Dolby CP750 Digital Cinema Processor Manual - Projectionniste.net

Introduction
1.3.7 Automation Connector
This connector is used to select an audio input, to read back the currently‐selected input,
and to remotely assert the mute command. The pinout is listed in Section 7.2.5.
The automation subsystem is referenced to pin 12, Automation Return. This is the ground
for these functions, and is connected to the ground of the CP750 only through a 1 k
resistor. An isolated power supply is provided so that connection to automation systems
can be made without introducing hum due to ground loops.
Caution: The isolated power supply can only function properly if the Automation Return
pin is within ± 5 Volts DC (or peak AC) of the CP750 chassis ground.
The automation control system is designed to accept contact closure inputs. A closed
contact asserts a command. The low side of the contact closing switch or relay should be
connected to Automation Return.
Warning: UNDER NO CIRCUMSTANCES should power from an external source be
supplied to any pin in this connector! Connecting external power is likely to
damage the CP750.
1.3.8 1xAES IN Connectors
These BNC connectors are linked to the Digital 2 and Digital 3 buttons. They accommodate
PCM audio at 96, 48, and 44.1, and 32 kHz (16, 20, and 24 bits) and Dolby Digital at all data
rates and sample rates. A BNC male to RCA female adapter can interface with most
consumer gear. These connectors have floating grounds.
1.3.9 Opt In Connector
This optical connector is linked to the Digital 4 button. It accommodates PCM audio at 96,
48, 44.1, and 32 kHz (16, 20, and 24 bits) and Dolby Digital at all data rates and sample rates.
1.3.10 NonSync Input Connector
2 RCA jacks labeled L and R that accept 3 V RMS
maximum input.
1.3.11 Aux Out Connectors
These analog output represents channel pair 7/8 of the 4xAES input.
For the top output labeled 7, the source is Channel 7 of the 4xAES input. No equalization
or level control is applied.
For the lower output labeled 8, the source is Channel #8 of the 4xAES input. No
equalization or level control is applied.
8 Dolby ® CP750 Digital Cinema Processor Manual