K3--CAT IS command will shift IF while in TX

[Nate Bargmann]

I was asked by John, K0VET, to verify a behavior he observed last night
on his K3.  He was playing with HRD and found that by changing the IF
Shift while transmitting that it took him off frequency.  He
demonstrated it for me and sure enough, his radio went off frequency
(1.947 LSB).

I fired up the K3 utility and issuing the following commands, "IS 0500;"
and "IS 1800;" I was able to replicate the behavior on my K3.  As soon
as I stopped transmitting and transmitted again I was back on frequency
even though the shift was still in effect on RX.  So, what I surmise is
that the IF shift is not locked out on the CAT port while transmitting.
Both John and I have the latest 4.22 firmware loaded.  The front panel
Shift control does not exhibit this behavior.

73, de Nate N0NB >>

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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[Jim Sheldon]

I had noted the same problem with HRD but attributed it to HRD.  I had not been playing with the IF shift, but did have some RF feedback problems that came from an USB dongle soundcard I was experimenting with.  

It also messed up some of my other settings, so I just reloaded a previous configuration I had saved with the utility.  That took care of the problem and I didn't think about it again until I saw this post.

Jim - W0EB

> I was asked by John, K0VET, to verify a behavior he observed last
> night
> on his K3.  He was playing with HRD and found that by changing the
> IF
> Shift while transmitting that it took him off frequency.  He
> demonstrated it for me and sure enough, his radio went off frequency
> (1.947 LSB).
>
> I fired up the K3 utility and issuing the following commands, "IS
> 0500;"
> and "IS 1800;" I was able to replicate the behavior on my K3.  As
> soon
> as I stopped transmitting and transmitted again I was back on
> frequency
> even though the shift was still in effect on RX.  So, what I
> surmise is
> that the IF shift is not locked out on the CAT port while
> transmitting.
> Both John and I have the latest 4.22 firmware loaded.  The front
> panel
> Shift control does not exhibit this behavior.
>
> 73, de Nate N0NB >>

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