User Manual

DTC COMMUNICATIONS, INC.
11
ANTENNAS
A standard SMA connector is used as the antenna connector on both the
VBS/VBL-250.
TIP: You may use the VBS/VBL series transmitters with other manufacturers
antennas. Verify that they are suited for the band you are operating in.
WARNING: Refer to Appendix A of this manual for information on the proper
use of antennas.
CHASSIS MOUNTED POWER ON/OFF SWITCH
A slide switch is provided for local control of power ON and OFF. Green dot is
ON, Red dot is OFF.
NOTE: REMOTE ON overrides the chassis mounted OFF switch. (i.e. When
the chassis mounted power switch is set to OFF, REMOTE ON can be used
to turn the transmitter ON.)
CHANNEL SELECT SWITCH
Select a transmission channel by using the rotary switch located on the front
surface of the transmitter. Use a screwdriver to rotate the switch to the desired
channel number.
MULTI I/O CONNECTOR
The multi I/O (6-pin Multi I/O) connector is mainly used as the video and external
power input connector. It also provides access to many transmitter functions, such
as:
• Programming the device
• Video in
• Power in
• Remote on
• Camera power
CONNECTIONS
On/OFF
Switch
Antenna Connector
Multi I/O Connector
NOTE: When using the external
power: camera power = external
power -0.5 Vdc.
When using internal batteries: camera
power = 5 Vdc.
Pin 3: Camera
Power Output
Pin 1: Ground
Pin 2: Ext power
input 9-16VDC
Pin 6: Video in
Pin 5: RS-232 in
Pin 4: Remote on,
switched to ground
multiplexed RS-232 out
Channel
Select