[time-nuts] Anritsu MH-4100A xtal osc (Pete Lancashire)

[Bob Camp]

Hi

You would *hope* that they used a narrow PLL to lock to the external
reference on the signal generator. That would make the decision easy. They
can't / don't always take them down far enough though.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of jimlux
Sent: Tuesday, March 30, 2010 9:09 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Anritsu MH-4100A xtal osc (Pete Lancashire)

Dave Baxter wrote:
> This might interest you....
> http://www.members.shaw.ca/swstuff/gpsreference.html
> 
> These people can cal' it, they say.
> http://www.raelectrical.com/services/anritsu-2.htm
> 
> There are several other hits, including other people who stock used
> items.
> 
> Amazing what you find when you google....
> 
> My guess is in it's original form, it's a small lab standard,
> calibrateable, and no doubt intended to be powered on 24/7 for
> stability.
> 
> Even where absolute accuracy is not needed, a common frequency reference
> for multiple instruments is often desirable, especialy where there are
> sources and measuring instruments used for a common task, so as to
> minimise differences between them.
>


Oh yeah.. there's always the discussion at work about whether you use 
the internal 10 MHz from the counter or the internal 10 MHz from the 
signal generator as the "master" for your setup.

The counter typically has better accuracy over the long term, but the 
signal generator usually has better close in phase noise.

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