Videoswitch VT - Manual (Page 19)

VT Series 2 User Manual Page 19
Videoswitch
VT601c.doc
8.7 Preset on Alarm (not VT-11)
When an alarm is detected by the transmitter, preset 1 may automatically be called up. Note that if alarm
presets are being used, this switch should be off, as the alarm preset option will perform preset selection at
the receiver.
S3-1 Preset on alarm
OFF Presets unaffected on alarm
ON Preset 1 (only) is selected on alarm
8.8 Master/Slave Operation
The telemetry transmitter may be set to operate either continuously (single controller mode) or only when
a switch is pressed, and for two seconds afterwards (multiple controller mode). When more than one
transmitter is connected, it is essential that the multiple controller mode is selected for each transmitter.
S3-2 Transmit Mode
OFF Single Controller Mode
ON Multiple Controller Mode
(master/slave)
For Master/Slave operation, the video signals from each camera should be looped through from the
Master transmitter to the camera inputs of the Slave transmitter using “T” adapters. Further transmitters
may be added in a similar way. All transmitter must have the camera termination turned off except for the
last in the line, which has termination turned on.
If master slave operation is required where the telemetry control is via twisted pairs, the transmitters also
have to be linked by twisted pairs. Connect the twisted pair slave input of the Master, to the twisted pair
output of the slave transmitter. Other slaves may be added in a similar way. Note that either RS232 or
20mA must be used throughout.
8.9 Twisted Pair Telemetry Baud Rate
The Series 2 transmitters may be used to control receivers via twisted pair instead of coax. If twisted pair
mode is used, two data rates are available. The data rate must be compatible with the type of receiver
used.
S3-3 Twisted Pair Telemetry Baud Rate
OFF 7800 Baud (Series 1 compatibility)
ON 9600 Baud