The transmit meters were read on k.tx, which records only that OpsLog
keyed the radio. An operator using the front-panel PTT, a footswitch or
the mic button therefore had a panel that believed the rig was receiving
— and since the power and SWR bars are read only while transmitting,
they were never read at all. IF carries the radio's own transmit bit;
that is what decides now.
The meter probe logs RAW answers rather than parsed numbers, and asks a
wider set (SM, SMH, BG, SW, PO, TQ). A command answering in a shape we
did not expect is the interesting case, and parsing hid it behind the
same dash as a command the radio refused — which is what still stands
between us and a working SWR reading on a K3.