[time-nuts] OXCO Spurious Output at Line Frequencies
martyn at ptsyst.com
Tue Jul 12 06:44:31 EDT 2016
I have a customer who is measuring the phase noise of my 10 MHz ultra-low phase noise frequency standard.
He is seeing spurious signals at line frequencies (50 and 100 Hz as we are in Europe) at a level around -130 dBc.
My opinion is that it's impossible to get much better than that. Even running on batteries make little difference, since the equipment is in a test rack with AC signals everywhere.
Even the £50k R&S test set he is using only quotes a spurious spec of -90 dBc.
What experience does anyone have here?
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