[Elecraft] [KX3] RS232 xcvr control when serial ports are occupied

[Don Wilhelm]

Andy,

No TXD is TXD all the way through the path.  Yes, the DTE TXD will have 
the drivers, and the DCE will have receivers, but it is TXD from end to 
end.  RXD is the other way around because the DCE drives that line.
Trsnsmit and receive are named with respect to the DTE.

73,
Don W3FPR

On 7/8/2018 8:39 PM, ANDY DURBIN wrote:
> "TXD is really pin 3."
> 
> 
> One end's TXD is the other end's RXD. That's obvious to those who have used RS-233 for a while but if someone needs to ask then it may not be obvious. Find the TXD pin on the source and connect it the RXD pin on the destination. Sometimes it's easier to look with a scope than to try to understand the documentation.