[Elecraft] sharing K3 RS232 to CAT and Remoterig

[Mitch Wolfson DJ0QN / K7DX]

Don and everyone,

The RemoteRig  RRC actually provides a built-in method to provide this 
duplicate CAT data.

Since the RRCs' COM2 are already occupied to tie the two ends together 
using CAT, all you have to do is to change each RRC's COM1 to mode-7. 
This will duplicate CAT over COM1 and you can use it in for control. 
Each RRC will provide the CAT data separately, so you can run a CAT sync 
device such as SteppIR, amplifier, etc. on the radio side and a 
logging/control program on the control side simultaneously and 
independently. Also note that the baud rate on COM1 must not necessarily 
be identical with COM2.

73,
Mitch DJ0QN / K7DX

On 14.11.2017 18:04, Don Wilhelm wrote:
> 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
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-- 
Mitch Wolfson  K7DX / DJ0QN
10285 Boca Cir, Naples, FL 34109
Skype: mitchwo
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