[time-nuts] E1938A PN measurments

[Richard (Rick) Karlquist]

The E1938A uses a crystal that is basically the same as
the 10811 crystal except that it is in a reduced height
package.  However the phase noise is not as good as a
10811 due to broadband noise in the automatic frequency
control circuit.  By the time I discovered this, it
was too late to try to fix it.

Rick Karlquist N6RK
E1938A designer