Richard,

You must have communications between WSJT-X and the K3S in order for WSJT-X to know the band that is selected on the K3S.

A standard USB cable is all you need between the computer and the K3S. Be certain you do not accidentally try to plug it into the RJ-45 jack because that will damage the jack. Make certain the RS232 menu parameter is set to USB.

If you also have the P3, you should be using the CBLP3Y cable between the K3S and the P3 (and the setup is the same as the USB). If you are currently using the RJ45 dongle on the K3S to connect with the P3 and plugging an RS-232 cable (or adapter) into the P3 PC connector, that should work too. If this is the connection you have to the PC, set the RS-232 menu to 38400 baud.

You must tell WSJT-X which COM port is connected to the K3S - yes, a USB port with an adapter inserted will have a COM port assigned by the computer. That also goes for the K3S connected with a straight USB cable (the USB to RS-232 adapter is in the K3S).

73,
Don W3FPR

On 9/12/2018 4:06 PM, Richard wrote:
K3S, Mac Sierra 10.12, WSJT-X version 1.8.0.

Everything is working perfectly. Well, 99.874% is working perfectly. The little 
WSJT-X dropdown menu for band selection doesn’t follow band changes I make at 
the K3S. The same problem exists between my friend’s Kenwood TS-990s and his 
similar Mac running WSJT-X version 1.9.1.

I am told this can be facilitated with “a cable” between the K3S and the Mac: 
RS-232 connector at the K3S and USB-A at the Mac.?

Is this correct? If not, what DO I need?

Do I need to make any Menu or Config changes to activate this?

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