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

[Fred Jensen]

The flaw is naming them "transmit" and "receive."  "DTE2DCE" and vice 
versa might have been a better choice so many years ago.  "Data 
Terminal" and "Data Communications" were probably equally poor naming 
choices, but it seemed so obvious then.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/8/2018 6:21 PM, Don Wilhelm wrote:
> 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.
>