Specifications

7-8

digital system, the performance is perfect up to the limits of error correction, and

then degrades very rapidly. Should the digital data become corrupted beyond

correction through perforation damage, concealment techniques are applied for up

to 4 perforations (40 ms), after which time the CP500 switches to passing analog

audio. Corrected digital data must remain valid for a period of time before

switching back to the digital track.

7.12 Automatic Selection of the Dolby Digital Format

CP500s equipped with versions 1.30 or later software can be set up to sense the

presence of Dolby Digital data on the film and automatically switch to Dolby Digital

from any other format. The section begins with a basic look at how to use this

feature with the standard setup. The latter part of this gives a full explanation of the

auto-digital operation and shows how to modify the operation when using a custom

set-up.

7.12.1 A Quick Look at Operation With Standard

Set-up

The Standard format control screen on the CP500 comes with Formats 01 (Mono),

04 (A-Type), and 05 (Dolby SR) set up so that auto-digital will occur from them.

These formats are marked by an “s” for sources on the screen.

Format 10 is the format that the auto-digital system will switch to when good Dolby

Digital data is detected. It is marked with an “a” (for automatic) on the screen. In

this case, Format 10 is defined as the “target” format. For more information on

target formats, see Section 7.12.2.

To enable the auto-digital feature:

SK7

Press Menu.

Then, press SK7.

Pressing SK7 alternately enables and

disables the auto-digital feature.