ELECRAFT K4 - Page 52

51
ANTENNA SELECTION
TX Antenna
To select a transmit antenna, tap [ANT]. An orange text icon near the
upper middle of the LCD shows this selection. Both receivers default
to this antenna as well, as indicated by their separate antenna icons
under the main and sub S-meters.
If there's no KAT4 ATU installed, only ANT 1 will be available for HF-6
meter use. With a KAT4 installed, ANT 1, 2, and 3 are available. If you
have only two antennas rather than three, you can constrain the ANT
switch to alternate between them. To make these selections, tap
<TX>, followed by <ANT CFG>.
When using external transverters, IF drive is provided at the XVTR OUT
jack. Internal transverters use ANT4.
Also see ATU TUNE.
RX Antennas
By default, the transmit antenna is also used for the main and sub
receivers. The receivers can be switched to receive-only antennas by
tapping [RX ANT] (for main) or holding [SUB ANT] (for sub). This brings
up the RX antenna button group, which includes various selections
(per-receiver):
• ANT1, ANT2, and ANT3 (if an ATU is installed)
• RX ANT 1 and XVTR IN/RX ANT 2 (dedicated receive antennas)
• "=TX", which causes a receiver to always use the transmit antenna
• "=OPP TX ANT", which causes a receiver to use the opposite of the
transmit antenna if the transmit antenna has been constrained to a
subset. (To set up the latter, tap <TX>, then <ANT CFG>.) This mode is