[Elecraft] KPA500+KAT500 interfacing

[Wes]

Thanks Andy.

I'm starting to get my head around this.  "Tis a pity that Elecraft didn't allow 
for the KPA500 to control the KAT500 via the band data bus and have an 
integrated Amp/Tuner combo that didn't require a proprietary interface.

The tuning solutions are in the tuner memory so telling it, or letting it 
measure, the frequency recalls them.

Wes


On 11/18/2020 3:02 AM, Andy Durbin wrote:
> "I simply want to know:
> 1) does the KAT500 also switch with BCD data
> and
> 2) if so, can those data come from a KPA500 that is being controlled with serial data.  (When I say Aux cable, I'm referring to the 15-pin cable that includes BCD (band) data."
>
>
> 1 - The KAT500 schematic shows it receives  BCD band data.   I assume that could be used to control the selected antenna but I don't see how it would be useful for selecting a tuning solution.
>
> 2 - The KPA500 schematic shows that BCD band data is receive only so it does not appear to be capable of sending band data to the KAT500.
>
> My "interesting project" computes and outputs Elecraft format BCD band data but I found no use for it and I disconnected it after initial testing.   I control my KPA500 with the serial data band command "^BN" and I control my KAT500 with the serial data frequency command "f".  My KAT500 and KPA500 always follow my TX frequency.  I placed higher priority on avoiding KAT and KPA faults than on optimizing receive performance when split.
>
> Current KAT500 firmware can only follow VFO A (FA) if listening to a Kenwood rig that is being polled by a KPA500.  The Kenwood TX VFO may be VFO A or VFO B.
>
> 73,
> Andy, k3wyc
>
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