Dolby
®
Model CP650 Installation Manual
B-Chain Alignment
4-3
Format 10 (Install)
(Install)
(Install)
(Install)
Dolby Digital
----- M 0
4.3 Initial
Setup
POWER AMPS
Off
Set all the gain controls on all power
amplifiers to a known, repeatable setting.
The
preferred setting for most amplifier gain
controls is maximum.
If a different setting is required in order to
optimize the noise performance of the system,
the controls should be locked in position or
marked clearly.
Caution
: The following steps will cause the CP650 to output pink noise to the power amplifiers. The
CP650 output levels may be set too high. If you are unsure of the settings on your unit, turn off the
power amplifiers before selecting the “Calibrate SPL” menu item shown in Section 4.4 below. Then,
select and observe the present output level adjustment settings. (Press left menu button two times while
the unit is in setup mode.)
Mic Bypass
Video Clamp
Ch 1
Ch 2
GND
RTA1 RTA2
1 2 3
7
4 5 6
8
SIGNAL
PRESENT
Lt
Rt
Lt
Rt
Oscilloscope
Connect an oscilloscope to the following test
points located on the setup panel:
RTA1
-to-scope channel 1
RTA2
-to-scope channel 2
Set the oscilloscope to display both channels. Use
the “chop” mode instead of “alt” mode for the
best display results.
Apply power to the CP650.
1 2 3
7
4 5 6
8
Slide DIP switch-6 to the up position. This
switches the CP650 into setup mode.
“(Install)” appears on the display screen.
MIC 1
If a microphone multiplexer is being used, select
MIC 1.
