Chapter 4: remote control, 1 remote connector, 1 logic output – Dan Dugan Sound Design D-3 User Manual
Page 41: Remote connector, Logic output
Dugan Model D-3 User Guide
41
Chapter 4: Remote Control
There are four methods for controlling the Model D-3 Processor:
•
the D-3 Control Panel (see Chapter 3: Operation);
•
by contact closures at the rear panel
REMOTE
•
by ASCII commands to the RS-232
HOST
•
by interfacing a virtual control panel via the RS-422
CTRL
connector. A virtual control
panel can include both controls and displays (contact the factory for assistance).
In any case, the Processor continues to perform automatic mixing if the Control Panel
is disconnected.
4.1
Remote Connector
The Processor’s back panel
REMOTE
connector provides:
•
Mute inputs (contact closures pulling to ground) for the input channels.
•
Contacts for master functions Override and Mute. Override and Mute are momentary
the same as on the Control Panel.
•
Logic outputs for the channels. Contacts are pulled to ground when channel gain is
above -3 dB. See the next section for details.
4.1.1
Logic Output
The model D-3 has one logic output per channel that is true (low) when the gain of an
individual channel is high (above -3 dB). This may be used to switch off speakers near the
mic, or to switch to a different camera. The logic output normally has about 0.5 s delay
when turning from false to true. For camera switching, the delay prevents inadvertent
switching from momentary noises like paper flaps. Since instantaneous response is re-
quired for speaker switching, contact the factory to learn how to adjust the software for
this mode. The logic output is an open collector transistor switch, grounded when active.
There is an internal 51 k
Ω pull-up to 5 V.