Instruction manual
26
P-2000 7.1 Channel Preamp/Processor/Tuner
Instruction Manual
27
Channel Calibration
The next step is to adjust the output level of each channel so that they are
properly matched. This must be done to insure a correct presentation of
multi-channel sound sources. The adjustment must be as precise as possible,
and is almost impossible to accomplish by ear. Therefore, we recommend that
you use a Sound Level Meter. This device insures that all loudspeaker levels
are precisely matched and set accurately. (At this writing Radio Shack has an
Analog Sound Level Meter that is inexpensive and suitable for this task.)
NOTE:
If for any reason you are not sure that you can accomplish
this calibration task or have any doubts as to how it should be done,
please contact Atlantic Technology’s technical support BEFORE
attempting this process.
Set the meter to Slow response and “C” weighting. Set it to the 70 or 80dB
sensitivity scale. Position the meter at the approximate center of your listening
area, at average ear height [approximately 40-46 inches (102-117 cm)] with
its microphone positioned vertically (pointing at the ceiling). Don’t aim the
microphone at the speakers, as this will produce inaccurate results.
To proceed with the adjustments, you will access the Channel Calibration
menu shown below.
Figure 3
CHANNEL CALIB
> LEFT FRONT : 0dB
CENTER FRONT : 0dB
RIGHT FRONT : 0dB
RIGHT SURR : 0dB
RIGHT BACK : 0dB
LEFT BACK : 0dB
LEFT SURR : 0dB
SUBWOOFER : 0dB
RETURN TO MAIN MENU
With no source playing, set the volume level of the P-2000, using the main
volume control, to 0dB.
To set the channel levels for you system:
1.
Press the MENU button to enter the Main Menu.
The Main Menu appears on the Front Panel Display and the OSD.
The cursor on the OSD should be pointing to the Input Conguration
menu and
INPUT CONFIG
appears on the Front Panel Display.
2.
Press the button until the Channel Calibration menu is
selected.
The cursor on the OSD should be pointing to the Channel Calibration
menu and
CHANNEL CALIB
appears on the Front Panel Display.
3.
Press SELECT to enter the Channel Calibration menu.
The Channel Calibration menu appears on the Front Panel Display
and the OSD (see gure 3). The selected menu item should be
LEFT FRONT
.
A special test tone will be generated allowing you to measure the
output of the speaker that’s playing.
Note: If the test tone is too loud with the main volume level set at
0dB, exit by pressing the MENU button twice, then reset it to –10dB
and proceed with the calibration as described.
4.
Use the < and > buttons to adjust the speaker level.
You can adjust the selected channel level in 1dB steps across a range
of -15dB to +10dB. The recommended calibration level is 75dB/SPL
as displayed on the meter.
Note: If you set the main volume level to -10dB, use 65dB/SPL as your
calibration level.
5.
Press the button when you have nished making the Left
Front level adjustment.
Repeat steps 5 and 6 until you have completed setting the level for
each speaker in your system. Use the same calibration level for all
speakers.
6.
When you have finished adjusting the level for all the
speakers in your system, press the button to select the
Return to Main Menu option.
7.
Press the SELECT or MENU button to return to the Main Menu,
or press the MENU button twice to exit.
You can also perform this calibration at any time by using the built in test
tone, by pressing the TEST TONE button the front panel of the P-2000 or
the remote control.
To set channel levels using the Test Tone function:
1.
Press the TEST TONE button on the front panel or TEST button
on the remote.
This will produce a display that shows:
TEST TONE
LEFT FRONT : 0dB
When you select this function, the P-2000’s Test Tone will automati-
cally cycle every few seconds through all the speakers, skipping those
congures as “None.”
The unit cycles through the speakers in the following sequence:
LEFT FRONTCENTER FRONTRIGHT FRONT RIGHT
SURR(OUND)RIGHT BACK (SURROUND)LEFT BACK
(SURROUND)LEFT SURR(OUND)SUBWOOFER
2.
Use the < and > buttons to adjust the speaker level.
You can adjust the selected channel level in 1dB steps across a range
of -15dB to +10dB.
While you are adjusting each speaker, the Test Tone will remain on
that channel until you have stopped changing the volume for a few
seconds. The unit will then resume cycling the Test Tone from speaker
to speaker, until you touch the TEST TONE button again.
NOTE: Speakers that you selected “None” for in the Speaker Cong
menu will not appear.
3.
Press the TEST TONE button on the front panel or the TEST
button on the remote control again to exit the Test Tone
function.
System Setup