User's Manual

First InterComm™ system VCA100 user manual A29798 September 2008 5
Operating the First InterComm system
Vehicle location
Start-up
1. Apply power to the VCA100 with the
cab-mounted switch.
2. Allow approximately one minute for
the unit to initialize and connect to
any other VCA100s in the area.
Wireless signals weaken as they
travel away from the transmitter. The
First InterComm system operates up
to a quarter mile between VCA100s,
assuming a clear, unobstructed LOS.
Buildings, hills, vegetation and other
obstructions will reduce range as
shown in Figure 4. Interference from
metallic objects such as large trash
3. Switch radio equipment to the tactical
channel on portable radio designated
for First InterComm system
interoperability.
4. Communicate using the applicable SOP.
receptacles and vehicles can degrade
performance. Whenever possible,
position VCA100-equipped vehicles to
minimize such factors.
RECOMMENDATION
Do not turn on the VCA100 unit until parked at the scene.