John,

The com port is most likely activating either DTR or RTS during its 
power up testing.
To prevent the K3 from responding, go to the CONFIG menu and set the 
parameter for PTT--KEY to Off Off.

73,
Don W3FPR

On 9/16/2011 10:28 AM, John Watkins wrote:
> When I have the K3 turned on when I start up my laptop and it happens to be 
> in SSB mode the com port I use for the utility apparently causes the PTT to 
> send about 5 longs T's over the air.  If I am in CW no problem because I have 
> told the rig to come up with VOX off.
>
> Is there a setting that will prevent this unattended transmission while in 
> SSB mode?
>
>
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