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

Don Wilhelm w3fpr at embarqmail.com
Fri Feb 24 22:33:37 EST 2012


I just discovered that I used the term "drivers" in my response.  That 
can be ambiguous in today's world.
I was using "driver" to designate a hardware device that would "drive" 
an RS-232 signal line.
My use has nothing to do with software drivers that may or may not be 
associated with RS-232 devices connected to the computer.

I hope I did not confuse anyone.

73,
Don W3FPR

On 2/24/2012 5:19 PM, Don Wilhelm wrote:
> 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
>>
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