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.
A sixth CAT backend, talking to a TS-590/890/990/2000 over its serial port with
no OmniRig in between — frequency, mode, VFO, split and PTT. Elecraft K3/K4 and
the "Kenwood" setting on other radios speak the same dialect.
The protocol was not researched from scratch: internal/catemu already ANSWERS
these commands, pretending to be a TS-2000 so an ACOM amplifier follows OpsLog.
The IF frame layout here is read from the same format string catemu emits, so
the two halves of the repository agree by construction — and the test caught my
own fixture being one character short, which is exactly the error that layout
invites.
Design notes worth keeping:
- IF; is the poll. One frame carries frequency, TX state, mode, VFO and split,
so simplex operation costs a single round trip; the other VFO is only asked
for when split is actually on.
- FA/FB take ELEVEN digits here where Yaesu uses nine. That is the likeliest
place to copy the Yaesu backend and be wrong by a factor of a hundred, so it
has its own test.
- Every lesson the Yaesu backend learned the hard way is built in from the
start: replies matched to the command that asked, "?;" remembered so a poll
stops paying a timeout for an unsupported command, the serial handle closed
before reopening, and a rig that answers nothing reported as absent rather
than "connected".
Untested on hardware — I have no Kenwood here. The frame parsing is covered by
tests against catemu's own format.
rouggy