User`s manual

Dolby
®
CP650 Digital Cinema Processor User’s Manual Operating Instructions
2-4
2.1.2 Level Display
The main fader level is displayed as a two-digit number. Starting at 0.0, the level
increases as the fader knob is rotated clockwise. As with previous generations of
Dolby cinema processors, a fader setting of 7.0 is the correct operating level. This
setting matches the level used during production of the film.
2.1.3 Main Fader Knob
Use the main fader knob to adjust the sound level. As the main fader is turned, the
numbers on the display move from 0.0 to 10. A fader reading of 7.0 is the correct
operating level. The main fader knob rotates continuously with no end stops. The
knob is also used to choose various menu items during setup operations.
2.1.4 Projector Signal Indicators
P1 and P2 show which projector analog optical sound input has been selected by the
CP650.
2.1.5 Bypass Power Supply Failure Indicator
The bypass power supply failure indicator turns on if a problem is detected in the
bypass power supply circuitry.
2.1.6 Bypass Power Button
The bypass power button operates the main power supply for the CP650. In the ON
position, the CP650 is powered by the main supply. As with other Dolby cinema
processors, the CP650 has a separate backup (bypass) power supply. In the OFF
position, the unit is powered by the built-in bypass power supply, and the power
button glows red. It also glows red if a fault is detected during normal operation
(power button in the O
N position), indicating that the unit has automatically switched
to bypass operation.
2.1.7 Format Buttons
The following format buttons are used to select the desired film sound format:
•
01—Mono.
• 04—Dolby A-type.
• 05—Dolby SR.
• 10—Dolby Digital.
• 11—External six-channel input signal.
• U1, U2—Set by the user.
• NS—Nonsync, for intermission music CD, tape, and so on. It is usually set as
format 60, but it can be set to other formats.
Any available format can be assigned to the
01, 04, 11, U1, U2, or NS buttons. See
Section 2.2.8.