[time-nuts] Underlying math of cross-correlation PN Test Sets

[Joseph Gwinn]

I'm digging into the basic math of how cross-correlation phase noise 
test sets (like the 53100A) work, so I'm looking for good articles on 
the complex-exponentials math. 

One item of interest is the effects of imperfections in the power 
dividers that make a pair of perfect copies of the reference signal 
in a residual-PN setup.  I gather from Walls 1992 that the limit on 
cancellation of signal-source PN is the imperfect isolation of the 
power divider.

I'm more interested in clarity of exposition and the physics than in 
solid walls of pure math.  

Thanks

Joe Gwinn