On 1/10/22 9:56 AM, Bob kb8tq wrote:
Hi
An equally important part of this:
What are you driving with this OCXO and what is it’s measured noise floor
at 1 Hz (or 10 Hz or what ever ….). In some cases a “crazy” OCXO is actually
quieter than the device it is driving. That means that the last 5 or 10 db in
phase
noise improvement really has zero impact on the system performance. I’ve run
into this a *lot* of times over the years.
Bob
This comes up a lot with ADCs.. Wideband driver amplifiers on the clock
inputs may put more noise on the digitized signal.
An-756 from Analog Devices
Sampled Systems and the Effects of Clock Phase Noise and Jitter
https://www.analog.com/media/en/technical-documentation/application-notes/AN-756.pdf
and
Clocking the RF ADC: Should you worry about jitter or phase noise?
https://www.ti.com/lit/an/slyt705/slyt705.pdf
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