User`s manual

Dolby
®
CP650 Digital Cinema Processor User’s Manual Advanced Operations
A-2
Auditorium Assist
Checking Auditorium:
Left
Press OK to cancel
Auditorium Assist
L:OK C:OK R:OK
Ls: X SW:OK Rs:OK
Bsl:OK Amb:OK Bsr:OK
3. Auditorium Assist automatically begins the measurement
sequence, beginning with an auditorium noise floor
measurement, then cycling through all channels. The channel
being measured is displayed. The CP650 outputs pink noise at
85 dBC for the Left, Center, and Right channels; 82 dBC for
each of the surround channels; and +10 dBr for the subwoofer.
Note: The CP650 outputs pink noise to the auditorium speakers during the test.
4. Upon completion, channels are listed with OK for pass, or X for
fail. Any X (failure) indication is logged into the event log.
(See Section A.2.)
5. Press the illuminated format button to return to normal operation.
A.2 Displaying the Event Log
The event log provides useful information when explaining any problems to your
service engineer. The event log stores entries on the operation of the CP650. It can be
useful in troubleshooting or tracking subtle system failures. Also, Auditorium Assist
fail parameters are stored in the event log.
Normally, a single log entry occurs every time the CP650 powers on. When viewing
the event log display, the newest entries appear at the top.
1. Press multiple times, or press and hold the button while
rotating the front-panel knob to move to the event log.
2. Scroll through the event log using the front-panel knob.
Note: If film is running during CP650 power up, you may see erroneous information
entered into the event log. The power-up self-test software applies test signals
to the optical input circuits. If film is playing, the test signals are mixed with
film sound, producing unpredictable test results.
3. Press the illuminated format button to return to normal operation.
Event Log (newest)
00:00:00 Startup
10:20:36 Startup
36:09:03 Startup