[Elecraft] FW: P3 and K3 RS-232 baud rates

[Alan Bloom]

When the P3 is in line, the baud rate that the logging program sees is
that of the P3, not the K3.  If the logging program wants 4800 baud,
that needs to be set on the P3.

One way to look at it is that the P3 is "pretending" to be the K3.  The
logging program thinks it is talking to the K3 at 4800 baud.  The P3
takes that data 4800-baud and re-sends it to the K3 at 38400 baud.

Alan N1AL



On Tue, 2010-09-14 at 20:07 -0400, Tommy Alderman wrote:
> On page 13 of the P3 Owner's Manual, in the section 'RS232 XCVR', the last
> sentence states: "The K3 baud rate is set automatically by the P3 and cannot
> be changed at the K3" Based on that, is it correct that if I set the P3 baud
> rate to 4800 b, then the K3 will be operating at 4800 b even though
> CONFIG:RS232 reads 38400b?
> 
> Thanks,
> 
> Tom - W4BQF
>  
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Tommy Alderman
> Sent: Tuesday, September 14, 2010 6:12 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] P3 and K3 RS-232 baud rates
> 
> P3:	s/n 464		Firmware 00.32  	Rcvd 9/14/10
> K3:	s/n 4521	Firmware 4.10		Rcvd 8/2/10
> I have an old logging program that I do not want to lose or have to change.
> My first problem, because this program is so old (YPlog) was solved by
> selecting a Kenwood TS570D as the xcvr and setting the baud rate at 4800/1
> stop bit. That works fine.
> 
> Today, W4TV published an email explaining how to reset the P3 baud rate from
> its default of 38,400 back to 4800. That works. Unfortunately CONFIG:RS232,
> when I change the baud rate from 38400 to 4800 and press MENU/CONFIG again,
> the baud rate change is not saved in the K3 and I can no longer connect to
> my logging program. The only work-around I have found so far is to turn off
> the P3, set the K3 CONFIG:RS232 from 38400 to 4800, then press MENU/CONFIG,
> then turn the P3 ON again, and all works correct.
> 
> Will there be a firmware update that will allow the P3 and the K3 to be set
> at baud rates other than 38400 when BOTH the K3 and the P3 are turned on?  I
> certainly hope so because this YPlog is the only logging program I have
> found in some 20 years that will allow me to send CW at speeds over 60 wpm
> without the CW stuttering due to I/O interrupts from a CPU.
> 
> Thanks and 73,
> 
> Tom - W4BQF
> 
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