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Antenna Names
Both the ATU antennas and receive antenna jacks can be given names
by the user, e.g. "Yagi," "Dipole," etc. These names will then appear as
the TX and RX antenna icons in lieu of the default names (ANT1, 2, 3
and RX ANT 1, 2).
To assign a name to an antenna, tap the [RX ANT] switch, then hold one of
the antenna select buttons to bring up the Alphanumeric Keyboard.
Using RX ANT OUT
RX ANT OUT provides a way to insert an external band-pass filter, preamp,
attenuator, or antenna splitter into the receive path of the main and sub
receivers. Another possible use is to feed a signal to an adjunct
receiver/panadapter. The signal that appears on RX ANT OUT is obtained
from the transmit antenna path, meaning it passes through the ATU and TX
low-pass filters. Since it also passes through the T/R switch, it is inherently
protected from the K4's own transmit signal.
In order for RX ANT OUT to be active, both receivers must be
configured to use receive-only antennas (RX ANT IN 1 or XVTR IN/RX
ANT IN 2). This disconnects the T/R switch's receive path from both
receivers so that it may be routed to RX ANT OUT instead.
Example: If you wanted to insert a narrowband filter for 20 meters into
the path of the main and sub receivers, you could connect its input to
RX ANT OUT and its output to RX ANT 1 IN. To enable the RX ANT OUT
signal, set up the main and sub receivers to use RX ANT 1.
Additional examples TBD.
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