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9.
Record the wattmeter reading for forward power into the antenna, or take remedial action and
measure the output again.
•
If the wattmeter reading is within the range,
record the value in the appropriate space on the
data collection form near the end of this manual.
•
If the wattmeter reading is outside the range,
verify the radio’s power supply voltage (i.e.,
battery voltage) is within the specified range, recheck all connections, and measure the forward
power again. If this fails to produce a reading within the range, check all cabling and connections,
and repeat the testing procedure to this point. In the event the wattmeter reading still falls outside
the range, replace the antenna, make sure all connections are seated firmly, and repeat the testing
procedure.
10.
Position the wattmeter’s slug to measure reverse (reflected) RF power from the antenna. The arrow
on the face of the slug must point away from the antenna and toward the radio to measure reverse
power.
11.
Measure the reverse (reflected) RF power from the antenna by typing these commands:
^8
— puts the radio into 100% duty cycle test mode
^W
— causes the radio to transmit
^X
— causes the radio to terminate transmissions
atz9
— causes the radio to reboot
NOTE
Transmit only for as long as needed to take the measurement, then immediately disable the
transmission.
12.
Compare the wattmeter reading with the RF power output range of
2 watts or less.
13.
Record the wattmeter reading for reverse RF power from the antenna, or take remedial action and
measure the output again.
•
If the wattmeter reading is within the range,
record the value in the appropriate space on the
data collection form near the end of this manual.
•
If the wattmeter reading is outside the range,
make sure the antenna is consistent with the
specified frequency range of the radio. Recheck all antenna connections, and measure the reverse
power again. If this fails to produce a reading within the range, replace the antenna and repeat the
entire antenna test procedure. Any value exceeding the maximum allowable reflected power
value will result in a diminished RF output signal.
14.
Disconnect the coaxial cable jumper and wattmeter.
15.
Permanently connect the mobile antenna cable to the radio’s antenna cable by mating the two TNC
connectors together. Use two pairs of slip-jaw pliers to gently tighten this connection. Do not over
tighten and do not twist either cable.
NOTE
To prevent RF leakage and ensure peak performance, make sure the RF connectors are
tight, but do not over tighten so connector damage will not occur.