[Elecraft] (K3) filter setting shifts panadapter display

[Joe Subich, W4TV]

> Not sure what the connection is, but it resoled the display problem.

The K3 shifts the IF center frequency based on mode, Shift/FC, and
selected filter to center the desired signal in the filter.  Without
knowing the IF center frequency (the IS; Get command), the panadapter
[assumed] center frequency will differ from the true IF center freq
by approximately +/- 3 KHz.

In this section I had polling for "IF Frequency" unchecked.

When you enable polling for IF Frequency, NaP3 can correct for the
actual IF frequency rather than assume a nominal value for each mode.

73,

   ... Joe, W4TV


On 10/4/2015 7:08 PM, Robert G Strickland wrote:
> I think I solved this...
> In NaP3 there are options for polling various rig parameters [CAT
> Polling]. In this section I had polling for "IF Frequency" unchecked.
> Once checked, all signals stayed where they belong. Not sure what the
> connection is, but it resoled the display problem. Thanks for everyone's
> help. It kept me at it till I came across this item.
> ...robert
>
> On 10/3/2015 21:54, Robert G Strickland wrote:
>> I have a K3 [w/ new synthesizer], an LP-Pan, M-Audio Delta, and running
>> NaP3v4. K3 filters are: 2.7/8p, 1.9/8p, 500/8p, 200/5p. Not sure "where"
>> this is happening, but decided to start here.
>>
>> On CW, using the K3 CWT to center a signal, the pan display frequency
>> for the signal shifts around as follows:
>>
>> Filter        Freq Display
>> 2.7        2,104cps high
>> 1.9        1,580cps high
>> 500          888cps high
>> 200        1,730cps high
>>
>> Note, NaP3's "global offset" is zero'd on WWV at 10MHz. I've reached a
>> barren bottom trying to figure this out, and I'd appreciate any wisdom
>> that others have to offer. Thanks.
>>
>> ...robert
>>
>