Dolby Laboratories DA20 사용자 설명서 - 페이지 12

{카테고리_이름} Dolby Laboratories DA20에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Dolby Laboratories DA20 18 페이지. Digital film sound processor

will remember which format selector is set to Format 10 and will select this format

whenever the CP200 is in any film format and valid digital audio is. If Format 10 is not

detected on one of the format selectors, the DA20 will operate in Auto Digital Disabled

mode. Once this occurs, if the user wishes to enable the Auto Digital mode, one of the

CP200 format selectors must be programmed to Format 10 and the CP Type switch on the

DA20 must be rotated out of and then back into position 3. This will cause the DA20 to

again scan the CP200 format selectors.

As soon as the DA20 detects Format 10 on one of the format selectors, it will stop

scanning the CP200 format selectors, and begin Auto Digital operation. In either case, the

CP200 will be left in whatever format is selected by selector D, regardless of the wakeup

format chosen on the CP200.

If Format 10 is detected on one of the format selectors, the DA20 will automatically assert

that format whenever the following conditions are met:

• The DA20 detects that the CP200 is in Format 01, 04, or 05.

• Digital audio is available.

If all of the above conditions exist, the DA20 will automatically assert Format 10 thus

eliminating the need to cue Dolby Digital films or trailers. If a different film format is

selected on the CP200 while valid digital audio is available, the DA20 will again select

Format 10 to keep the CP200 in Format 10.

After the DA20 has switched the CP200 to Format 10, if valid digital audio is no longer

available, the DA20 will cause a reversion. Though the format selector on the CP200

which is programmed to Format 10 will remain selected, the yellow 'Analog" LED will

light and the audio signal path will switch to the analog SR track. At this point, an

automation system or operator can assert any format. The DA20 will not re-assert Format

10 until digital audio is again available.

To disable the automatic selection of Format 10 by the DA20, two methods are provided

in CP200 installations.

First, the CP Type switch can be set to position 7 (CP200 Auto Digital Disabled). This

disables the ability of the DA20 to assert any format commands except those associated

with analog reversions when in Format 10.

In emergency situations , the 'GO' button on the CP200 can be pressed and held for at

least 4 seconds. After 4 seconds has elapsed, the green 'Digital" LED on the DA20 will go

off and the 'Analog' LED will flash. At this point, the CP200 will be playing the analog

SR track and any format can be selected without the DA20 forcing the CP200 back into

Format 10. If Format 10 is again selected, the DA20 will remain in analog mode thus

forcing the CP200 to play the analog SR track. Auto-digital mode can not be re-enabled

unless the DA20 is turned off and then on again or the CP Type switch is rotated out of

and back into position 3. This will cause the DA20 to re-scan the CP200 format selectors

and look for Format 10 again and therefore should not be done while film is playing.

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