IF reports the VFO "in use". In split that is the RECEIVE VFO while receiving
and the TRANSMIT VFO while transmitting — the backend took it as the receive VFO
in both cases. Everything therefore read correctly until the PTT closed and then
reversed, which is exactly how it was reported from a TS-590 on USB.
The IF frame has carried the transmit bit all along; parseKenwoodIF already
decoded it into f.TX. It was simply never consulted here.
This is not only a display fault. FreqHz is what a QSO is LOGGED on, so a
contact worked in split went into the log on the DX's frequency instead of the
operator's — wrong in the log, wrong in every ADIF exported from it, and
invisible until someone checked a QSO by hand.
The emulated rig in the test package can now be keyed, so the case is pinned
from both sides: verified failing without the fix (tx and rx exchanged) and
passing with it.
A Kenwood answers "?;" while it is busy, and the TS-590SG does it for a moment
after RX; — which is exactly when the poll resumes. One rejected IF; then tore
down the whole CAT link.
The code already knew this. Its own comment says a "?;" to IF; is "a transient
busy, NOT unsupported" and that latching it off "would read as lost the rig".
That reasoning was applied to the unsupported-command map and stopped there: the
call still returned an error, the poll loop still turned it into connected=false,
and the link still dropped.
What it cost was not cosmetic. WSJT-X keys through shared CAT, so it lost the
rig mid-sequence; Hamlib then sent "F 9223372036854775808.000000" - an
uninitialised 2^63 - which OpsLog refused and logged. The operator sees a
frightening frequency error whose actual cause is three lines earlier.
A "?;" is now sentinel-wrapped so the poll can tell "the rig declined" from "the
serial link is gone", and three consecutive ones are ridden out on the last
known state before the link is called dead. Under a second of tolerance: enough
for the rig to finish, far too short to hide an unplugged cable. A serial fault
is untouched and still drops immediately.
Tested against the emulated rig already in this package, with a hook that
answers "?;" on demand: the link survives inside the grace and still reports the
last good frequency, the count resets on recovery so a later busy spell gets the
full allowance, and a rig refusing forever is still reported as broken.
d4bfd30 fixed a Xiegu G90 behind a DE-19 that keyed on connect, and I
applied the same line-lowering to Kenwood and Yaesu with no evidence that
either needed it. It silenced them: many USB-serial interfaces will not
transmit with RTS low — hardware flow control, or an output stage the
line enables. A TS-990 on COM3 opened cleanly and answered nothing, which
reached us as "CAT stopped working after the update".
Xiegu keeps the behaviour: that is where the fault was reported, and that
backend now has an explicit setting for which line keys the rig. The CI-V
backend keeps its own, which predates all of this.
Kenwood also distinguishes a silent port from one sending data that never
answers, and quotes what arrived — "the rig is not answering" sent an
operator checking the power switch on a radio whose frames were visibly
on the wire.
Reported from a Flex in Kenwood CAT mode: frequency read perfectly, split never
appeared. Not every rig speaking this dialect fills IF's split bit.
Rather than guess which column that firmware populates, ask the question that
DEFINES split — is the transmit VFO a different VFO from the receive one — which
is exactly what FR and FT answer, and the same rule the Yaesu backend settled on
after several wrong turns. FR is also trusted over IF for which VFO is in use:
they are asked in the same breath, and a rig vague about the split bit may be
just as vague about the VFO field.
Cost is bounded: a rig that rejects FR/FT answers "?;" once and is never asked
again, so this is two short commands per poll only where it works. Both paths
are tested against the emulator — split found through FR/FT with IF silent, and
IF-reported split still working on a rig that refuses FR/FT without re-asking.
Also extends the CAT wire trace to the Kenwood backend, ASCII quoted so an empty
reply is visible as such: "" and ";" look identical unquoted, and telling them
apart is the whole question when a rig half-supports a command. If this fix is
not the whole story on real hardware, the trace is what will say so.
Nobody here owns a Kenwood, and a backend that has never completed a single
exchange is a guess however carefully it was written.
But this repository already contains the other half of the conversation:
internal/catemu ANSWERS this dialect, pretending to be a TS-2000 so an ACOM
amplifier follows OpsLog. The test's responder replies exactly as catemu does —
same FA/FB widths, same 38-character IF layout, same ID019 — so the two halves
are checked against each other instead of against my reading of a manual.
Connect adds a dialPort seam for this; nothing else changed in the backend.
Covered: model identification, simplex on A, everything following the VFO in
use when on B, tuning writing to that VFO rather than blindly to FA, split with
TX and RX the right way round (ADIF FREQ is the TRANSMIT frequency — swapping
them writes the wrong frequency into every logged QSO), the mode digit, and a
silent port reported as not answering rather than as a connected radio. The last
three are each a fault that actually reached a user through the Yaesu backend.
What this does NOT prove: that a real TS-590 answers on the same timings, or
fills every IF field the way its documentation says. That still needs a radio.
rouggy