[P3] Adjusting Center Freq in Narrow Span

[alorona]

Something that I've not been able to do successfully:

Tune to a standard frequency station, like WWV on 10 MHz. Center WWV on the P3
screen (in other words, make the Center Freq = 10000 kHz exactly).

I want to span down from 20 kHz to the minimum span, 2 kHz.

NOTE: FixTrack = Fixed-tune mode for the following.

As I span down, the center frequency shifts to something like 10002 kHz. So
then I try to adjust the center freq back to 10000 kHz exactly, but the P3 won't
allow it. As you approach 10000 suddenly the center frequency jumps back to
10002.


It's an aggravation. Maybe it's a function of my FixTrack settings but I haven't
been able to understand why.


Al  W6LX
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Don Wilhelm-4]

Al, I would start with the Calibration Reference Oscillator Calibration
as indicated in the manual (use Method 2).  After doing that, the K3 ref
osc calibration should be correct, and all other discrepancies should be
with the P3.  Refer to the P3 documentation for corrective actions.

73,
Don W3FPR

On 9/4/2012 11:09 PM, Al Lorona wrote:

> Something that I've not been able to do successfully:
>
> Tune to a standard frequency station, like WWV on 10 MHz. Center WWV on the P3
> screen (in other words, make the Center Freq = 10000 kHz exactly).
>
> I want to span down from 20 kHz to the minimum span, 2 kHz.
>
> NOTE: FixTrack = Fixed-tune mode for the following.
>
> As I span down, the center frequency shifts to something like 10002 kHz. So
> then I try to adjust the center freq back to 10000 kHz exactly, but the P3 won't
> allow it. As you approach 10000 suddenly the center frequency jumps back to
> 10002.
>
>
> It's an aggravation. Maybe it's a function of my FixTrack settings but I haven't
> been able to understand why.
>
>
> Al  W6LX
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Alan Bloom]

Hi Al,

You have to be in tracking mode for the frequency calibration to work
correctly.

73,

Alan N1AL


On Tue, 2012-09-04 at 20:09 -0700, Al Lorona wrote:

> Something that I've not been able to do successfully:
>
> Tune to a standard frequency station, like WWV on 10 MHz. Center WWV on the P3
> screen (in other words, make the Center Freq = 10000 kHz exactly).
>
> I want to span down from 20 kHz to the minimum span, 2 kHz.
>
> NOTE: FixTrack = Fixed-tune mode for the following.
>
> As I span down, the center frequency shifts to something like 10002 kHz. So
> then I try to adjust the center freq back to 10000 kHz exactly, but the P3 won't
> allow it. As you approach 10000 suddenly the center frequency jumps back to
> 10002.
>
>
> It's an aggravation. Maybe it's a function of my FixTrack settings but I haven't
> been able to understand why.
>
>
> Al  W6LX
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html