[Elecraft] K3, KPA500, StepIRR, Navigator, PC cabling

[Don Wilhelm]

Jim,

Remove the RS-232 cable to the KPA500 - it needs to be on a port that is 
different (or not connected at the same time) from that used by the K3.  
The KPA500 port is only used for firmware updates.

In fact, since the KPA500 and the K3 both contain RS-232 drivers, they 
will get confused and not work properly if connected together.  RS-232 
is point to point only, no daisy chaining.

Plug the SteppIR cable into the Y that connects to the K3.  The SteppIR 
has only receivers and just listens on the conversation between the 
computer Navigator) and the K3 - that is OK since no drivers are involved.

73,
Don W3FPR

On 2/24/2012 4:56 PM, James Meade wrote:
> What cabling and settings are needed to connect a Windows 7 Pro computer
> to the K3, a SteppIRR antenna controller and a U.S. Navigator so they all
> talk to each other?  I'm running an RS232 cable from the PC to the K3, the
> aux cable from the K3 to the KPA500, and a Y RS232 cable from the K3 with
> one leg to the Navigator and one to the KPA500.  How does the SteppIRR get
> involved?
> Thanks,
> Jim NO0B
>