[Elecraft] KXSER CABLE INFO

[Cady, Fred]

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-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of NOEL POULIN <ve2fww at globetrotter.net>
Sent: Wednesday, January 31, 2018 4:18 AM
To: Elecraft at 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

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