[time-nuts] Re: Fixing PN degradation via ADEV measurement

[Bob kb8tq]

Hi

The CNT-91 has a very high noise floor if you are trying to “see”
phase noise. It also does not give you much in the way of frequency
offset information. A single mixer setup running into a sound card
is a *much* better approach if you are looking for another opinion 
vs the FSQ8. I have used the CNT 90 and CNT 91’s a lot. I have no
experience with the FSQ8.

Bob

> On Jun 18, 2022, at 10:42 PM, Karen Tadevosyan <ra3apw at mail.ru> wrote:
> 
> Hi Bob,
> 
> Thank you for the advice. An issue with PN of  25 MHz reference source has been decided - I found the PN source, changed schematic and now all works well. 
> 
> My question is about an opportunity to fix PN degradation by Pendulum CNT-91 frequency meter-analyzer (which I measure the Allan deviation) which allow to record significantly lower PN values than R&S FSQ8.
> 
> Karen, ra3apw
>