[Elecraft] (K3) filter setting shifts panadapter display

[Robert G Strickland]

Joe...

Excellent. Two equipment/function answers for one question. Very much 
appreciated. Have a good day.

...robert

On 10/5/2015 00:10, Joe Subich, W4TV wrote:
>
>> 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
>>>
>>
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-- 
Robert G Strickland, PhD ABPH - KE2WY
rcrgs at verizon.net.usa
Syracuse, New York, USA