INDEX Page. 17 of 89
4.3 QSK (Full Break-In) Operation
The Expert 1.5K-FA also allows QSK (FULL BREAK-IN) operation. Thanks to the
correct control used on the RX / TX switching relays, any possibility of "hot switching"
is avoided.
This feature is compatible with all modern transceivers, in fact the minimum delay
required before a transmission is usually less than 6 msec. (check the manual of the
transceiver).
In the case (and it is very remote) of minor delay needed, you can use the link TX - INH
(see "CAT" paragraph).
Special very reliable, “noiseless”, with high mechanical performance, gold plated relays
are used so that the “vacuum relays” option is no longer required.
4.4 Tunable Antenna Control
The use of tunable antennas (SteppIR, Ultrabeam) is becoming popular.
These antennas vary the physical dimensions of the elements according to the
operating frequency in order to ensure a perfect resonance.
The Expert 1.5K-FA, through the dedicated "PORT" socket linked to the antenna
controller, allows automatic control by tracking the tuning knob changes.
This dedicated link makes the following advantages possible:
- Simplification of wiring, such as the complication of adding additional wiring to the
CAT connector is no longer necessary.
- Compatibility with all types of CAT: The Expert 1.5K-FA converts the CAT protocol,
so two different transceivers (CATs) can be used simultaneously with the same
controller without any modification of the wiring.
- Thanks to the frequency counter inside the linear, the antenna can be controlled also
without the use of CAT.
All of the automatic features of the linear are ensured even in the most complex
configurations.
Antennas of all kinds can be connected to the "ANT" PORTS and the Expert 1.5K-FA
will choose the antennas according to the set-up and will manage them according to
their characteristics.
The CAT is recommended, however, if the transceiver does not have the CAT or if it
only has the "Band Data", the Expert 1.5K-FA will continue to drive the antenna with the
frequency measured by the counter (data collected after the first transmission) .
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