Controlling The 7735Avc-Lb From The Communications Port - evertz 7700 Manual

7700 MultiFrame Manual
7735AVC-LB Video Composite Encoder and Audio DAC with SoftSwitch
9.

CONTROLLING THE 7735AVC-LB FROM THE COMMUNICATIONS PORT

Remote control and status monitoring of some of the AVC features are available through the RS-232 port
on the AUDIO AND AUX I/O connector. The COM port signals are standard RS-232 with no hardware
flow control. The directions of the signals are indicated in Table 2-2. Control and data logging must be
configured with custom software that communicates with the 7735AVC-LB card using the AVC
Control/Status Protocol.
The following items can be controlled using the control port. See the appropriate section in this manual for
specific details:
•
Output video level control (section 7.5.1.4)
•
NTSC setup pedestal on/off control (section 7.5.1.1)
•
Line 21 setup pedestal on/off control (section 7.5.1.2)
•
Audio group source selection (section 7.4.1)
•
Analog peak audio output level control (section 7.4.4 and 7.4.5)
In addition, module fault and status may be extracted from the card. The on-screen menus, fault and
status can either be pulled out of the card at any time, automatically sent out of the card based on a timer,
or sent out only when a user defined fault occurs. See section 7.8.2 for complete details of how to set up
data logging.
Card presets (complete card configurations) can also be downloaded from and uploaded to the card
through this communication port using the ConfigSet software supplied with the 7735AVC-LB (please refer
to section 8).
For more information on the protocol used for these services please contact Evertz Microsystems Ltd. for
the following documents:
1. Communications Protocol Specification Revision 1.16 or greater for the description of the low level
(application non-specific) description of the communications dialog.
2. AVC Control/Status Protocol Revision 1.0 or greater for the description of how the previously
mentioned AVC controls are transported over the above protocol.
3. SID Setup Transfer Protocol Revision 1.0 or greater for the description of how the card presets are
transferred to/from the hardware.
7735AVC-LB - 38
Revision 1.6