Dolby Laboratories CP750, Руководство пользователя

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8 Dolby
®
CP750 Digital Cinema Processor Manual
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 8.2.5 .
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.
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.
1.3.8 1x AES 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
Two 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 4
×
AES input.
For the top output (labeled
7
), the source is channel 7 of the 4
×
AES input. No equalization
or level control is applied.
For the lower output (labeled
8
), the source is channel 8 of the 4
×
AES input. No
equalization or level control is applied.
These analog output connectors represent either channel pair 7/8 of the 4
×
AES input or the
input present on the
Digital 2
input, depending on the selected output configuration and
the
HI/VI-N Options
setting on the
General Settings
tab.
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.
Warning: Under no cirumstances should power from an external source be supplied to any
pin in this connector. Connecting external power is likely to damage the CP750.