[Elecraft] K2 Band Data

[Jim Brown]

On 9/1/2023 7:21 PM, Michael Carter wrote:
> One clarification on the AUXBUS signal: the
> 'auxbus' is Elecraft's proprietary 1-wire
> signaling scheme by which the main MCU
> on the K2 Control board talks to all of the
> other controller ICs on the various option
> modules and the I/O controller (relay driver,
> among other functions) on the K2 RF board.
> The 'auxbus' signal is made available via the
> KIO2 interface, if installed, for use with
> external Elecraft modules (e.g. the KAT100
> ATU, KPA100 PA, and the transverter modules).

One caution -- I was told by someone at Elecraft years ago that not all 
later products implement it. I think I remember KAT500 and/or KPA500. 
I'm using Auxbus from K3s KRC2s to generate band data to switch bandpass 
filters. Very nice - a single coax from K3 to KRC2. I don't remember 
what format the filters wanted. That was W6FB's project, I think.

73, Jim K9YC