Adcom GTP-860 User Manual
OWNER’S MANUAL
up
tune/ prese t
down
surr ound mode
G T P - 8 6 0
v
ideo
5
vide o
4
vide o
3
vide o
2
vide o
1
FM
AM
ext
5.1
tape
moni tor
CD
surr ound
back
s
s-vi deo
vide o 5 in
L au dio
R
vide o
phon es
memo r
y
FM m ute/hi gh bl e
n
d
disp lay
bass
treb le
volum e
PR O L OG I C I I
GTP-860
Digital Processing Tuner/Preamplier
WELCOME
Dear fellow ADCOM product owner,
Welcome to the ADCOM family! For more than twenty years, ADCOM products have delivered
excellent performance and value for customers around the world. Our products are designed by
our experienced and demanding engineering team, built to the highest standards in our factory,
and sold and serviced through dealers, custom installers, and other retailers whose primary goal
is your complete satisfaction.
We know you are anxious to hear your new preamplifier in action, but please take a few minutes
to read this owner’s manual before connecting the preamplifier to your system. It is particularly
important that you connect your preamplifier to your amplifier and speakers while the amplifier and preamplifier is unplugged and your other equipment is turned off. This will protect your
equipment from potential short circuits that may occur during installion. In addition, it is important that you allow for adequate ventilation around your preamplifier and other equipment, since
excessive heat buildup can shorten the life of any electronic product, including the preamplifier.
Once you have correctly connected your amplifier and speakers to your new preamplifier, you
should be able to enjoy many trouble-free years of performance.
We conduct a thorough quality and performance test on each and every preamplifier we build
in our factory prior to shipment. In the rare case of a defect that may occur after shipment, we
stand behind our preamplifiers with a five-year parts and labor warranty. To register for this warranty, please complete and mail the enclosed warranty card back to ADCOM. Also, please keep
a copy of your sales receipt with the owner’s manual so you may provide proof of eligibility for
the warranty should the need arise.
We know you will be very happy with the sound and performance of your new preamplifier. We
hope you will also consider other ADCOM products, such as our line of preamplifiers and DVD and CD
players. In addition, we design and manufacture complementary products such as line conditioners/
surge suppressors and speaker selectors. Please visit our web site, www.adcom.com, to learn more
about our complete line of stereo, home theater, and distributed audio/video products.
On behalf of all of us at ADCOM, I want to thank you for selecting our product for your home or
business entertainment system.
Sincerely,
Douglas Klein
President
ADCOM
2 | ADCOM GTP-860 OWNER’S MANUAL
TABLE OF CONTENTS
WELCOME . .. . . .. . .. . ... . .. . .. . ... . .. . .. . . .. . .. . ... . .. . .. . .. 2
SAFETY INFORMATION .. . . .. . .. . ... . .. . .. . ... . .. . .. . . .. . .. . 4
INTRODUCTION & UNPACKING . . ... . .. . .. . ... . .. . .. . . .. . .. . 5
WARRANTY INFORMATION .. .. . ... . .. . .. . ... . .. . .. . . .. . .. . . 5
DESCRIPTION OF UNIT
FRONT PANEL DRAWING . .. . .. . ... . .. . .. . . .. . .. . ... . .. . .. . . 6
1.1 INTERFACE OVERVIEW .. . ... . .. . .. . ... . .. . .. . . .. . 7-10
REAR PANEL DRAWING .. .. . .. . ... . .. . ... . .. . .. . ... . .. . .. . 11
1.2 INPUTS & OUTPUTS SYSTEM CONNECTIONS .. . .. . 12-15
REMOTE CONTROL DRAWING . .. . ... . .. . .. . ... . .. . .. . . .. . . 16
2.1 OVERVIEW OF THE GRC-800 . ... . .. . .. . ... . .. . .. . 17-19
2.2 REMOTE FUNCTION TABLE ... . .. . .. . . .. . .. . ... . . 20-21
2.3 PROGRAMMING YOUR REMOTE CONTROL . . .. . .. . 22-23
2.4 PROGRAMMING MACRO BUTTONS .. . ... . .. . .. . . .. . .. 24
2.5 DISCRETE CUSTOM CODES FOR INSTALLERS . ... . .. . . 25
PLACEMENT OF THE GTP-860 . .. . ... . .. . .. . ... . .. . .. . . .. . .. . 25
OPERATION & SETUP
3.1 ONSCREEN DISPLAY . ... . .. . .. . . .. . .. . ... . .. . .. . . .. . 26
3.2 CHANNEL BALANCE . . . .. . .. . ... . .. . .. . ... . .. . .. . . .. 26
3.3 CHANNEL DELAYS ... . .. . .. . . .. . .. . ... . .. . .. . ... . 27-28
3.4 SPEAKER SETTINGS . ... . .. . .. . ... . .. . .. . . .. . .. . . 28-29
3.5 SURROUND SPEAKER PLACEMENT . . .. . ... . .. . .. . . .. . 30
3.6 INPUT SETTINGS ... . .. . .. . ... . .. . .. . . .. . .. . ... . .. . 31
TROUBLESHOOTING
RESOLVING PROBLEMS . . ... . .. . .. . ... . .. . .. . . .. . .. . ... . .. 32
TROUBLE SHOOTING . . .. . ... . .. . .. . ... . .. . .. . . .. . .. . ... . . 33
CARING FOR YOUR GTP-860 . . .. . . .. . .. . ... . .. . .. . ... . .. . . 34
SERVICE INFORMATION . . .. . ... . .. . .. . . .. . .. . ... . .. . .. . ... 34
GTP-860 SPECIFICATIONS . .. . .. . . .. . .. . ... . .. . .. . ... . .. . . 35
ADCOM GTP-860 OWNER’S MANUAL | 3
THE FOLLOWING PRECAUTIONS AND SAFETY INSTRUCTIONS
power lines
ground clamp
power service grounding
electrode system
(e.g. interior metal water pipe)
ground clamps
ground clamps
optional antenna grounding
electrode driven 8 feet (2.44 M) into
the earth if required by local codes.
bonding jumper, d
service
entrance
equipment
service entrance
conductors
standoff
insulators, b
mast
antenna
lead-in wire
antenna
discharge
unit, c
ground wire, a,b
to external antenna
terminals of radio receiver
ground wire, a,b
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT
OPEN
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT
OPEN
ARE REQUIREMENTS OF UL AND CSA SAFETY REGULATIONS
Warning: To reduce the risk of re or electric shock, do
not expose this unit to rain or moisture.
The graphic symbol of a lightning ash with an
arrow point within a triangle signies that there
is dangerous voltage within the unit and it poses
a hazard to anyone removing the cover to gain
access to the interior of the unit. OnIy qualied
service personnel should make any such attempt.
The graphic symbol of an exclamation point within
an equilateral triangle warns a user of the device
that it is necessary to refer to the instruction manual
and its warnings for proper operation of the unit.
Do not place this unit on an unstable cart, stand, tripod,
bracket, or table. The unit may fall, causing serious
injury to a child or adult, and serious damage to the
unit. Use only with a cart, stand, tripod, bracket, or
table recommended by the manufacturer or sold with
the unit. Any mounting of the device should follow the
manufacturer’s instructions, and should use a mounting
accessory recommended by the manufacturer.
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 its operating instructions should be adhered to.
All operating and use instructions should be followed.
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.
POUR PREVENIR LES CHOCS ELECTRIQUES NE PAS UTILISER CETTE FICHE
ATTENTION
POLARISEE AVEC UN PROLONGATEUR, UNE PRISE CE COURANT OU UNE
AUTRE SORTIE CE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES
A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.
CAUTION
TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH
AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE
BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
CAUTION POWER LINES
Any outdoor antenna must be located away from all power lines.
OUTDOOR ANTENNA GROUNDING
If an outside antenna is connected to your tuner or tuner/preamplier,
be sure 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. 701984, provides information
with respect to proper grounding of the mast and supporting structure,
grounding of the lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna discharge unit, connection to
grounding electrodes, and requirements for the grounding electrode.
a. Use No.10 AWG (5.3 mm2) copper, No.8 AWG (8.4 mm2) aluminum, No.17
AWG (1.0 mm2) copper clad steel or bronze wire, or larger, as a ground
wire.
b. Secure antenna lead-in and ground wires to house with stand-off
insulators spaced from 46 feet (1.221.83 m) apart.
c. Mount antenna discharge unit as close as possible to where lead-in enters
house.
d. Use jumper wire not smaller than No.6 AWG (13.3 mm2) copper, or the
equivalent, when a separate antenna grounding electrode is used. See NEC
Section 810-21 (j).
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE
INSTRUCTIONS CONTAINED IN ARTICLE 810. RADIO AND TELEVISION EQUIPMENT.
The unit should be installed so that its location or position does not interfere
with its proper ventilation. 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 installation, such as bookcase or cabinet, that may
impede the ow of air through its ventilation openings.
The unit should be situated away from heat sources such as radiators, heat
registers, stoves, or other devices (including ampliers) that produce heat.
The unit should be connected to a power supply outlet only of the voltage
and frequency marked on its rear panel.
The power supply 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 from the unit.
Clean unit only as recommended in its instruction manual.
The power supply cord of the unit should be unplugged from the wall outlet
when it is to be unused for a long period of time.
Care should be taken so that objects do not fall, and liquids are not spilled,
into the enclosure through any openings.
This unit should be serviced by qualied service personnel when:
A. The power cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled, into the unit; or
C. The unit has been exposed to rain, or liquids of any kind; or
D. The unit does not appear to operate normally, or exhibits a marked
change in performance; or
E. The device has been dropped, or the enclosure damaged.
DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This reminder is provided to call the CATV system installer’s attention to
NOTE TO CATV SYSTEM INSTALLER
Article 82022 of the National Electrical Code that provides guidelines for
proper grounding and, in particular, species that the cable ground shall
be connected to the grounding system of the building, as close to the
point of cable entry as practical.
INTRODUCTION
up
tune/preset
down
surround mode
GT P - 8 60
v
ideo
5
video
4
video
3
video
2
video
1
FM
AM
ext
5.1
tape
monitor
CD
surround
back
s
s-video
video 5 in
L audio
R
video
phones
memory
FM mute
/high b
len
d
displa
y
bass
treble
volume
PRO
LOGIC II
Congratulations on your decision to purchase the ADCOM GTP-860 tuner-preamplifier. The GTP-860 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. You
have made a wise choice that will reward you for years to come with exceptionally accurate and musical sound
reproduction. To realize the full potential of your new preamplifier, and before making any connections to it,
please read these operating and installation instructions thoroughly.
UNPACKING THE GTP-860
Before your new ADCOM tuner-preamplifier left our factory, it was carefully inspected for physical imperfections
and tested for all electrical parameters as a routine part of ADCOM’s systematic quality control. This, along with
full operational and mechanical testing, should ensure a product flawless in both appearance and performance.
After you have unpacked the GTP-860, 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 the preamplifier ever
need to be shipped again. In the unlikely event damage has occurred, notify your dealer immediately and request
the name of the carrier so a written claim to cover shipping damages can be initiated. 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.
GTP-860 Tuner/Preamp
✔
GRC-800 Remote Control
✔
with Batteries
GTP-860 Owners Manual
✔
and Warranty
ADCOM Power Cord
✔
Video 5 input cover
✔
FM Antenna/Balun Adapter
✔
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 benets. 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, or if the ADCOM Warranty Card is not
included in the carton, 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 way. Always retain your
original sales receipt as a proof of purchase.
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 worldwide patents issued and pending. “DTS,” “dts,” “DTS Digital Surround,” are trademarks of Digital Theater
Systems, Inc. Copyright 1996 Digital Theater Systems, Inc. All Rights Reserve
ADCOM GTP-860 OWNER’S MANUAL | 5
[1]
[9] [10] [11] [12] [13]
[4]
[3]
[2] [5]
[7] [6]
[5]
[8]
DESCRIPTION OF UNIT
FRONT PANEL
[1] Power Button
[2] Display Button
[3] FM Mute/High Blend Button
[4] Memory Button
[5] Tuner Up/Down Buttons
[6] Tune/Preset Button
[7] Display Window
[8] Volume Knob
[9] Headphone Output
& Video 5 Input
[10] Surround Backs Button
[11] Input Selector Buttons
[12] Surround Mode Button
[13] Bass/Treble Controls
6 | ADCOM GTP-860 OWNER’S MANUAL
1.1 Interface Overview
The GTP-860’s front panel is designed for ease of
display panel, and the station’s RDS name is automatically
displayed (RDS PS).
operation. All controls are logically grouped for easy,
intuitive operation. Familiarize yourself with the preced-
ing diagram and read the short explanations of each fea-
ture below. When you finish, you will be well on your way
to enjoying the GTP-860’s convenience and sound quality.
[1] 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 preamplifier on. From
the remote control, press the power button [30] to switch
the unit on (see remote diagram, page 20). The display
will light up indicating which input was selected and the
power button LED will turn red.
Pressing the Power switch again will turn the unit OFF
completely. The GTP-860 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.
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:
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 information such
as the presenter’s or program’s name; what song is play-
ing, etc. This text scrolls continuously over the 8 alpha-
numeric 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 reverting to the
default mode.
Press the Remote Control Power button [30] to switch the
unit from Operating to Stand-By mode. Press this button
again to switch to Unit On from Stand-By; the last select-
ed source will be indicated in the display.
The Power Button LED will light up amber when the
preamplifier is switched On, but in Stand-By mode.
NOTE: In Stand-By mode the GTP-860 uses very little power.
However, it is recommended that you switch the unit com-
pletely 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-860
is plugged into the wall current may still be flowwing into the
transformer. Only when the GTP-860 is unplugged is all current
into the device stopped.
[2] Display Button
The GTP-860 supports RDS PS and RDS RT. With stations
carrying RDS information, “RDS” will light up in the
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 Display button also has a secondary function: When
pressed and held for three seconds, the front panel dis-
play will dim. Press and hold the button again to turn the
display off, and again to set the display back to its
original brightness.
[3] 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 circuit will mute the tuner
in between radio stations when searching or tuning to
avoid tuning noise.
ADCOM GTP-860 OWNER’S MANUAL | 7
However, very weak radio station signals may be sup-
pressed 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 cir-
cuit by depressing the FM Mute/High Blend button will
allow the station to be heard and will cancel most or all
of this background noise.
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.
In combination with the Memory button [4] a preset
number can be emptied.
[4] Memory Button
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 [5] 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 sec-
onds “MEMORY” will stop flashing and the preamplifier
will default to its previous state.
To Store a Preset:
Tune to the radio station you wish to enter into a Preset.
If the station is transmitting RDS information, 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.
To store that station as a Preset, press Memory [4].
“MEMORY” and the preset section in the display panel will
start to flash. If no other button is pressed within 10 sec-
onds, “MEMORY” will stop flashing and the preamplifier
will default to its previous state.
Press the Down/Up [5] 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 [4] again. The
Memory light in the Display Panel will go out and the sta-
tion is now stored in your GTP-860’s memory.
To exit the Memory mode without storing a station, leave
all the tuner controls untouched; the Memory mode will
automatically cancel itself after 10 seconds. 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.
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.
Deleting a stored Preset:
You can empty a Preset by deleting the stored information:
• Press Memory button [4]
• Select the Preset to be emptied by pressing the Up/
Down buttons [5].
Press FM Mute/High Blend button [3]. The Preset will then
be deleted and ‘—‘ appears as the Preset number.
[5] Tuner Up/Down Buttons
The function of these buttons depends on the tuning
mode selected with the Tune/Preset button [6]. 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 high-
est number Preset, the tuner will go to the lowest Preset
number or vice-versa when tuning either up or down.
b) Tune mode: Press the “Up” or “Down” button for more
than 1/2 second to engage automatic tuning respectively
up or down the frequency band. The tuner will search
automatically for the first reasonably strong radio station,
where it will stop. Press the Down/Up button again for
1/2 second to start searching again.
NOTE: Automatic tuning is available on both FM and AM.
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 frequency. With each suc-
cessive tap of the keys, the tuner will take 0.05 MHz steps
on FM so you can accurately tune into the desired fre-
quency. 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
8 | ADCOM GTP-860 OWNER’S MANUAL
search mode. When tuned accurately to a station,
“TUNED” will light up in the display.
[6] 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 [5] description for more information.
[7] Display Window
The display area shows all vital information when the unit
is operational.
[8] Volume Knob
The Volume control adjusts the overall loudness of the
signals being fed to the preamplifier outputs. Unlike con-
ventional controls, the GTP-860’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 [34]. 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 display defaults to its previous status. Volume setting
can range from -61dB to +18dB.
REMEMBER: Listening at high levels can damage your hearing.
The video five input is located on the front panel to sim-
plify connection of a camcorder or a video game console.
To select video five, push the corresponding front panel
button in the input selector section.
[10] Surround Backs Button
Pressing this button engages ADCOM’s proprietary 7.1m²™
decoding algorithm. The 7.1m²™ decoding process mixes
the signals from the left surround and right surround chan-
nels to derive two unique signals sent to each back output.
The benefit of our 7.1m²™ decoding process is enhance
imaging between the surround speakers and the creation
of a more diffuse ambient sound field. The 7.1m²™ pro-
cess has the same benefits when compared to other matix
decoding as stereo signals have over mono signals. The
7.1m²™ process can also be used to drive your surround
back speakers when you are listening to an externally
decoded DVD audio or SACD multi-channel disc. Due to
the varying nature of film soundtracks and music, you may
prefer to activate or deactivate the surround back chan-
nels. For example, Dolby Digital 5.1 and DTS soundtracks
benefit greatly from the addition of the 7.1m²™ process-
ing. Prologic soundtracks on the other hand provide a
mono surround signal track, which yields a less satisfying
experience when using the surround back channels.
On the remote control, press the Mute button [32] to
temporarily switch off the sound to the Preamp outputs
and headphones. Mute mode is indicated 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.
[9] Headphone Output/Video 5 Input
A 1/4” stereo jack socket is provided for headphone lis-
tening and will work with conventional headphones of any
impedance. The volume and tone controls are operative
for headphone listening. Use a suitable adapter to con-
nect 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: Head phones are only LF RF output. If listening to
5.1 material center channel should be turned off.
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 func-
tions from the remote control. Be sure to experiment to
find the balance that best suits your taste.
[11] Input Selector Buttons
These buttons select the active video and audio input for
the GTP-860. The source that is currently selected will be
shown in the front panel display and the LED in the source
button will be red. The currently selected source signal
is sent to the main preamp outputs after processing and
the video 3, video 4, aux and tape outputs. If an input
has both digital and analog input capabilities the GTP-
860 will give priority to an existing digital signal, and in
the absence of a digital signal will default to the analog
connection. Video signals associated with an input give
priority to s-video sources over composite video signals.
The video one and video two inputs also have component
video switching capabilities. This component video
ADCOM GTP-860 OWNER’S MANUAL | 9
switching is independent of the composite/S video signal
and does not support on-screen display messages.
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 headphones
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.
The Tape Monitor function does not override the current
input selection that is sent to the tape outputs. When the
Tape Monitor is selected, you are listening to the signal
that is coming back into the Tape Input jacks. The cur-
rently 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 affect-
ing the recording process. When Tape Monitor is selected,
the button will remain lit until Tape Monitor is
disengaged again.
[12] Surround Mode Button
With the Surround Mode button the available surround
sound modes can be selected. The selected surround
mode is permanently indicated in the display 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:
Stereo: The Stereo mode provides straight two channel
listening. With an analog source, it bypasses all process-
ing. With a digital input, only the bass-management
filtering is applied.
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.
Pro Logic II: Dolby Pro Logic II is the new advanced ver-
sion of Prologic, Dolby’s original surround matrix with cen-
ter channel output. Prologic II has enhanced imaging and
wider bandwidth surround signals than original Pro Logic.
Dolby Pro logic II is intended for use with most movies and
television programs that are designed to be listened to
using Prologic decoding. In addition to the standard Dolby
Prologic II, the GTP-860 supports three enhanced versions
of Prologic II processing, which were designed for specific
types of programs. “Prologic II Music” mode was designed
for use with regular old stereo recordings and it can utilize
all you speakers in your system when listening to a CD.
“Prologic II Movie” is an enhanced version of Prologic II
decoding with settings optimized for movies and televi-
sion. “Prologic II Panorama” is a version of Prologic II that
is intended for use with Movie playback that spreads the
images from the front left and right speakers around to the
surround speakers. “Prologic II Matrix” creates a surround
sound signal from mono sources.
5 ch Stereo: This mode is designed for use with stereo pro-
gram material. It is designed to get maximum output from
all your speakers. The rear speakers are driven with the
same signal as the front left and right, while the center
speaker is a monophonic summation of the front speakers.
With any of the Digital Inputs, the GTP-860 automatically
recognizes if the selected source carries a Dolby Digital™
or DTS™ signal. Dolby Digital and DTS have six indepen-
dent channels available in total: Left, Center, Right,
Surround Left, Surround Right and an “Effects Channel”
(Subwoofer). With either Dolby Digital 5.1 or DTS digi-
tal 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.
[13] Bass/Treble Controls
The GTP-860 is fitted with Bass and Treble tone controls
to adjust the overall tonality of your system. The 12
o’clock position is ‘flat’ with no boost or cut and a
detent indicates this position.
Rotate the control clockwise to increase the amount of
Bass or Treble. Rotate the control counter-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.
10 | ADCOM GTP-860 OWNER’S MANUAL
[14]
[20]
[22] [23] [18] [24]
[26]
[28]
[27]
[21]
[15] [16] [17] [25]
[19]
DESCRIPTION OF UNIT:
REAR PANEL
[14] Antenna Connections
[15] Preamp Outputs
[16] Auxiliary Outputs
[17] Monitor Outputs
[18] Video/Analog Audio
Inputs & Outputs
[19] Component Video
Inputs & Output
[20] Multi-Zone Source Outputs
[21] Tape Inputs and Outputs
[22] CD Analog Inputs
[23] External 5.1 Analog Inputs
[24] Digital Audio Inputs
[25] AC Power Cord
[26] 12V DC Trigger
[27] Voltage Switch
[28] IR Input
ADCOM GTP-860 OWNER’S MANUAL | 11
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