Specifications

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th
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© 2003 SGC Inc. 40
wide variety of antennas. The versatile MicroTune™ software
offers these special functions:
1. The coupler is activated whenever forward power is present.
2. In addition to sampling VSWR to determine if the coupler should retune,
it also does a frequency comparison. This causes the coupler to tune
whenever the transmit frequency changes independent of the VSWR
reading.
3. Many tuning paths test different antenna situations. The initial tuning of
a new frequency (or switched antenna) may require up to two seconds.
Any further tuning happens in a matter of milliseconds if jumper JP3
(Tune From Memory) is in its default position.
4. Facilities and algorithms are used which enable accurate tuning at the
low end of the frequency bandeven on shorter antennas than
previously possible.
5. The BITE (Built-In-Test-Equipment) Tune LED includes a safety
feature that alerts the operator to a mismatched condition. When the
proper conditions for tuning are not present, the BITE indicators will
blink. When this happens, the software will “time out” within 20
seconds unless a new frequency is sensed. A new frequency will cause
the coupler to attempt a new match.