[Elecraft] K3S RS232 "Y" Connector causing port conflict

[Eric Swartz - WA6HHQ, Elecraft]

If you need to block the TX lines from the amp to the K3 (or from the amp to the 
P3's computer connection if that is also in the system) making a custom cable or 
taking a M-F 9 pin adapter with the proper pins broken off can make it easy.)

The key thing to remember with RS-232 is that while you can usually have 
multiple devices listening to a path, only one can transmit.

73,

Eric
/elecraft.com/

On 12/14/2015 5:13 PM, Josh Fiden wrote:
> Charles,
>
> At this point, it seems like a silly question. BUT... have you tried 
> connecting it as the manufacturer (OM-POWER) suggests? If so, what happened?
>
> So far we know that you have tried using some Y-splitter on the RS-232 line. 
> It didn't work, and Don provided a clear and detailed explanation why that was 
> the case.
>
> Serial data is echoed bidirectionally through the OM2500A. There is no "listen 
> only" mode that I'm aware of. RTS and DTR are hardwired straight through.
>
> 73,
> Josh W6XU
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