[time-nuts] HP 5370B question

[Robert E. Martinson]

Here are the retest results.  The cable length is now doubled, was 4 feet,
now it's 8 feet.

min	9999999.99571
max	9999999.99924
avg	9999999.99759
median	9999999.99767

Quite similar, within less than 1 mHz of the first run.

If you or anyone else wud like the raw data & graphs, I can send them
easily.

Tom, enjoyed the article & pics in "Wired".  I read it on line.

Regards,
Bob Martinson, N1VQR




-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Tom Van Baak
Sent: Saturday, December 22, 2007 5:16 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B question


Bob,

Can you re-run your test with a different length of loop-back cable?
Something between a few more feet and a few more inches is fine.

/tvb

>I ran my 5370B for one hour, counting its own reference with a one second
> gate.  The summary of the results are:
> 
> min 9999999.99650  Hz
> max 9999999.99963  Hz
> avg 9999999.99796  Hz
> median 9999999.99787  Hz
> 
> Per the manual's  Performance Test 5 (page 4-12) the spec is +/- 0.005 Hz.
> It would be nice if my average was 10,000,000.000 HZ but??  From a
Time-nuts
> thread of several months ago, the adjustment for this result is very
touchy
> and it's likely you will make the result worse rather then better.  Since
> mine is in spec, I'll leave it alone.
> 
> I have sent the graphical & raw data to Corby, if anybody else is
interested
> please advise me of your email address.
> 
> Regards,
> Bob Martinson, N1VQR



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