Tighe,
Check your menu CONFIG: PTT-KEY entry. Set it to OFF-OFF and see if the
problem stops.
Something in your computer setup is probably activating either RTS or
DTR or both.
73,
Don W3FPR
On 2/16/2014 8:01 AM, Tighe Kuykendall wrote:
Strange issue and haven't found much by searching.
I use a MacBook Pro with my K3 and KX3. It had worked fine for rig
control and with the K3/P3/KPA utilities. I added an iMic audio
interface (bought it for the iPad and was experimenting) and setup
CocoaModem for use with the KX3 to do digital modes. When I connected
the MBP back to the K3, any type of USB activity for rig control or
the K3/P3/KPA utilities causes the K3 to go into TX which can't be
stopped except by unplugging the USB from the MBP. If there's no USB
control activity with an app, the K3 works normally.
I simplified the radio down to just the K3 with no other accessories
and it still happens. KPA utility works as expected with the KPA,
even with the K3 powered ok and it going into TX. I checked for
grounding issues and reseated all of the serial cables. The USB ports
work normally for everything except interfacing to the K3. I tried a
different MacBook with the K3 and it works fine, so it's something
with the MBP side of the USB connection on my shack laptop.
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