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BARRETT PRC-4090 TACTICAL HF SDR TRANSCEIVER - INSTALLATION
To mount two whip
sections together, the
unattached whip sec-
tion should be hand
tightened, then a suita-
ble tool (i.e. a spanner)
can be used to tighten
the section a further
10 to 20 degrees clock-
wise while holding the
already screwed on whip
section with a free hand.
Testing the Barrett 2019 Automatic Tuning Mobile HF Antenna
To test the Barrett 2019 antenna, first select the lowest transmit frequency in
the transceiver and tap
Tune
. The display should show the word “Tuning” for a
few seconds, followed briefly by “Tune Passed” and an indication of the meas
-
ured VSWR (Voltage Standing Wave Ratio) value. Check this reading against the
VSWR meter.
Repeat the above test on the highest frequency in the transceiver and on a
selection of frequencies at approximately 2 MHz intervals. If the tune passes
every time, the Barrett 2019 antenna is working correctly. The Barrett 2019
antenna tunes to maximise whip current, not minimise VSWR, but the dis-
played VSWR value should generally be between 1.0:1 and 2.0:1. However, if
the display shows “Autotune Fail” accompanied by low pitched beeps, the Bar-
rett 2019 antenna has failed to tune. Confirm the “Antenna Type” is selected
to “2019 Mobile Ant” in the transceiver Menu Settings < IO < Antenna Type
setting (page 24). For possible causes check that all cables are properly con-
nected, the earth cable from the base of the Barrett 2019 antenna has a good
connection to the vehicle body (not chassis or battery), the whip fitted is not
faulty or incorrect and move the vehicle if the Barrett 2019 antenna is close to
any metal fences, buildings etc. If the problem cannot be resolved, contact your
dealer or Barrett Service Department for advice.