Adcom GTP-760 Owner's Manual
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Adcom GTP-760 Owner's Manual

Adcom GTP-760 Owner's Manual

Digital processing tuner / preamplifier
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GTP-760
Digital Processing
Tuner / Preamplifier
OWNER'S MANUAL

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Summary of Contents for Adcom GTP-760

  • Page 1 GTP-760 Digital Processing Tuner / Preamplifier OWNER’S MANUAL...
  • Page 2 This page should be picked up from any Adcom manual second page (inside front cover)
  • Page 3 This equipment generates and uses radio frequency energy and if not installed and used properly (that is, in strict accordance with the manufacturer’s instructions), may cause interference to radio and television reception. It has been type tested and found to comply with the specifications Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference in a residential installation.

  • Page 4: A Note From Adcom

    CONCEALED SHIPPING DAMAGE Before your new GTP-760 left our factory, it was carefully inspected for physical imperfections and tested for all mechanical and electrical parameters as a routine part of ADCOM’s systematic quality control program. This should ensure a flawless product in both appearance and performance.
  • Page 5 PRELIMINARY INFORMATION Safety Information A Note from ADCOM The ADCOM Protection Plan Unpacking your GTP-760 PRODUCT FEATURES 1.1 Front Panel Controls Headphone jack Power button and LED Surround mode button and LED indicators Dialog Enhance button Dynamic Range button and LED indicators...

  • Page 6: Table Of Contents

    AC fuse holder AC power cord AC convenience outlet 1.3 The Remote Control...p. 19 INSTALLING/CONNECTING THE GTP-760 2.1 Physical Placement 2.2 Connecting Source Components to the GTP-760 INITIAL SETUP ...p. 29 3.1 The On Screen Display 3.2 CHANNEL DELAY 3.3 SPEAKER SIZE 3.4 CHANNEL BALANCE...

  • Page 7: Product Features

    PRODUCT FEATURES Front Panel Controls The GTP-760’s front panel is a model of simplicity. All controls are logically grouped for easy, intuitive operation. Familiarize yourself with the following diagram and read the short explanations of each feature. When you finish, you will be well on your way to enjoying the GTP-760’s convenience and sound quality.
  • Page 8 GTP-760 on a daily basis. We carefully designed this window to display only the data you need at the time you need it. The window’s configuration will change as you ask the GTP-760 to do different things. The display normally shows the input you’ve selected. If you’re currently listening to AM or FM radio, the display shows that signal’s frequency.
  • Page 9 The diagrams and notes in this section will probably answer most of your questions about interfacing the GTP-760 with other components in your system. You will find more detailed information on initial setup and configuration in following sections of the manual.
  • Page 10 GTP-760 is already properly set. Connect a video cable from one of the two yellow “standard monitor” video jacks on the back of the GTP-760 to the video input of your television. Turn on the GTP-760 and television and verify a blue colored screen. If you are unable to get the blue screen, consult your television owner’s manual to determine how to select the appropriate television input.

  • Page 11: Ld Input

    Antenna connections Digital audio/standard (composite) video inputs Digital 2 Digital 1 ( RF ) Digital 1 RF Demodulator switch 12 volt trigger output Analog audio/standard (composite) video inputs and outputs LD (laserdisc) inputs VCR inputs and outputs Video aux in Room 2 outputs Video Processor inputs and outputs Tape inputs and outputs...
  • Page 12 If you’re getting FM from a cable system feed, you will most likely use the “F” connector. The “T” shaped antenna supplied with the GTP-760 uses the push terminals marked “300 ohms.” “T” antennas are directional. They should be placed as high as possible with the arms fully extended.
  • Page 13 “dig.2 in” label. Digital 1 in (RF): We recommend this input for laserdisc players with a digital RF output. It is the only input on the GTP-760 equipped with the RF demodulator needed to process a laserdisc’s Dolby Digital encoded soundtrack.
  • Page 14 To facilitate remote turn-on and turn-off of other components (power amplifiers, for example), this 2.5 mm mini-jack provides a constant signal (12 volts DC) whenever the GTP-760 is fully powered. When the GTP-760 is turned off (via the front panel switch) or placed in standby mode (via the “power”...
  • Page 15 (Depending on the distance between the GTP-760 and the display device and, to a lesser extent, the video format you’ve chosen, you may need a video distribution amplifier to make sure the signal arrives at the display device properly.
  • Page 16 These line-level analog inputs allow easy connection of a CD player (or other two channel analog audio source.) Follow these instructions: 1) Connect the CD player’s left channel analog audio output to the GTP-760’s white “CD in” jack. 2) Connect the CD player’s right channel analog audio output to the red “CD in” jack.
  • Page 17 Note: This section assumes that you’ve elected to use S-Video sources and display devices and that you’ve set the GTP-760 for S-Video signal transfer by following the steps described in the boxed note entitled Composite or S-Video? on page 9.
  • Page 18 Video Processor On/Off Switch This switch controls a “video loop” that enables the GTP-760 to function with a separate video processor. For conventional home theater systems, make sure the “video processor on/off” switch is in the OFF position. When using a separate video processor, place this switch in the ON position.

  • Page 19: Channel Inputs

    Make sure to seat this cord firmly in an unswitched wall socket to provide uninterrupted power to the GTP-760. When removing the cord from an AC socket, NEVER pull on the cord itself. Instead, grasp the plug firmly and remove it from the socket. You may need to “rock” the plug lightly for easier removal.

  • Page 20: The Remote Control

    GTP-760 is fully operational (i.e., whenever the front power button’s LED is red.) They are not live when the GTP-760 is in standby mode (when the LED is yellow.) Observe the wattage limitations printed above the two switched and one unswitched outlets. Note that the 500VA figure (equivalent to 500 watts) above the two switched outlets is a maximum figure for both outlets combined.
  • Page 21 Level trim Rear Up/Down Center Up/Down Sub Up/Down Bal. chk (balance check) M1, M2, M3, M4 (Macro keys) Room 2 Backlight Mute Status LED light Adcom tuner/preamp main digital LD tuner power volume tape guide pause select play stop exit d.range...
  • Page 22 In all modes, these buttons change the master volume setting of the GTP-760. Tuning Up/Down • In tuner mode, these buttons are preprogrammed to scan up or down the GTP-760’s AM or FM band. • They are programmable for use with other sources.
  • Page 23 • In main mode, button is preprogrammed to call up or cancel “dialog enhance” equalization. • In CD mode, button is preprogrammed to begin and end “A-B” repeat with ADCOM CD player. • The button is programmable for use with any other source.
  • Page 24 • The button is programmable for use with any other source. M1, M2, M3, M4 (Macro keys) • In main mode, button is preprogrammed to select Tape 2 input (not applicable to GTP-760.) • The button is programmable for use with any other source.

  • Page 25: Remote Function Table

    Look down the left-hand column until you see the button you want to learn about. Then look under MAIN to see if it is preprogrammed for a GTP-760 function, under CD to see what CD commands are preprogrammed, and under TUNER to see all preprogrammed tuning functions.
  • Page 26 Press the appropriate function button (volume up, volume down, etc..) If you’ve selected a button that actually triggers a GTP-760 command, the main button will again flash red to confirm your choice. If the main button does not flash, you’ve selected a function button that isn’t preprogrammed.
  • Page 27 LED turns orange and the source selector button glows red. Both indica tors should remain lit. 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.
  • Page 28 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.

  • Page 29: Installing/Connecting The Gtp-760

    GTP-760 (and other audio/video components) away from moisture and out of direct sunlight. Bear in mind that the GTP-760’s rear panel is the central connecting point for almost every component in your audio/video system. Leave sufficient room behind the rear panel to accommodate cables, antenna leads, power cords, etc.

  • Page 30: Initial Setup

    The On Screen Display You will use the GTP-760 on screen display during this setup procedure. If you have not yet connected your television to the GTP-760, consult the box titled Composite or S-Video in Section 1.2. With this step successfully complete, your television and GTP-760 are on and the television screen shows a blue (composite video) or light gray (S-Video) screen.

  • Page 31: Speaker Size

    For many movie soundtracks the effect of this may be very mild, perhaps unnotice able. In others, it can be subtly distracting. To compensate for this, the GTP-760 can slightly delay the audio sent to the center and rear (closer) speakers. In this way, when playing Dolby Digital or Dolby Pro Logic soundtracks, the sound from all speakers arrives uniformly at the listening position as intended by the film’s producer[FD1].
  • Page 32 OFF: The speaker is inactive. Audio signals intended for speakers set to the OFF position are redirected to the main speakers. While there are a large number of setup possibilities, ADCOM has provided 3 factory presets that target the most typical installations.

  • Page 33: Channel Balance

    70 or 80dB. Place the meter, with microphone pointed upward, at the prime listening position as close as possible to ear level. Press the bal. chk button on the GTP-760 remote. The BALANCE CHECK menu will appear on the screen and the noise sequencer activates. (This menu essentially shows the same information as the CHANNEL BALANCE menu you just saw.

  • Page 34: Input Settings

    Using such an approach can sometimes lead to “pegging” the subwoofer trim to its highest level on the GTP-760 to compensate. It is better to use the sequencer to set the level of the main, center and rear channels, then use the external volume control on the subwoofer itself to balance it to the system. Fine- tuning of the subwoofer level may still be done in the CHANNEL BALANCE menu while listening to a 5.1...

  • Page 35: Basic Operation

    SETTINGS menu is the place to set the mode. In the example from section 1.2, a composite VCR and an S- Video DVD are to be used. Select the VCR input of the GTP-760. The VIDEO field should show COMPOSITE.
  • Page 36 When you are using analog inputs, you will probably need to manually select the proper operating mode. However, the GTP-760 remembers the mode you’ve most recently used for a particular input and will automatically restore that mode when you use that input next, software permitting, of course.
  • Page 37 Use the tuning buttons to select the station you wish to listen to. Programming “Preset” Stations. The GTP-760 can memorize up to 14 AM and 14 FM signals for instant recall. Place your favorite stations in memory by: Select either FM or AM as described above. Note the stations you want to preset. Starting at the lowest end of the frequency range (88.1 for FM, 520 for AM), tune to the first station you...
  • Page 38 GTP-760’s “Room 2” outputs. If one of the six source LED’s blinks, that source is already selected for room 2 distribution. (Note: You cannot direct a digital source —...

  • Page 39: Trouble Shooting

    AC line surges, etc. If you experience unexpected behavior, or if the GTP-760 “locks up” and does not respond to control input, reset it by turning the front power switch off. (Do not use the remote control’s “power” button.) Wait 10 seconds and then turn the GTP-760 on.
  • Page 40 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.

  • Page 41: Care, Maintenance, And Service

    For Fax inquires, please include a return Fax or voice telephone number for the reply. When calling or writing about your GTP-760, be sure to note and refer to its serial number, as well as the date of purchase and the dealer from whom it was purchased.

  • Page 42: Specifications

    Sensitivity for rated output...195 mV Subwoofer Low-Pass Output...100 Hz Power (available in 230V on special order)...120VAC/50-60Hz Chassis Dimensions...4"(102mm) x 17"(432mm) x 11 1/2"(292mm) Maximum Dimension...4 1/4"(108mm) x 17"(432mm) x 12 3/4"(324mm) Weight...16lbs. (7.3kg) Weight, Packed...19lbs. (8.7kg) GTP-760 Preamplifier Section General...
  • Page 43 This page has been interntionally left blank.
  • Page 44 10 Timber Lane Marlboro, NJ 07746 Tel: (732) 683-2356 Fax: (732) 683-9790 www.adcom.com (c) 2000 by ADCOM. All rights reserved. Printed in the USA GTP-760/v.1.0...

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