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BARRETT PRC-4090 TACTICAL HF SDR TRANSCEIVER - INSTALLATION
Electrical Checkout
After mechanical installation is complete, select the highest frequency to be
used on the transceiver. A directional watt-meter may be inserted in the coaxial
transmission line between the transceiver and the tuner, although the inter-
nal metering of the Barrett PRC-4090 Transceiver is accurate. The tune mode
on the transceiver is then energised. Upon application of RF energy, the tuner
should start to tune, indicated by the ‘clattering’ of the tuner relays. After a few
seconds the relay noise will cease, the transceiver should indicate “Tune OK”
and the watt-meter and PRC-4090 handset should show a low value reflected
power consistent with a VSWR of better than 2:1. Select the lowest desired
frequency on the transceiver and repeat the above procedure. The result should
be the same, except that the tune cycle may take somewhat longer. If the above
procedure does not give the results indicated, check that the antenna length
and connections are correct and re-check all ground (earth) connections.
Note: When received, the Barrett 4011 automatic antenna tuner memory system
will not have any pre-stored tuning information appropriate to your installation. To
allow the 4011 to ‘learn’ its tuning information, simply proceed from one channel to
the next allowing the normal tune cycle to take place. Each successful tune is ‘mem
-
orised’ so that when that channel is re-selected the tuner will almost instantaneously
retune to that frequency.
Содержание 4090 HF SDR
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