[Elecraft] sharing K3 RS232 to CAT and Remoterig

[Don Wilhelm]

Jorge,

You cannot have RemoteRig and the K3 on the same COM port.  You must use 
2 different COM ports.  Otherwise, the K3 drivers and the RemoteRig 
drivers on the RS-232 connection will interfere with each other.

If you do a study of RS-232 mark and space voltages, you will find that 
it is a point to point (one to one) communication.  Other devices may 
"listen in" to the communications, but they must have all drivers 
disabled and set to a high impedance state.  The K3 and the RemoteRig do 
not meet that criteria, so they cannot co-exist on the same COM port 
connection.

The only solution is to use 2 COM ports (one for K3 and one for 
RemoteRig), and if they must synchronize, that will need to be done in 
the computer - but I don't know of any software application that will do 
that synchronization.

73,
Don W3FPR

On 11/14/2017 4:26 PM, Jorge Diez - CX6VM wrote:
> Hello Fred
> 
> I lost automatically antenna change because I needed to remove my CAT cable
> from K3 to connect remoterig. Of course if I removed remoterig RS232 cable
> and connect CAT cable all is OK as I had it before connecting remoterig
> 
> That switch A/B is not an option for what I am looking for,  I need both at
> the same time