[Elecraft] Adding DSR (serial port line 6) interrupt in a Firmware Update?

[Lance Collister]

That also was what I saw....so that standard pin is currently free to have that 
interrupt capability added.  Frankly, I am a bit surprised that it wasn't already 
built in, since the K3 incorporates so many features to try to create flexibility 
and eliminate the need for external computer interfaces.  However, I think it is 
very encouraging to see that pin #6 is not currently used for some other unusual 
application, and is still available for this feature to be added.  I hope that 
there is some way that it can be provided.

VY 73, Lance

Dick Dievendorff wrote:
> If I read the KIO3-D Sub RS232 IO Board schematic correctly, pin 6 of J24
> (the 9-pin RS-232 connector) is not connected to anything inside the K3. The
> labeled (connected) pins are:
> 
> 2 (RXD OUT)
> 3 (TXD IN)
> 4 (DTR IN)
> 5 (COMMON)
> 7 (RTS IN)
> 
> Dick, K6KR
> 
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Lance Collister
> Sent: Thursday, February 05, 2009 7:26 PM
> To: 'Elecraft Group'
> Subject: [Elecraft] Adding DSR (serial port line 6) interrupt in a Firmware
> Update?
> 
> I recall that there was an email recently that the K3's internal DVR was 
> interrupted when the microphone or footswitch is activated to manually
> transmit. 
> I am very interested to learn if it might be possible at the same time to
> also 
> send an interrupt signal to the unused DSR line (serial pin #6).  This
> interrupt 
> is used by several computer programs (TRX-Manager, Multikeyer, Voice Keyer 
> Express) at my station that automatically key the rig and send CW (via the
> DTRor 
> SSB messages.
> 
> Although these programs have primarily been used here for VHF meteor scatter
> 
> schedules, they are also very handy for working contests and other band
> openings. 
>   The K3 is of course well suited to work with any such external computer
> programs 
> due to its built-in audio interface.  However, when the operator switches to
> 
> manually keying the K3, it would be really great if an interrupt could be
> sent to 
> the computer programs via the serial port so that they stop their automatic
> keying 
> of the PTT line and also stop sending audio or CW signals to the K3.  Adding
> a 
> computer interrupt on the (currently unused) DSR line would accomplish this
> and 
> broaden the flexibility of the K3.  Thanks for your kind consideration!
> 
> VY 73, Lance
> 


-- 
Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8)
P.O. Box 73
Frenchtown, MT  59834  USA
QTH: DN27UB
TEL: (406) 626-5728   URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11, 6m DXCC #815