Bob - With most counters, I have found that running them at slightly less than 10 MHz gives you an extra displayed digit of resolution. If the "1" out of 10 MHz were to be displayed, it would take up one more digit in the MSD position, leaving you one less in the LSD position. Since the numbers are so close anyway, if measuring for stability, I personally would prefer that extra digit in the LSD position. Regards - Mike
Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert E. Martinson Sent: Saturday, December 22, 2007 1:57 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] HP 5370B question 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 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of corby d dawson Sent: Wednesday, December 19, 2007 2:15 PM To: [email protected] Subject: [time-nuts] HP 5370B question Hi, Could a few of the 5370B owners connect the counters reference output to its counting input jack and with a 1 second gate let me know what the last 2 digits are doing? An earlier post implied that the last couple digits will wander around due to the way its designed. I'd like to know what a couple different counters show to see if that is indeed true! Thanks, Corby Dawson _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
