[Elecraft] How to get SWR

[Holger Schurig]

Hi ho,

I want to programmatically get the SWR, or at least an approximation of the
SWR via the serial cable.

I found an old application kx3swr.py (http://robert.butera.org/?p=380), but
somehow this one returned always 0.0 as SWR back, which I didn't really
believe. Basically the program does this:

select ATU menu: MN023;
turn ATU to bypass: MP001;
turn menu off: SWT09;
set frequency: FA ... ;
wait a bit
turn TUNE button: SWH16;
wait a bit
get VFO data: DS;
try to decipher it
release TUNE button: SWT16;

However, my KX3 with firmware 2.38 always returns DS@@@@@>>@; as response.
Even when I do the steps manually. Did this change with some recent
firmware update, or did I miss something important?  Only when outside of
TUNE I get some value, e.g. DS14³60°00.


Also, dear Elecraft, in the K3&KX3 Programmers manual you wrote in the BG
command description "CWT, SWR, and CMP readings not yet available". How
long is "not yet" going to take?  :-)

Or, dear Elecraft, maybe you implement the RM command like the Kenwood
TS850 or TS870 ...  (I have found them used in the hamlib source).


73, Holger