User`s manual

Dolby

CP650 Digital Cinema Processor User’s Manual Maintenance and Calibration

3-4

Saving Changes.....

...

Manual L O O R

Level

● O

O O XX

4. Press to select the Right channel, and adjust in the same

manner. The number displayed on the bottom line will move

to the Right-channel column.

5. Press OK to save your level settings for projector 1.

6. Stop the projector, and load and run Cat. No. 69T film loop on

projector 2, if so equipped.

7. Press to move the menu to Manual Optical Level Adjust for projector 2,

and repeat the above procedure for the Left and Right channels.

8. Press

OK to save your level settings for projector 2.

9. Press the illuminated format button to return to normal operation, which also cancels

muting.

3.3 Film Print Cleanliness

A high-quality theatre system outfitted with Dolby equipment is like a high-quality

home stereo system: it can sound only as good as the program material playing

through it. Just as a good home stereo clearly reproduces the annoying pops and

clicks on poorly received radio signals, a good theatre system reproduces pops,

crackles, and other noises from worn and dirty film prints.

If you receive a poor print from your distributor, there is little you can do except, if

possible, arrange a replacement. While a print is in your theatre, however, you should

always treat it with respect and care to be sure your audiences receive the best in both

sound and picture. The print should be kept as clean as possible when it is played,

when it is stored between shows, and when a platter reel is prepared. In particular,

when individual reels are unwound to make up a platter reel, do not let the film touch

the floor or come in contact with other sources of dust and dirt.

The Dolby Digital print format has robust error-correction information encoded along

with the audio data, and the CP650 uses a powerful digital error-correction technique,

allowing the data to be decoded perfectly even if scratches and dirt are present.

However, best performance will be obtained if the print is kept clean. Standard film

cleaners provide good results.