Adcom GTP 600 Owners Manual

Page 2

THE FOLLOWING PRECAUTIONS AND SAFETY INSTRUCTIONS
ARE REQUIREMENTS OF UL AND CSA SAFETY REGULATIONS

Warning: To reduce the risk of tire or electric shock, do not expose
this unit to rain or moisture.

RISK OF ELECTRIC SHOCK '
DO NOT OPEN

>

AVIS: RISQUE DE CHOC ELECTRIOUE-NE PAS OUVFIIR

The graphic symbol of a lightning flash with an arrow
pornt WIIIIln a triangle signifies that there is dangerous
voltage within the unit and it poses a hazard to anyone
removing the cover to gain access to the interior oi the
unit.0nly qualified service personnel should make
any such attempt.

The graphic symbol at an exciamalion point within an
equltateral triangle warns 3 USE! OT 19 DEVICE that II '5
necessary to reler to me instruction manual and its
warnings tor proper operation ot the unit.

00 not place this unit on an unstable can. stand. tripod.
bracket. or table. The unit may tall. causmg 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 manulacturer. or sold with the
unit. Any mounting cit the devlce should iollow the man-
ufacturers instructions, and should use a mounting ac-
cessory recommended by the manufacturer.

@9%

Read all the salary and operatil'lg insuuctiuus bulule wuneuling or using
this unit.

Fietaln this notice and the owner's manual tor luture relerence.
All warnings on the unit and in its operating instructions should be adhered to.
All operating and use instructions should be tollowed.

Do not use this unit near water: Ior example. near a bathtub. washbowl.
kitchen sink. laundry tub. in a wet basement. or near a swimming pool.

The unit should be installed so that its location or position does not interlere
with it: pther ventilation. For example. it should not be situated on a bed.
soia. rug. or similar surlace that may block the ventilation openings: or
placed in a built-in installation. such as bookcase or cabinet. that may
impede the llow oI air through its ventilation openings.

The unit should be situated away lrorn heal sources such as radiators. heat
registers. stoves. or other devices (including amplifiers) that produce heat.

The unit should be connected to a power-supply outlet only oi the voltage
and lrequency marked on its rear panel.

The power-supply oord 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 oower-suDoly cord ol the unit should be unplugged trim the wall outlet
when It is to be unused lor a long period of time.

Care should be taken so that objects do not tall. and liquids are not spilled.
into the enclosure through any openings.

This unit should be serviced by qualified service personnel when:
The power cord or the plug has been damaged; or

Objects have fallen, or liquid has been spilled. into the unit: or
The unit has been exposed to rain. or liquids at any kind; or
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.

m one?

DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF,
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

ATI'E NTION

POUFI PREVENIFI LES CHocs ELECTRIQUES NE PAS UTILISER
CETTE FICHE POLARISEE AVEC UN PROLONGATEUFI. UNE PRISE
DE COURANT ou UNE AUTRE SORTIE DE COURANT, SAUF Sl LES
LAMES PEUVENT ETFIE INSEREES A FOND SANS EN LAISSER AU»
CUNE PAFITIE A DECOUVERT.

CAUTION

TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG
WITH AN EXTENSION CORD. RECEPTACLE OR OTHER OUTLET UNr
LESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE
EXPOSURE.

CAUTION

POWER LINES
Any outdoor antenna must be located away trom all power lines.

OUTDOOR ANTENNA GROUNDING

It an outside antenna is connected to vour tuner or tuner-preamplifier. be
sure the antenna system is grounded so as to provide some protection
against voltage surges and built~up static charges. Section 810 or the
National Electrical Code. ANSI/NFPA No, 70-1984. provides inlormation with
respect to proper gmunding ot the mast and supporting structure. grounding
oi the lead-in wire to an antenna discharge unit. size 01 grounding
conductors. location of antenna discharge unit. connection to grounding
electrodes. and requirements for the groundlng electrode.

a. Use No.1!) awe (5,3 mm) copper. No.8 AWG (5,4 mm} aluminum.
No.17 AWG (1.0 mm) copper-clad steel or bronze wire. or larger. as a
ground wire.

it Snmlrn antenna load-in anrl grnllnrt wires in hnltse with slant-Lott
insulators spaced from 4-6 leet (La-1.83 m) apart.

c. Mount antenna discharge unit as close as possible to where lead-in
enters house.

it. Use jumper wire not smaller than No.6 AWG (13.3 mm) copper. or the
equivalent. when a separate antenna-grounding electrode is used. See NEC
Section 810-21 (j).

EXAMPLE OF ANTENNA GROUNDING AS PER NATUNAL ELECTRICAL CODE INSTRUCTIONS
CONTAINED IN ARTICLE 810 - RADIO AND TELEVISION EQUIPMENT

POWER LINES

SERVICE ENTRANCE
GONDUOTDHG

/

sumac:
INSULATORS. b

MAST
n

SERVICE ANTENNA
ENTRANCE LEADIN WIRE
EQUIPMENT

ANTENNA
DISCHARGE
UNIT. 1:

T0 EXTERNAL ANTENNA
TERMINALS OF RADIO RECEIVER
POWER SERVICE GROUNDING
ELECTRODE SYSTEM GROUND WIRE. at)
(a. q. imellor metal water pipe)

GROUND CLAMPS
BONDING JUMPER. d
OFTIDNAL ANTENNAGROUNDING
ELECTRODE DRIVEN B FEET (2. M) "TO
THE EARTH IF REQUIRED EV LOCAL
MOSS. SEE NEG SECTION 810~2l (I)

NOTE TO CATV SYSTEM INSTALLER

This reminder is provided to call the CATV system installer's attention to
Article 820-22 oi 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 ol the building, as close to the point at
cable entry as practical.

Page 16

27)

D) The test tone will shift to the rear speakers I lse the Rear Level Up and Rear Level Down" buttons 6 to
adjust rear channel output to match that of the front left. center, and front right speakers.

Youll probably need to let the Balance Check test tones cycle through all speakers three or four times until you've
matched levels closely. Don't worry about how fast you can accomplish this balance adjusllnent - just take your
time and do it carefully.

NOTE: DO NOT PLAY ANY OTHER SOURCE THROUGH THE GTP-GOO WHEN USING THE BALANCE CHECK
CiFtCUIr it you I teed to check balances when playing a source. srmply put the source on "Pause." go through the
balance check routine. then resume playing the source

SURROUND and DELAY CHOICES:

The GTP-6OO is an enormously flexible unit. This section is the most subjective in the entire Owner's Manual: Feel
free to take the suggestions here as starting points for your own experimentation. Above all. enjoy!

A) Choosrng the proper operating mode;

The GTP-6OO provides seven operating modes selected by the Surround" button on the front panel 3 or the
remote controller t3. These are: Cinema. Dolby Pm logic. Stadium. Concert Hall, Nightclub. 5 channel
stereo, and Bypass (2 channel stereo.) Each of the first six modes is indicated by a front panel LED. (The
Cinema mode displays two LEDs - one to the left of Cinema" and the second to the left of Dolby Pro
Logic") in Bypass. or 2 channel stereo. no Mode LED lights.

1) CINEMA: This ADCOM circuit enhances the dimensional accuracy of Dolby Pro Logic decoding with

proprietary signal processing techniques to more closely approximate the acoustical soundfield of a
large movie theater.

A shelving filter with a corner frequency of 7 kHz reduces the often excessive high frequencies that make
some video soundtracks fatiguing to listen to. In addition. Cinema mode adds diminishing multiple delays
through the rear speakers to diffuse the surround information even further ll tan is possible through Dolby
Pro Logic.

Left & right front output: enhanced Pro Logic matrix
Center channel: Yes

Initial rear delay setting: 30 milliseconds

Additional delay choice: 20 milliseconds

2) DOLBY PRO LOGIC is one of the two preferred modes for properly processing Dolby Surround encoded
video soundtracks. a growing number of CDs. and even the audio portion of some computer gamestr in

this mode. the GTP-GOO presents a spatially correct soundstage with precise lateral imaging and front to
back depll 1.

Left & right front output: Pro Logic matrix
Center channel output: Yes

Initial delay setting: 20 milliseconds

Additional delay choices: 30 & 15 milliseconds

3) STADIUM is used for non-Dolby Surround encoded material and recreates a large and acoustically
reverberant environment well suited for video sporting events and playback of music that is usually
performed in large outdoor arenas. A slight upper midrange frequency emphasis is added to the front

channels to enhance intelligibility STADIUM mode is also well suited for playback of older epic movies
with mono soundtracks.

Left & right front output: Wide matrix

Center channel output: No

lnitial delay setting: 75 milliseconds

Additional delay choices: 100 & 50 milliseconds