[time-nuts] HP 5370B jitter

Magnus Danielson magnus at rubidium.dyndns.org
Fri Jul 13 17:51:21 EDT 2007

From: SAIDJACK at aol.com
Subject: Re: [time-nuts] HP 5370B jitter
Date: Fri, 13 Jul 2007 17:16:38 EDT
Message-ID: <d48.c9234d4.33c945b6 at aol.com>

Hi Said,

> I sent spectrum plots of the 10MHz 5370B output to this list earlier, the  
> output is very sad. It's extremely dirty and jittery (well, compared to the
> 4ps noise you got, and compared to what the 10811 can deliver).

OK. So you have seen it too. I will ponder a little about if there is a cure
for it. Fortunatly the Frequency Buffer Board is fairly easy to get to.

I'll think I'll handgranade a hole on the lab-bench and pop the lid there.

> After calibration to 4ps, what does your 5370B unit read for it's  internal 
> RMS noise now?

Still annoyingly high. Don't remember the actual number. It was jumping around
like hell. I was not doing it properly thought, so I will redo it later

I'll also see what kid of numbers I can get from "good" sources. There is
plenty to pick from here at home.


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