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

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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

The ADCOM Protection Plan

Unpacking your GTP-830

Safety Information

4-5

GTP-830 Checklist

1.0 Product Features

1.1 Front Panel Controls

1.2 Rear Panel Inputs & Outputs - System Connections

1.3 The Remote Control

2.0 Installing/Connecting the GTP-830

2.1 Physical Placement

2.2 Connecting Source Components to the GTP-830

3.0 Initial Setup

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

5.0 Care, Maintenance, and Service

6.0 Specifications

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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER

[02]

[05]

[01]

[03]

[07]

[06]

[08]

[04]

[05]

volume

display

FM mute/high blend

memory

tune/preset

down

tape monitor

ext 5.1

video 3

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.

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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

ADCOM OWNER’S MANUAL | 13

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GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER

[14]

[15]

[16]

[17]

[23]

preamp outputs

aux-out

monitor out

video

antenna

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

audio

ear

gnd

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

video 4

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.

out

video 3

tape

out

front

digital audio in

12v DC trigger

sur

110 V

230 V

video 2

center

sub

video 1

video 2

video 3

video 1

serial #

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

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

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).

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

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.

audio

out

video 4

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

video 2

monitor out

video

s-video

video 1

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.

[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.

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

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

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

[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

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

backs

repeat

+10

random

AM pre/tune

[45]

[46]

RDS

tuning

[42]

[44]

[45] AM button

[46] FM button

[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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PRODUCT FEATURES

[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

Tuner

All Others

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

Selects CD

POWER

MUTE

VOLUME UP

Power On/Off & Macro Power On/Off

Power On/Off

Mute Volume

Master Volume Up

Master Volume Down

Programmable

Surround Mode Select

Master Volume Up

Master Volume Down

Programmable

Surround Mode Select

VOLUME DOWN Master Volume Down Master Volume Down

TAPE

Selects Tape

Programmable

EXT 5.1

D. RANGE

STOP

Selects Ext 5.1

Dynamic Range adjust Programmable

Not programmable

Stop CD

MODE

Surround Mode Select

continued on opposite page.

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PRODUCT FEATURES

Remote Function Table

BUTTON

FUNCTION

Main

Tuner

All Others

PAUSE

Not programmable

OSD Right Select

OSD Scroll Down

OSD Left Select

Pause CD

Play CD

Programmable

Surround Backs On/Off

Programmable

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

Test Tone On/Off

Track 2

Track 3

Track 4

Track 5

Track 6

Track 7

Track 8

Track 9

Track 10

+10

TEST

BAL

Programmable

Selects Channel Trims

BACKS

REPEAT

RANDOM

Surround Backs On/Off Surround Backs On/Off Surround Backs On/Off

Not programmable

Selects Presets/Tuner

Enables RDS

Repeat Current Track Programmable

Random Play

Programmable

For Macro Use

Sleep

Programmable

Selects AM

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

Sleep

For Macro Use

Sleep

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

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

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.

36 | ADCOM OWNER’S MANUAL

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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]

E-mail: [email protected]

38 | ADCOM OWNER’S MANUAL

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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

www.adcom.com

GTP-830_v5.0

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