[time-nuts] 35601A as stand-in for 11848A ?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sat Jan 5 19:50:35 EST 2008

Bruce Griffiths wrote:
> Phase noise calibration standard.
> Oops, since the lower frequency limit of a hybrid combiner doesn't
> extend to dc (a low frequency limit of 2-4KHz is possible) a resistive
> power summing circuit would actually be required for low frequency offsets.
> Bruce
Correction #2

To evaluate the effect of the PLL its actually necessary to add the
gaussian noise to the output of one of the OCXO's in the stnadard PLL setup.
Using a single source to drive both mixer ports (with and without noise)
will not measure the effect of the PLL.


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