It's not a K3 "feature" either. It happens with my K2 for the same
reason. The computer tests the serial port and if the K2 is on, the PTT
gets keyed. No fix other than to put the rig in Test or turn it off when
booting the computer.
Eric
KE6US
On 4/16/2013 11:52 AM, Don Wilhelm wrote:
Lee,
That behavior is NOT dependent on when the K3 is powered up - unless
the K3 is powered on only after the computer completes its boot cycle
and the OS is loaded.
It does happen every time the computer boots - the computer port
testing will activate the DTR and RTS lines for a short time.
There is nothing in the K3 that can prevent that from occurring.
Yes, if you have the K3 menu set to use DTR or RTS for PTT or keying,
it would be a good idea for you to place the K3 into TX TEST whenever
the computer is powered up.
73,
Don W3FPR
On 4/16/2013 1:55 PM, Lee Hill wrote:
Hi:
I recently purchased a used K3.
I have noticed the exact problem described in posts in 2008,
http://marc.info/?l=elecraft&m=121462133723056&w=2
where the K3 goes into transmit due to a connected computer's serial
port
- when the computer first powers up and the serial port has not yet
been
configured by a logging or serial control program.
The undesired behavior stems from the K3 PTT being asserted by the
computer
at the rig's serial port via DTR or RTS (depending on the K3 setup) The
problem goes away after the logging or serial port control program is
launched.
Was a feature discussed in the above post implemented in later firmware?
The feature is the rig detects an asserted PTT during the first
couple of
seconds of power up and goes into TX test mode and/or displays and
error.
I haven't done any HW or firmware upgrades to the rig yet.
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