[time-nuts] 35601A as stand-in for 11848A ?
bruce.griffiths at xtra.co.nz
Sat Jan 5 20:07:23 EST 2008
John Miles wrote:
> While that makes sense as an optimization step, I think it's important not
> to send him on an endless hunt for a few extra dBc/Hz' worth of accuracy
> when he's missing 30 or 40. He can get to -160 dBc/Hz with only the
> 1980s-era guidelines in the HP and Wenzel app note, which are relatively
> simple (if still error-prone when executed manually).
> -- john, KE5FX
Such a calibration standard is also useful as a quick check to see if
its phase noise can be seen at the appropriate level above the noise floor.
If not there's a serious problem, if it can be seen then there may be
just a calculation error.
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