2. Run two wires to the potentiometer (see the drawing below) from TB2 "remote fader A and B" on the back of the CP-65.
3. Connect a wire from the automation system (which will deliver a momentary pulse) to TB1 "R/L" on the back of the CP-65. NOTE: the drawing below lists this connection as "C/O", but is labeled properly on the back side of the CP-65. For reference purposes, the "R/L" connector is between "S7" and "MUTE" on TB1.
4. Turn off all power amplifiers, including any self-powered subwoofers. Disconnect power to the CP65. Remove the cat #443 card. On this card is a jumper to enable the remote fader option. Position the jumper to the "ON" position. (Dolby ships these cards from the factory in the "OFF" position.) Reinstall this card and then power everything back up.
5. Insert a cat85 pink noise generator and read the center channel output at normal feature fader level. It should be 85db or near it.
6. Press the "select local/remote" button on the front side of the CP-65, just below the master fader. Note the red led above the fader will extinguish, signifying the "remote" or "trailer" fader is active. With pink noise on the center channel still running, set the newly installed potentiometer to 75db (or 10db lower than your normal feature fader level). NOTE: this adjustment will approximate the final setting. A minor adjustment by ear may be desired.
The installation is now complete.
Use the front panel fader to adjust the desired feature level and leave
the rear panel fader alone to play trailers.
2. Your automation MUST be configured in a way that will allow a momentary pulse to switch the processor INTO remote status at the douser open and OUT of remote status on a cue. It is a simple "toggle" and there is no logic built into the CP-65 to differentiate between local and remote status. Ideally, a separate cue alltogether is desired...one on the leader and one at the feature or just before the sound demonstration logo. However that is not always possible. A common automation design will pulse the Dolby processor into "mono" at the douser open and then into "stereo/SR" at the lights down/feature cue. If you have such a system, connect BOTH "mono" and "stereo" pulse wires together at the "stereo/SR" input. Then jump THAT connection to the "L/R" connector. This will pulse the unit into "remote/trailer fader" and "stereo/SR" at the douser open. Then at the feature cue, the unit will pulse into "local/feature fader." It's that simple and as an added benefit, will play the trailers in stereo/SR.
3. Should the automation miss a cue, a simple push of the "select local/remote" button on the front side of the CP-65 will restore the status. (Of course, powering down at night will also reset the local/remote status back correctly.) Remember, the ONLY time the led above the master fader should be extinguished is during the trailers.
4. The front panel fader will have NO effect on the volume in the theater during trailers.
5. This wiring trick will NOT work with SDDS units in their typical
configuration. See below for a trick on SDDS.
2. Connect your designated SDDS momentary cue from your automation to pin #13. If you do not have the capability of a dedicated cue, connect the "mono" lead as mentioned above to "stereo/SR" and the original "stereo/SR" cue to pin #13 on the SDDS automation I/O connector.
The installation is now complete.
Use the SDDS fader to adjust the desired feature level and the Dolby
fader to play trailers.
2. What will happen is, the SDDS decoder will remain in bypass during the trailers until the "feature" or dedicated "SDDS" cue pulses the decoder OUT of bypass mode, allowing the feature to run at the setting on the decoder itself. Whatever the analog processor is set to will be the volume of the trailers.