[time-nuts] HP 5370B question
Robert E. Martinson
REMartinson at rcn.com
Sun Dec 23 06:24:51 UTC 2007
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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