Hi Dick: Thanks - the diagram makes things very clear. I initially didn't think of accomplishing the split at the KXPA 3.5mm connector, but it makes sense.
Thanks, 73, Steve NU7B > On Jul 8, 2018, at 1:38 PM, d...@elecraft.com wrote: > > Typically "sniffers" don't have the TX side connected. RS-232 can't have > multiple transmitters on either wire. > > This is done with SteppIR controller, for similar reasons. SteppIR > describes a splitter cable for DE-9 connectors. The same principle (with a > much simpler cable, just tip and ring) applies to the 3.5mm connector to the > KXPA100. > > http://www.steppir.com/wp-content/uploads/2011/10/Y-Cable.pdf > > 73 de Dick, K6KR > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On > Behalf Of Stephen Rector via Elecraft > Sent: Sunday, July 8, 2018 12:31 > To: elecraft@mailman.qth.net > Subject: [Elecraft] [KX3] RS232 xcvr control when serial ports are occupied > > Hy home station is a KX3 + KPXA100, and I can control the radio via the > RS232 port on the KXPA. However, recently I added a Ciro Mazzoni magloop to > the station, and its controller plugs in to the KXPA serial port to sniff > for frequency information, allowing re-tuning on the fly. This leaves no > RS232 port left for remote control of the radio. > > How do I modify this arrangement to add an extra serial port for KX3 > control? My first thought is that, since the antenna controller just sniffs > for data, I could add a DB-9 Y-cable to provide the extra port at the > controller serial port location. However, packets could still collide > ...does the protocol handle this? Is there some sort of multiplexer > available? > > Thanks, > > Steve > > NU7B > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to d...@elecraft.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
