[time-nuts] retry: PRS10 has spurious frequencies
SAIDJACK at aol.com
SAIDJACK at aol.com
Mon Apr 23 18:39:44 UTC 2007
In a message dated 4/23/2007 11:27:39 Pacific Daylight Time,
henk at deriesp.demon.nl writes:
>I will zip and send off list.
Thanks!!
>
>> Do you have the Vectron OCXO specs?
>
> No, but someone on this list mentioned some time ago that they sold
> these
> units to Vectron (Bruce?) and posted some specs, I forgot who that was
> unfortunately...
>It is not clear to me if it is possible to measure the PRS10 10Hz
>phase noise spec with the Wavecrest.
>Any idea?
I used a SIA-3000 in FFT mode for phase noise measurements, they really are
not that great for that purpose. Don't think we can get down to -130dBc at
10Hz with accuracy.
Then again one could measure loads of TI data on the DTS, and do an FFT on
that data.
> I had a third DTS unit for parts, and that unit's Vectron was out
> of spec
> (just shy of 100MHz at full mechanical deflection unfortunately).
> Datecode 1994,
> so not too bad.
>So, if I need parts....
No prob :)
I suspect that replacing the simple Vectron 100MHz OCXO with a more modern,
lower noise Wenzel etc could improve the instruments performance. That OCXO
should be locked to GPS as well of course :)
bye,
Said
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