Someone asked about using the XG3 to measure the skirt attenuation of a
crystal filter.
If the phase noise is -105 dBc / Hz, then with a 500 Hz crystal filter
the filter skirts will disappear into the noise at about -105 + 10 *
log(500) = -78 dB. With a 2.7 kHz filter, it works out to -71 dB.
Al
John,
Sorry to hear that your 8640 is nearing its end.
My recommendation (and my personal preference) - hang onto the HP8640
for as long as it works - in the available signal generator field, it
cannot be beat for low phase noise along with a well calibrated output
attenuator. Sure it take
Hi John,
Phase noise is specified in the manual. It is a relatively constant
-105 dBc/Hz, even at very close spacings, which is excellent
performance for a low-cost, wide-range signal source.
I wouldn't amplify it to 1KW.
Let me know how it works for you as a replacement for the HP8640. Not
Hi
No phase noise performance data in the manual. What is the phase noise
performance of the XG3 like?
My HP8640 is being held together by a miracles and prayers, I need a
replacement.
73
John
--- On Wed, 4/13/11, Wayne Burdick wrote:
> From: Wayne Burdick
> Subject: Re: [Elecraft] New El
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