Instruction manual

1-6
• The DA20 detects that the CP45/CP65/CP500 is in a film format (01, 04, or 05).
• Dolby Digital Audio is available.
• No format buttons are pressed.
If all of the above conditions exist, then the DA20 will automatically switch the cinema
processor to Format 10, eliminating the need to cue Dolby Digital films or trailers.
Exception - CP45s built before mid-1997: The DA20 will not automatically switch the
CP45 into Format 10 if Format 01 (mono) has been selected.
If all of the above conditions exist, then the DA20 will automatically switch the CP45/
CP65/CP500 to Format 10, eliminating the need to cue Dolby Digital films or trailers. If a
film format button is pressed on the CP45/CP65/CP500 after the DA20 has automatically
switched to Format 10, the DA20 will switch the CP45/CP65/CP500 back to Format 10
after the button is released to keep the CP45/CP65/CP500 in Format 10 as long as Dolby
Digital audio is available. If digital audio is no longer available, the DA20 will cause a
reversion and switch the CP45/CP65/CP500 to Format 05. During a reversion, any
format can be selected on the CP45/CP65/CP500 and the DA20 will not assert any
formats. However, if the CP45/CP65/CP500 is in a film format and digital audio again
becomes available, the DA20 will switch the CP45/CP65/CP500 back to Format 10.
There are two methods by which to disable the automatic selection of Format 10 on the
CP45/CP65 and one method on the CP500. These are described below:
CP45/CP65/CP500: The user can rotate the CP Type switch to position 6, CP45/CP65/
CP500 Auto Digital Disabled mode. 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: In emergency situations 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.
Any format button on the cinema processor can be pressed 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 for 4 seconds, 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:
In order for the CP200 Auto Digital mode to operate, the DA20 must be connected to the
CP200 using a Cat493 Auto Digital Interface board and cable assembly. 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 from the above mentioned processors.
When power is first applied to the DA20 with the CP Type switch (see figure 1.3) set to
position 3 (CP200 Auto Digital mode), the DA20 will sequentially select formats A
through D on the CP200, looking for Format 10. The DA20 will scan the four format
selectors up to 10 times. If Format 10 is found on one of the format selectors, the DA20