Hi Dick Thank you very much for your detailed explanation.
The methodologies for the auto band switching of the KAT500 are too complex for me so I will have to stick with the RF sensing, except of course when I use the K3 !! Thanks again for your response. It really is appreciated. 73 Barry Simpson VK2BJ On 31 March 2013 01:42, Dick Dievendorff <die...@comcast.net> wrote: > Barry: > > The KPA500 has a dedicated serial port for its PC connection and another > dedicated serial connector for connection to a Kenwood radio. > > The KAT500 has one serial port, which is intended for connection to a PC. > > The strategy we'd planned for the KAT500 is to band switch on Tx signal or > the BAND lines on the ACC connector, and the KAT500 does that > automatically. > > > But as you point out, KPA500 performs band switch when it receives a serial > Kenwood command, and the KAT500 waits for a transmitted signal. > > There are a couple of strategies: > > I've heard of small microcontroller projects that listen to a Kenwood radio > serial connection and set the 4 BAND lines on the accessory connector to > band switch. > > An alternative might be a microcontroller that has two serial ports, one > that accepts (or at least tolerates) the Kenwood command set, and another > serial port that emits the KAT500 command needed to change frequenices. > > While RS-232 is not a "bus" system, you can sometimes Tee off a listener. > > I did implement a KAT500 command that accepts FA with an 11-digit > frequency, > down to the Hz, and when the KAT500 receives that command, it performs a > "memory recall tune" for that frequency. This was done for a colleague who > is working on a Kenwood implementation. > > But we didn't design the KAT500 to accept the complete Kenwood command set. > If the Kenwood radio happens to send a command like "AN1;", the KAT500 will > switch antennas to its ANT1. > > 73 de Dick, K6KR > > > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Barry Simpson > Sent: Saturday, March 30, 2013 1:36 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] KPA500 and KAT500 with Kenwood > > Good morning > > I have been using my TS590 with the serial cable connected to the KPA500 > and > that works nicely to change bands automatically once set up in the menu. > > The KPA500 is also connected to my KAT500 using the K3 cables (they are > simply left in place and the K3 is switched off when using the TS590). > > However, with the TS590, the KAT500 does not change bands as the KPA500 > does, other than with RF sensing. So I have the situation where the KPA500 > does change bands with the TS590 but the KAT500 doesn't. > > Does anyone know if there is a way to implement auto band change on the > KAT500 with Kenwood equipment so that it changes at the same time as the > KPA500 ? > > I await any responses with interest. > > Thanks and 73 > > > Barry Simpson VK2BJ > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
