[time-nuts] Examples of traditional phase noise analyzers

[John Ackermann N8UR]

Hi Attila --

A really good place to start would be the docs for the HP 3048 phase 
noise system and associated app notes -- 
https://www.hpmemoryproject.org/technics/bench/3048/bench_3048_home.htm 
is a good place to start.  There's a *lot* of description there of how 
the system worked.

In a very brief nutshell, the main approach was to lock the DUT in 
quadrature with a reference at the same frequency and send the output of 
the phase detector to a spectrum analyzer measures the
1 Hz normalized power at various offsets.

John
----

On 12/17/20 6:02 AM, Attila Kinali wrote:
> Good afternoon,
> 
> In the process of writing my thesis I stumbled over the problem
> that the definition of what phase noise is in IEEE 1139 is a bit
> confusing, to put it mildly. After a short discussion with
> Magnus, it seems clear to me that I need to have a better
> understanding of how phase noise measurement was done in the
> past to properly understand what the standard means to say.
> 
> I think, I have a decent grasp on how modern phase noise analyzer
> work, safe for a few details here and there, where they seem to
> try to mimic what the old analog analyzers did.
> 
> Before I go on a wild goose chace, I thought I ask here for
> advice: Could you point me at as detailed as possible descriptions
> on how phase noise analyzers used to work in the purely analog
> times? Preferably also as many different approaches as possible.
> And, if you are aware of anything that I should have a look at
> that might not be obvious to a youngster like me, I would very
> much appreciate if you would let me know.
> 
> Thanks in advance
> 
> 			Attila Kinali
>