User's Manual

INSTALLATION
MOBILE STATIONS
ENVOY™ TRANSCEIVER REFERENCE MANUAL 361
Related links:
Radiation safety (non-EU installations) on page 439
Radiation safety (EU installations only) on page 437
Earthing the antenna on page 361
Standing wave ratio on page 366
Earthing the transceiver in a mobile station on page 359
Checking a battery on page 355
Installing the antenna
WARNING: The antenna should be installed by a suitably qualified technician, to
the relevant standards and approvals.
NOTE: Correct installation of the antenna provides efficient operation over the
frequency range of the transceiver. It ensures the antenna provides
maximum output power during transmission and clear reception of
weak signals.
Positioning the antenna
For information on positioning a mobile antenna, see the documentation provided
with the antenna.
Connecting the antenna to the transceiver
A vehicle antenna is a tuned antenna, and therefore, must be connected to the
transceiver using 50  coaxial cable. Type RG58 cable is normally used. The cable
should be as far as possible from other vehicle wiring, especially high-voltage ignition
wiring.
In addition to an RF coaxial cable connection, an automatic tuning whip antenna also
requires a control cable to be connected to the transceiver.
The cables are supplied in standard lengths with the appropriate connectors fitted at
either end.
Earthing the antenna
For information on earthing a mobile antenna, see the documentation provided with
the antenna.
Voltage drop in the
fuse, the control
leads, or the battery
Voltage less than
12 V DC
Check the voltage; it must be greater than 12 V DC on
transmit.
Table 34: Possible faults in the installation (cont.)
Symptom Possible cause Action