6-6
Exception–CP45s built before mid-1997:
The DA20 will not automatically switch the
CP45 into Format 10 if Format 01(mono) has been selected.
The DA20 will continue to assert Format 10 after any film format assertion so as to keep
the CP45/CP65/CP500 in Format 10 as long as valid digital data is available.
Once the DA20 has asserted Format 10, if valid digital data is no longer available, then the
DA20 will revert to analog by asserting Format 05 to the CP45/CP65/CP500. At this
point, an automation system or operator can assert any format. The DA20 will not re-
assert Format 10 until valid digital data is again available.
To disable the automatic selection of Format 10 by the DA20, two methods are provided
on the CP45/CP65 and one on the CP500:
(CP45/CP65/CP500): The user can rotate the CP Type switch to position 6. This disables
the ability of the DA20 to assert any format commands except those associated with
reversions (i.e. Format 05 when valid digital is lost and Format 10 when valid digital
returns).
CP45/CP65 only: The user can press and hold the Format 05 button on the CP45/CP65
for at least 4 seconds. After 4 seconds has elapsed, the green ‘Digital’ LED on the DA20
will go off. At this point, the CP45/CP65 will be in Format 05 and any format can be
selected without the DA20 forcing the CP45/CP65 back into Format 10. Format 10 can
again be selected from the CP45/CP65 and the DA20 will go into Format 10.
To re-enable the automatic selection of Format 10 after it has been disabled by pushing
the Format 05 button, either the DA20 must be turned off and then on again or the CP
Type selector switch must be rotated away from and back to position 2.
CP200:
Since Format 10 can reside on any of the four format selectors on the CP200, the operation
of the DA20 with this Cinema Processor is different.
When power is first applied to the DA20 with the CP Type switch set to position 3, the
DA20 will sequentially select formats A through D, looking for Format 10. The DA20 will
remember which format selector is set to Format 10 and will select this format whenever
valid digital data is detected. The DA20 will scan the four format selectors up to 10 times.
If no Format 10 is detected, the DA20 will disable the auto-digital feature as it will not
know which format selector to assert.
As soon as the DA20 detects Format 10 on one of the format selectors, it will stop
scanning the CP200 and begin normal 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 as indicated by the
state of the Format Buss line.
• The DA20 is decoding valid digital data.
