[time-nuts] xtal oscillator phase noise
Tom Van Baak
tvb at LeapSecond.com
Tue Jan 1 14:02:07 EST 2008
> For what it's worth, the Wenzel 5 and 10 MHz ULN oscillators are
> generally considered to be about the lowest noise oscillators
> commercially available. They really shine in their noise floor.
> There's actually (at least) one 5MHz oscillator with a better 1Hz offset
> spec -- the Oscilloquartz 8607-08 BVA at -130 dBc/Hz, though its noise
> floor at about -160 dBc/Hz is nothing like the Wenzel's.
> Here's some data on the Wenzel units from their web site:
> 5 MHz 10 MHz
> 1 Hz -120 -105
> 10 Hz -150 -135
> 100 Hz -170 -160
> 1 kHz -176 -173
> 10 kHz -176 -175
Good timing; yesterday, John Miles was over here to test some ULN.
Here's a Wenzel ULN 5 MHz against a ULN 10 MHz.
(these are relative measurements; absolute would be ~ 3 dB better)
Also, for those interested, two 8607-08 BVA against each other:
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