This issue has been present with SteppIR controllers for
all of their antennas and Kenwood transceivers since the
very beginning and is not likely to *ever* be fixed due
to limitations in the Kenwood IF (autoinformation)
"broadcast". 1) IF contains the current operating frequency
and changes between transmit/receive. 2) IF does not contain
a "PTT" flag to indicate when the transceiver switches to
transmit. 3) The same considerations apply to other rig
makers who also output "current frequency" with no PTT status
in their autoinformation "broadcast".
If the transceiver is "Split" across the 10/25/50/100 kHz
(depending on band) boundary the SteppIR controller (all
varieties) will command a "retune" when the frequency changes.
It is a decidedly poor decision by SteppIR not to include a
"PTT In" connection (parallel to amplifier PTT) to inhibit
tuning while in transmit. Even though newer controllers have
added a PTT loop to prevent amplifier operation while the motors
are moving, AFAIK, that is simply a pass through relay contact
and is not monitored for transmit state.
As suggested in another reply, the one solution is to use software
like PST Rotator, DXLab Suite Commander, or the emulated CI-V
output of some microHAM interfaces to emit only the transmit
frequency.
73,
... Joe, W4TV
On 2025-03-15 11:11 AM, Andy Durbin wrote:
"You are correct. I have made that change in draft 13."
Turns out that I had corrected that error years ago but I had not linked the
current version of the file.
Here is Rev a - https://tinyurl.com/yzdp7m3m
Andy, k3wyc
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