Andy; You are using the KPA500 with a non-Elecraft radio. The Auxbus has no traffic - it is _only_ used to communicate to the K3, and is only used when the K3 is set in the KPA500 preferences.
I will communicate further with you shortly with more information to help clear some of your misunderstanding of the KPA500. 73, Jack, W6FB > On Apr 29, 2018, at 6:47 PM, ANDY DURBIN <[email protected]> wrote: > > "fraught with danger"? > > > It's hard for me to imagine how monitoring an "output only" bus with a DSO > could be "fraught with danger". There would be nothing connected to the AUX > bus except the DSO and a pull up resistor. About the only way I can see to > cause any damage is to exceed Io max of the 2N7002K. > > > What risks have I overlooked? I don't want to void the warranty while there > are still unresolved issues with my KPA500. > > > 73, > > Andy k3wyc > > > ________________________________ > From: Don Wilhelm <[email protected]> > Sent: Sunday, April 29, 2018 5:42 PM > To: ANDY DURBIN; [email protected] > Subject: Re: [Elecraft] KPA500/K3 AUX bus specification > > Andy, > > While you seem capable of reverse engineering the AUXBUS, it is fraught > with danger if you get it wrong. > You are "own your own" in this matter. > > 73, > Don W3FPR > > On 4/29/2018 7:37 PM, ANDY DURBIN wrote: >> >> Don, >> >> >> Thanks for the reply. >> >> >> I'm familiar with the PC interface and have, in the hope of tracking >> down a problem, built a logger that uses that bus to interrogate the >> KPA500 at 10 Hz. I was hoping the AUX bus would give a faster >> detection of a spurious band change than my 10 Hz interrogation ^bn;. >> I'll look at the bus with my DSO but I have already been given >> information than suggests its data rate will be too low to be useful. >> >> >> I may have to resort to instrumenting the shift register signals from >> the front panel to the LPF but I was hoping to avoid that. >> >> >> 73, >> >> Andy >> >> >> >> >> >> ------------------------------------------------------------------------ >> *From:* Don Wilhelm <[email protected]> >> *Sent:* Sunday, April 29, 2018 2:45 PM >> *To:* ANDY DURBIN; [email protected] >> *Subject:* Re: [Elecraft] KPA500/K3 AUX bus specification >> The AUXBUS protocol is Elecraft proprietary and is not published. >> It is the single wire communications between the K3 and its options, >> both internal and external. >> >> The K3 Programmers Reference and KPA500 Programmers Reference gives you >> commands that can be issued from a PC or other connected computer - >> those commands are quite extensive and can give you complete control >> from a PC. >> >> 73, >> Don W3FPR >> >> >>> From: [email protected] >> [[email protected]] on behalf of ANDY DURBIN >> [[email protected]] >>> Sent: Sunday, April 29, 2018 3:59 PM >>> To: [email protected] >>> Subject: [Elecraft] KPA500/K3 AUX bus specification >>> >>> Can someone please point me to a definition or specification for the >> KPA500 - K3 AUX Bus. I have the KPA500 Programmer's Reference but >> this appears to only cover the KPA500 - PC interface. > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
