[hpsdr] Atlas based system TX freq high...

[Pete Thompson]

After checking all software settings and finding nothing obviously 
wrong, I tried a database reset.  This also had no effect on the problem.

I then shut the system down and removed Excalibur and ran the system 
without that module.  Again, no change - problem still apparent.

I reinstalled Excalibur but in a different board slot and low and 
behold, the problem is fixed.

I noticed that there is a green LED illuminated on Excalibur. Can't say 
for certain if that was illuminated when the module was in the previous 
slot.  In any event, the problem seems to be fixed.

Thanks for comments, suggestions.

Pete



On 1/3/2021 6:26 PM, w4yn at earthlink.net wrote:
> See of you can find the plug in high stability oscillator can't 
> remember the name of the card
> It was available from TARPA
> Tim
>
> Sent using myEarthLink
>
> On Sun Jan 03 09:05:19 EST 2021 Pete Thompson wrote:
> I have an Atlas system (Metis, Penelope, Mercury, Excalibur).
>
> I have recently noticed that the TX frequency is slightly high.  On 
> 40m, it is approx 70Hz high, on 20m about 140Hz high.  RX frequency 
> seems to be fine as verified with WWV and also external Elecraft 
> signal reference on 7040KHz.
>
> I have verified the unwanted TX offset via another radio (SDR-1000).
>
> I can correct for the offset using XIT.
>
> The internal oscillator is linked to Mercury as shown in the setup 
> screens.
>
> I'm running latest PowerSDR Mrx and firmware and using Windows 10.
>
> I recently upgraded to latest powerSDR.  At that time the upgrade 
> installation procedure was able to apparently successfully import the 
> existing database (although I was expecting to have to do a full 
> manual database setup). The previous install was 3.3.9 IIRC.  I do not 
> know if the TX offset was present with that version.
>
> Any ideas appreciated.
>
> Pete, MM0INE/N3EVL
>
>
>

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