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What this section is all about . . .
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.
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.
Depending on your source and/or the television sys-
tem used you must first select the correct video sys-
tem. If the OSD rolls over the screen you must
select another system: PAL or NTSC.
While pressing the Memory button [04] on the front
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:
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 is used to choose the desired option.
Otherwise, highlight EXIT and press Select to leave.
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.
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
the channel balance level make sure the master
volume is turned down to a normal listening level.
Pressing the Test button engages the Test signal
generator to allow for adjustment of all speaker
levels, so that each channel can be adjusted for
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.
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.
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
GTP-830 DIGITAL PROCESSING TUNER/PREAMPLIFIER
30 | ADCOM OWNER’S MANUAL
SETUP
1 INPUT SETTINGS
2 CHANNEL BALANCE
3 CHANNEL DELAYS
4 SPEAKER SETTINGS
5 EXIT