[Elecraft] K3s / P3 baud rate, poor man's 2nd receiver

[Nr4c]

No need to waste a lot of time on this. Set all to 38400, the default speed for the P3 to work well. 

Sent from my iPhone
...nr4c. bill


> On Oct 12, 2018, at 3:28 PM, Henk de Vries (hdv) <hdv1 at kpnplanet.nl> wrote:
> 
> Hi all,
> 
> 
> 
> Using my home-made RS232 sniffer in order to capture K3s frequency
> information while my K3s is exchanging information with Wintest I found some
> non-obvious behaviour of the PC - K3s USB baud rate that might interest
> others as well.
> 
> 
> 
> The set-up is PC <a> USB <b> K3s <c> RS232 <d> P3 <e> (PC port of P3) 
> 
> <x> = connector/port
> 
> 
> 
> Normally all baud rates are 38400 bd. 
> 
> The link <c> RS232 <d> is 38400 bd and cannot be changed.
> 
> 
> 
> When changing the baud rate of the P3 (with P3 menu) the rate on <e> becomes
> the selected rate (as expected), so 4800, 9600 or 19200 bd.
> 
> However also the rate on <a> (USB) <b> is changed to this rate.
> 
> 
> 
> So the P3 is always in control of the baud rate towards the PC, no matter
> the connection towards the PC; via USB port on the K3s or via RS232/PC port
> on the P3.
> 
> However, when the P3 is switched off, the <a>USB<b> rate reverts to the
> default setting of 38400 bd (of the K3s).
> 
> 
> 
> I thought it worth mentioning, because this behaviour is not explained in