[time-nuts] retry: PRS10 has spurious frequencies
Henk ten Pierick
henk at deriesp.demon.nl
Mon Apr 23 14:26:13 EDT 2007
On Apr 23, 2007, at 20:13, SAIDJACK at aol.com wrote:
>> Your nice picture shows a -95dBc phase noise at 10Hz.
>> The SRS spec for PRS10 is -130dBc at 10Hz. Can you explain that
>> difference of 35dBc?
> The X axis is labeled in exponential form by the TSC instrument, it's
> actually -95dBc/Hz at 1Hz (10E0), and -130dBc/Hz at 10Hz (10E1)
> just meeting the
> SRS specifications
I should have looked better....
>> Did you measure wideband spectrum of the PRS10 output? Up to 1GHz?
> Not yet, but I will try that tonight.
>> BTW: do you have Visi for windows by any chance?
> An old evaluation version3
> Can I get a copy for evaluation from you please? I bought version
> 1.16, very
> old and have been desperately trying to find a more modern version
> that runs
> on Win2K etc.
I will zip and send off list.
>> Do you have the Vectron OCXO specs?
> No, but someone on this list mentioned some time ago that they sold
> units to Vectron (Bruce?) and posted some specs, I forgot who that was
It is not clear to me if it is possible to measure the PRS10 10Hz
phase noise spec with the Wavecrest.
> 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....
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