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List:       elecraft
Subject:    Re: [Elecraft] KXSER CABLE INFO
From:       "Cady, Fred" <fcady () montana ! edu>
Date:       2018-01-31 15:21:23
Message-ID: CY4PR02MB2808399F5F8EEB9667ED447DAFFB0 () CY4PR02MB2808 ! namprd02 ! prod ! outlook ! com
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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@mailman.qth.net <elecraft-bounces@mailman.qth.net> on behalf \
                of NOEL POULIN <ve2fww@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

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