BARRETT 950 HF TRANSCEIVER
PAGE 118
910 Antenna Testing
To test the antenna, first select the lowest transmit frequency in the transceiver and press the
TUNE* key. On a 930 or 950 transceiver the display should show the words “Automatic Tuning”
for a few seconds, followed by “Autotune Passed”. (On a 530 or 550 transceiver the lower line
of the display will indicate “SWR” and the transceiver will “beep” while the tuning is in progress,
then stop beeping once the tune is successful). Repeat the above test on the highest frequency
in the transceiver, and on a selection of frequencies in between at approximately 2 MHz
intervals. If the tune passes at all times, the 910 is working correctly.
However, if the display shows “Autotune fail” accompanied by a series of low pitched beeps at
any point, the 910 has failed tune. Check all cables are correctly connected, check the earth
cable from the base of the 910 has a good connection to the vehicle body (not chassis or
battery), check the whip fitted is not faulty or incorrect, and move the vehicle if the 910 is close
to any metal fences, buildings etc. The 910 tunes on whip current, not SWR. If the transceiver
indicates tune has passed, the system is working correctly.
*On the 550/930/950 Transceiver, press the TUNE button.
On the 530 Transceiver, press and hold the desired channel key for more than 2 seconds.
Preferred Mounting Positions
ABSOLUTE MINIMUM CLEARANCE
TOP VIEW
160mm
BULL BAR
Important:
Please note that the mounting
of a 910 Antenna on the front
of a vehicle may be considered
illegal in some areas/countries.
Please check with your local
transport/vehicle authority prior
to installation on the front of
your vehicle.
