[Elecraft] P3 hookup

[Dick Dievendorff]

The SteppIR controller should be looking for IF auto-info "responses"
containing frequencies from the K3.  The P3 passes these through its serial
interface from the K3 to the computer side.

There is additional "private traffic" between the P3 and K3; very likely the
SteppIR controller is smart enough to ignore that chitchat. 

The serial connection between the P3 and K3 is always 38400 bps (and the P3
firmware should set this speed automatically).  

The serial speed between your Computer and P3 is whatever you set the P3 to.
Most computer software (and your StepIR) see the P3/K3 combination as a K3,
even though the computer serial cable is connected first to the P3.

If the SteppIR controller needs to be at a speed other than 38400, you'll
need to put it on the computer side of the P3.

Real experience (or info from SteppIR) should trump my theoretical opinion
here: I don't have a SteppIR controller.

Dick, K6KR

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mike
Sent: Wednesday, August 01, 2012 10:18 AM
To: Elecraft Reflector
Subject: [Elecraft] P3 hookup

I've got a P3 coming, and just downloaded the manual. If I understand
correctly from the diagram on p 13, the RS232 path is Computer--->P3--->K3.

Currently I have a "y" cable plugged into the K3. The cable from the 'puter
plugs into one leg of that, and the other leg goes to the SteppIR control
box.

Do I leave that where it is?

73, Mike NF4L

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