
28 AC powercord andAC fuseholder
29 AC convenienceoutlets
10

ForFM, useeither the75 ohm“F” connectoror the300 ohm“push terminals”dependingon
what type of antenna you’ve chosen. If you’re getting FM from a cable system feed, you will
most likely use the“F”connector. The “T”shaped antenna supplied with the GTP-760 uses the
push terminals marked“300 ohms.” “T”antennas are directional. They should be placed as
high as possible with the arms fully extended. If possible, the arms should be oriented so that
they are at right angles to the transmitter.
Thesupplied AMloopantenna connectsto thepush terminalsmarked“ground”and“AM,”
respectively. You may need to adjust the position of the antenna for best reception. If you use
anoutdoor AMantenna, followthe manufacturer’s instructions.
19 Digital Audio/Standard (Composite)Video Inputs
Rememberthat youmust chooseeither standard(composite) orS-Video
connections before hooking up source components. This section of the
manual assumes you have chosen composite connections. S-Video
connectionswill be handledin asubsequent section.
DVD in: Connect the DVD player’s composite video output to the yellow-center RCA jack
immediatelyunder the“DVD in”label.
Connect the DVD player’s RCA-style digital output jack to the GTP-760’s black-center RCA
jack located under the“DVD in”label.
Note: If your DVD player has only aTOSlink (optical) digital output, you may need to connect it
to “dig.2 in.” If this is the case, remember to connect the player’s video output (composite or S-
transmitter
signal direction
best reception
transmitter
signal direction
FM antenna poor reception
to GTP-760 FM
antenna connection
11

Video)to theappropriate “dig.2in” jack.
Digital 2 in:This input is recommended for an audio/video source (DSS receiver, etc.) with a
TOSlink (optical)digital output.
Remember that the composite video connection will go to the yellow-center RCA jack
immediatelyunder the“dig.2in” label.
Connect the source’s TOSlink (optical) digital output to the GTP-760’sTOSlink socket located
underthe “dig.2in”label.
Digital 1 in (RF):We recommend this input for laserdisc players with a digital RF output.
It is the only input on the GTP-760 equipped with the RF demodulator needed to process a
laserdisc’sDolbyDigital encodedsoundtrack.
Connections follow the same pattern detailed in“DVD in”and“Dig.2 in” above. Connect the
laserdisc player’s composite video output to the yellow-center RCA jack immediately under the
“dig.1”label. Then connect the player’s coaxial digital output to the black-center RCA jack
underthe “dig.1in”label.
20 Digital 1 RF Demodulator (bypass) Switch
(seeillustration onprecedingpage)
This switch adds flexibility to the GTP-760. If you play laserdiscs with Dolby Digital-encoded
soundtracks, put this switch in the IN position. This places the demodulator circuit in the signal
pathand allowsproperDolby Digitaldecoding.
If you do not have a laserdisc player with a digital RF output, place the switch in the OUT
position.You can then use this input in exactly the same way as you would use the DVD input.
DVD
in in in
digital 2 digital 1
DVD
in in in
in out
digital 2 digital 1
dig1RF
demodulator
Standard
video
in
LD
12V
trigger out
L
R
in
12

21 12VoltTrigger Output
(seeillustration onprecedingpage)
Tofacilitateremote turn-on and turn-off ofother components(poweramplifiers,forexample),
this 2.5 mm mini-jack provides a constant signal (12 volts DC) whenever the GTP-760 is fully
powered. When the GTP-760 is turned off (via the front panel switch) or placed in standby
mode (via the “power” button on the remote control), the jack has no output.
22 Analog Audio and Standard (Composite)Video Inputs and Outputs
LD (laserdisc)Inputs:
Use these inputs as you have already used the digital source inputs (see #19 above.) After
selecting and connecting the laserdisc player’s composite video output to the GTP-760’s
yellow-center RCA jack immediately under the“LD in”label, connect the player’s left channel
analog audio output to the white RCA jack under the“LD in”label. Then connect the player’s
right channel analog audio output to the “LD in” red RCAjack.
VCR Inputs and Outputs:
Because you will use your VCR to record as well as play, take care to follow these
instructions carefully.
1) Connect theVCR’s composite video output to the GTP-760’s yellow-center RCA jack
immediately under the “VCR in” label.
2) Connect theVCR’s composite video input to the GTP-760’s yellow-center RCA jack
immediately under the “VCR out” label.
3) Connect theVCR’s left channel analog audio output to the GTP-760’s white “VCR in” jack.
4) Connect theVCR’s right channel analog audio output to the red“VCR in”jack.
5) Connect theVCR’s left channel analog audio input to the GTP-760’s white “VCR out” jack.
6) Connect theVCR’s right channel analog audio input to the red “VCR out”jack.
Note: You may want to use so-called “A/V combination”patch cords to make this step less
confusing. Sold under a variety of names, these combination cables usually include a video
conductor and two audio conductors in one cable assembly. If you elect to use them, make
sure that they support the video format (composite or S-Video) you’ve chosen for your system.
Standard
video
in
in out
LD
VCR
video aux
in
room2
out
CDoutin
tape
outinoutinin
13

Video Aux Input:
This input is electrically identical to the LD input described above and will accommodate a wide
varietyof audio/videosources.
After selecting and connecting the source’s composite or S-Video output to the GTP-760’s
corresponding“video aux”videoinput, connect thesource’s leftchannel analog audiooutput to
the white RCA jack under the“video aux in”label. Then connect the source’s right channel
analog audio output to the red RCA jack under the “video aux in” label.
Room 2 Outputs:
Theseoutputssupply videoand audio
signals for distribution to a secondary
area or room in your home. Room 2
features are covered in section 4.3 of
thismanual.
Connect the composite Room 2 video
output to the video display device (TV
orvideoprojector)inthe remotearea.
Make sure the cable(s) you use for this
connectionare highquality andwell
shielded as long cable runs act as
antennasfor unwantedinterferencesignals.
(Depending on the distance between the GTP-760 and the display device and, to a lesser
extent, the video format you’ve chosen, you may need a video distribution amplifier to make
sure the signal arrives at the display device properly. Consult your ADCOM dealer for
additionalinformation ifneeded.)
Connect the white “Room 2 out” jack to the left channel input of the amplifier used to power
speakers in the remote area. Then connect the red “Room 2 out”jack to the amplifier’s right
channelinput.
Video Processor Inputs and Outputs:
These connections allow easy interface with video processors. Note that a separate video
processor handles video signals only so you don’t need to concern yourself with any audio
connections between it and the GTP-760. ( For additional information, consult your video
processor’smanual )
Connect the processor’s composite video output to the GTP-760’s
yellow-center “Video Processor in”jack. Then connect the video
processor’s composite inputto theGTP-760’s yellow-center“Video
Processorout” jack.
If you are using the GTP-760 with a separate video processor, make
sure you’ve set theVideo Processor switch to the“ON” position.
in in in in out in out
digital 2 digital 1 LD
room2
out video processor
in out
standard monitor
12
IR repeater
L
R
rearfrontCDoutin
tape
out
VCR video aux room2
video processor
in out
14

Tape Inputs and Outputs:
These connections are designed for a cassette deck
orany otheraudio recordingdevice withline-level
analoginputs andoutputs.
Follow these instructions:
1) Connect the recorder’s left channel analog audio output to the GTP-760’s white
“tape in” jack.
2) Connect the recorder’s right channel analog audio output to the red“tape in”jack.
3) Connect the recorder’s left channel analog audio input to the GTP-760’s white
“tape out” jack.
4) Connect the recorder’s right channel analog audio input to the red“tape out”jack.
Standard (Composite) Video Monitor Outputs:
Connect the main monitor or display device to the yellow-center RCA jack
under the“standard monitor 1”label. You may use the “standard monitor 2”
jack for another monitor if desired. Properly connected, either monitor will
thendisplayan imagefrom avideo source oron-screen menuinformation
whenappropriate.
CDInputs:
These line-level analog inputs allow easy connection of a CD player (or other two channel
analogaudio source.)
Follow these instructions:
1) Connect the CD player’s left channel analog audio output to the GTP-760’s white
“CD in” jack.
2) Connect the CD player’s right channel analog audio output to the red “CD in” jack.
L
R
CDoutin
tape
standard monitor
12
15

23 S-Video Inputs and Outputs
Note: This section assumes that you’ve elected to use S-Video sources and display devices and that
you’ve set the GTP-760 for S-Video signal transfer by following the steps described in the boxed note
entitled Composite or S-Video? on page 9.
When hooking up S-Video capable audio/video components, follow the steps outlined in Sections 19
and 22 above. However, ignore the instructions for composite video connections and substitute
thefollowing:
DVD in: Connect theDVD player’sS-Video output tothe mini-DINconnector underthe S-Video
“DVDin”label.
Digital 2 in: Connect the source’s S-Video output to the mini-DIN connector under the S-Video
“dig.auxin” label.
Digital 1 in (Dolby Digital RF optional):Connect the source’s S-Video output to the mini-DIN
connectorunder theS-Video “digital1 in” label.
LD in: Connect the LD player’s S-Video output to the mini-DIN connector under the S-Video
“LDin”label.
VCR in: ConnecttheVCR’s S-Videooutput tothe mini-DINconnector underthe S-Video
“VCRin”label.
VCR out: ConnecttheVCR’sS-Videoinputtothemini-DIN connectorunder theS-Video
“VCRout”label.
Video aux in: Connect the source’s S-Video output to the mini-DIN connector under the S-Video
“videoaux in”label.
Room 2 Output: Connect the video display device to the S-Video mini-DIN output under the
“room2 out”label.
S-Video Monitor Outputs: Connect the main monitor or display device to the mini-DIN jack
under the“S-Video monitor 1”label. You may use the“S-Video monitor 2”jack for
another monitor if desired. Properly connected, either monitor will then display an
imagefrom avideo sourceoron-screen menuinformation whenappropriate.
Video Processor Input and Output: ConnecttheVideoProcessor’sS-Video outputtothe mini-DIN
jack immediately under the“video processor in”label. Then connect the video
processor’s S-Video input to the mini-DIN jack under the“video processor out”label.
video processorDVD
S-video
in in in in in out in out 1 2 in out
digital 2 digital 1 LD VCR video aux room2 S-video monitor
16

24 Video Processor On/Off Switch
This switch controls a “video loop” that enables the GTP-760 to function with a separate
videoprocessor.
For conventional home theater systems, make sure the “video processor on/off”switch is in the OFF
position. When using a separate video processor, place this switch in the ON position.
25 Remote Control Connections
.Infrared Repeater:Thesemini-jack outputstransfer commandcodes received fromeither theIR
mini-jack or remote sensor extension inputs to an IR repeater located close to other
system components. IR signals received at the GTP-760’s front panel IR receptor are
NOT availableatthe infraredrepeater outputs.
Remote Sensor Extension Inputs:Theseinputs receivesignals fromADCOM’s XR500IIand
SPM500IIremote controlsensors.
IR (Infrared) Input:This inputaccepts modulatedIR commandsfrom industry standardIR
controllersvia amono mini-plugconnector.
26 Preamplifier Outputs
These are the GTP-760’s main outputs. Connect each to the proper amplifier or amplifier channel
as follows:
1) Connect the white-center RCA output marked “front L(eft)” to the amplifier channel
designated for the left front loudspeaker.
2) Connectthe red-center RCAoutput marked“front R(ight)”to theamplifier inputdesignated
for the right front loudspeaker.
3) Connectthe white-center RCAoutput marked“rear L(eft)”to theamplifier inputdesignated
for the left rear loudspeaker.
4) Connectthe red-centerRCA outputmarked “rearR(ight)” tothe amplifierinput designated
for the right rear loudspeaker.
5) Connect the black-center RCA output marked “center” to the amplifier input designated for
the center channel loudspeaker.
6) Connect the black-center RCA output marked “subwoofer” to the amplifier input
(in most cases, the line-level input of a powered subwoofer) designated for
the subwoofer.
Note:There are two subwoofer outputs (1 & 2.) They are in parallel (i.e., each produces an
identical signal) and may be used interchangeably. We’ve included these outputs to make it
easier to add a second subwoofer, if desired. Alternatively, you can connect the LEFT and
RIGHT channel RCA jacks to a single subwoofer.
remote sensor
extension
IR repeater IR input
1
2
L
R
subwooferrear centerfront
preamp outputs
17

27 5.1 Channel Inputs
These are the multichannel analog inputs. Connect your DVD-
Audio, SACD or other multichannel source as follows:
1) Connect the source’s “front left”output to the white-centered RCA input marked “front”.
2) Connect the source’s “front right”output to the red-centered RCA input marked“front”.
3) Connect the source’s“surround left”output to the white-centered RCA input marked “rear”.
4) Connect the source’s “surround right”output to the red-centered RCA input marked“rear”.
5) Connect the source’s “center”output to the black-centered RCA input marked“center”.
6) Connect the source’s “subwoofer”output to the black-centered input marked “subwoofer”.
Note:TheGTP-760 doesnot apply bass-managementto the5.1 channel analoginputs,and all
six input channels will pass full range signals. Some multichannel sources may not make use
of bass-management techniques. Please read the multichannel source’s manual carefully to
ensurecorrect operation.
28 AC Fuse Holder **CAUTION** UNPLUG the unit before checking the fuse!
This holder provides easy access to the AC line fuse if that fuse needs replacement. To gain access to
the fuse, insert a Phillips head screwdriver and turn counterclockwise. After replacing the fuse, reseat
the holder by turning clockwise until the holder is firmly seated.
When replacing the fuse, ALWAYS use one of equal value (for domestic models use a F500mA, 250V
fuse available at any electronic parts store.) NEVER use a fuse of higher value. If the fuse fails again,
consult your ADCOM dealer or call the ADCOM Service Department directly.
AC Power Cord (115VACmodels)
Make sure to seat this cord firmly in an unswitched wall socket to provide uninterrupted power to the
GTP-760. When removing the cord from an AC socket, NEVER pull on the cord itself. Instead,
grasp the plug firmly and remove it from the socket. You may need to “rock”the plug lightly for
easierremoval.
AC Power Cord Receptacle (export models)
This IEC-standard socket accepts a wide variety of AC power cords.
front
5.1-channel in
rear subwoofer
center
18

29 AC ConvenienceOutlets (115VACmodels)
These outlets are for low-current source components only. They are not
designed for power amplifiers.
The single unswitched outlet is live whenever the GTP-760 is plugged into a live AC source. The two
switched outlets are live only when the GTP-760 is fully operational (i.e., whenever the front power
button’s LED is red.) They are not live when the GTP-760 is in standby mode (when the LED is yellow.)
Observe the wattage limitations printed above the two switched and one unswitched outlets. Note that
the 500VA figure (equivalent to 500 watts) above the two switched outlets is a maximum figure for both
outlets combined. Do not exceed this limit.
We strongly recommend the use of our surge suppresser/ line conditioners, the ADCOM ACE family of
products, for systems with substantial amplifiers and many source components. The ACE products
relieve the GTP-760 from handling large current surges, while they protect your entire system by
filtering and conditioning the AC current. In addition to the numerous heavy duty AC outlets of the
ACE-315,the ACE-615includessequential power-upandpower-downmodesto minimize“thumps”
whenever you turn your system on or off.
1.3 The Remote Control
The GTP-760 remote control is a learning remote control that is capable of saving commands for all
remote controls in your home theater system. In this way, you may eliminate the confusion of using
multiple remotes. Although such power comes with some added complexity, the complexity is minimal
andwith somerepetition willbecome secondnature.
The single most important aspect to master about the GTP-760 remote control is the function of the
eight source select buttons at the top of the remote. These are buttons 30 in the figure on the next
page. Each of these buttons cause two things to happen when used. First, they select the
corresponding input on the GTP-760. Second,THESE KEYS REMAP ALL OFTHE OTHER BUTTONS
ONTHE REMOTE CONTROL. You can think of each of these buttons as having a page of commands
associated with it.
Most of the GTP-760 remote commands are saved under the main remote page. Whenever you desire
to control the GTP-760 via remote, you must first ensure the main page is active. As an example,
press main on the remote control. Now, press the dim button.If your GTP-760 is on, the brightness of
the front panel display changes. Notice also that the main button on your remote illuminates. This
serves as a reminder that the main remote page is currently active.
Now press the CD button and then the select/play button. Notice now that the CD source button lights.
The CD remote page is now active. If you have an ADCOM CD player, this command will cause an idle
CD to play. Now, press the dim button again. You should note that CD button does not light. The dim
command is not preprogrammed in the CD remote page. If your GTP-760 is on you will also notice the
display does not respond to this command. Press the main button again to reenter the main remote
page. The dim button will now again change the GTP-760 display.
The button description that follows distinguishes the function of each button dependent on the page the
remote is in. The remote is shipped from the factory with ADCOM commands saved under the main,
tunerandCD pages.
The ADCOM universal remote controller is preset to operate most GTP-760 functions (MAIN
device mode), GTP-760 AM/FM tuner functions (TUNER device mode) and GCD-700/750 CD
functions(CD device mode).
19