Reported on an FTDX101: with RX and TX moved together to the sub VFO, OpsLog
showed split — and took the MAIN frequency as the transmit one, which would log
the wrong frequency.
ST is a bare flag. It says "split" without saying which VFO transmits, and this
rig raises it whenever the transmit VFO is the sub one, whether or not the
operator is also listening there. FT names the transmit VFO, so where the receive
VFO is known as well (FR), split is derived from the pair: they differ or they do
not. That is a fact about the rig's state rather than a flag whose meaning varies
by model.
The fix is therefore in the probe ORDER, not in the reading: FT is asked first
when FR answered, and ST stays the fallback for rigs that have neither. A test
pins the order and both halves of the trap — that FT gets this case right, and
that ST alone gets it wrong.
rouggy
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