[Elecraft] K3(s) SteppIR control

[hdv at kpnplanet.nl]

Hi Lou,

The information sent by the K3(s) is needed, hence the need to connect
(somewhere) to TXD info from the K3(s). (could be at the P3 as well)
A separate CAT/logger program is not needed to invoke K3(s) info to be send

Using the K3(s) Auto Info setting in the Config menu assures that the K3(s)
sends frequency info each time the VFO is changed.
The SDA 100 follows this without a glitch.

Btw : I made a small .exe that invokes the K3(s) to send FA, FB and IF words
on a regular basis.
This could replace any (expensive or memory eating) logging program in case
you want to be absolutely sure all K3 frequency info is being send/decoded.
I use it for tracking purposes of my home made remote controlled PA, which
cannot afford to miss K3 info.
However it could be used with a K3/SDA100 combo as well.

73 Henk
PA0C

-----Oorspronkelijk bericht-----
Van: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net>
Namens Lou W0FK
Verzonden: dinsdag 19 mei 2020 15:21
Aan: elecraft at mailman.qth.net
Onderwerp: Re: [Elecraft] K3(s) SteppIR control

The "official" SteppIR cable schematic also shows that Pin 3 (TXD out on the
K3S's RD232 DE9) is also to be connected. 

https://groups.io/g/steppir/files/Controller%20Cable%20Schematics/S-26_21-60
26-01%20Cable,%209%20pin%20FM%20to%20Male%202%203%205.pdf

Is that connection needed? If it is connected, might it obviate the need for
a separate CAT program?

73, Lou, W0FK


ANDY DURBIN wrote
> "The Y cable is connected to the SDA 100 Data IN, radio port, points 2
> (RXD) and 5 (ground)"
> 
> You also need to link 7 and 9 on the SDA 100 connector.  Pin 
> assignments on the SDA 100 connector are not typical RS-232.
> 
> "PINOUT of 9 pin SUBD DATA IN CONNECTOR 1. Data out RXD 2. RXD to 
> RS232 Radio TXD 3. TXD to Radio RXD 4. TTL Kenwood and active high for 
> Radio CTS 5. Signal Ground 6.
> 7. TTL version of pin 2
> 8. NC
> 9. TTL RXD for Steppir."
> 
> Andy, k3wyc





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