The AC series is really quite good on phase noise; I used it in
the 5071A at 80 MHz.

Rick N6RK

On 9/14/2018 12:55 PM, Dana Whitlow wrote:
Frequency dividers can be pretty low noise, if you choose the right class
of logic.  I remember that
at one time in the distant past, LSTTL was considered king.  Unfortunately
I've been out of touch
with frequency dividers long enough to be ignorant of what works well today.

i'd suggest trying something with either HC-series or AC-series CMOS,

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