[Elecraft] AUXBUS Troubleshooting

[Don Wilhelm]

Karin,

The AUXBUS is Elecraft proprietary and is used to communicate between 
the MCU and all other firmware devices in the K2 system.  So your 
"Strange bit streams" are not likely to be related to WSPR controls.

If WSPR gets the proper data on the RS-232 signals, the KPA100 or KIO2 
will pass those signals to the MCU (in TTL compatible voltages) using 
pins 24 and 25 of Control Board U6 (TXD and RXD) - in turn the MCU will 
either operate the proper K2 circuits directly or communicate with 
whichever option firmware IC is needed to complete the request.

What faulty operation are you experiencing?  You can email me privately 
or send your reply to the reflector.

I have had experience with the K2 since 1998 and regularly service the 
K2 (about 3 a week this year) and have never had to debug anything on 
the AUXBUS except to verify that it is producing pulses.  Even though I 
do some of that work for Elecraft, I do not have access to the AUXBUS 
protocol, nor have I needed it.

In other words, the AUXBUS has no relationship with the K2 serial 
communications, so I believe you may be looking in the wrong area.

73,
Don W3FPR


On 12/22/2017 3:44 PM, Karin Johnson wrote:
> Hello Group:
> I am trying to debug an issue I am having with CAT control of an Elecraft K2
> using the WSPR software.
> WSPR is setup to use CAT control for turning on the Xmtr.  That part works
> but I'm seeing some very
> Strange bit streams on the AUXBUS during the WSPR control sequence.
> I would rather not take up the list with back and forth debugging this
> issue.  Anyone on the list have
> Some knowledge of the AUXBUS protocol that I could communicate with to run
> down this issue.