Hi Noel, No, you don't have to tie those together unless the software you are using needs them for some sort of flow control handshaking, but that too, would be unusual because back in the days of modem RTS (Request to Send) and CTS (clear to send) were used by the modem to let the terminal (your computer) know it was ok for it to send data. DTR (Data Terminal Ready) was a handshaking signal from the data terminal (computer) to let the modem know it was OK to send data to the terminal. Handshaking flow control is not used these days and so that is why RTS and DTR are often used by logger programs for CW and PTT. The K3 allows this because its serial port implements them. The KX3 can't because its serial port is only for data (TxD and RxD).
(An exception that I seem to remember is that some Kenwood radios needed RTS and CTS jumpered on the radio side.) Cheers, Fred KE7X For all KE7X books see www.ke7x.com<http://www.ke7x.com> ________________________________ From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf of NOEL POULIN <ve2...@globetrotter.net> Sent: Wednesday, January 31, 2018 4:18 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] KXSER CABLE INFO Hello I am wiring my own KXSER Rs232 cable ...DB9F TO 3.5 MM JACK Here is what I have for connections. DB9F 3.5MM JACK pin 3........................................Tip pin 2........................................Ring pin 5........................................Sleeve. I saw somewhere that pins 4 (DTR) AND PIN 8 CTS) on the DB9F must be connected together.... I AM NOT SURE... Anyone can tell me if those pins 4 and 8 must be together....(CONNECTED) Thanks Noel ______________________________________________________________ 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 fc...@montana.edu ______________________________________________________________ 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
