Mark, The 5335 is specified at 9 digits/second of resolution, the 5370 is specified at 12 digits/second.
That's 3 orders of magnitude better resolution. That brings up noise that at 9d/s is simply negligible. My two 5370s are rock stable if I only look at the 9 left-most digits. While it would be nice to have the same stability at 12d/s on the 5370 as we get on the 5335 at 9d/s, that simply does not happen. Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of marks twotoe.com > Sent: Friday, May 09, 2008 5:53 PM > To: [email protected] > Subject: Re: [time-nuts] HP 5370B > > Thanks Chuck, > > > I found FEBO has an article on the 5370B here > http://www.febo.com/time-freq/hardware/5370B/index.html > > As a footnote, my 5335A is rock stable sitting on 10 Mhz all day. > > > Best regards, > Mark > > > > > Date: Fri, 09 May 2008 10:28:00 -0400 > > From: Chuck Harris <[EMAIL PROTECTED]> > > Subject: Re: [time-nuts] HP 5370B > > To: Discussion of precise time and frequency measurement > > <[email protected]> > > Message-ID: <[EMAIL PROTECTED]> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > > That is normal for 5370 type counters. The are time > interval counters > > that can also measure frequency. Frequency is not their > best feature. > > > > -Chuck Harris > > > > marks twotoe.com wrote: > >> Could someone confirm if this behaviour is normal on a 5370B. > >> > >> When measuring the output of my standard the 10th and 11th > digits are > >> constantly changing. > >> > >> Do I need a 10Mhz low pass filter on the input of the > counter to get > >> an accurate result or should I just ignore this behaviour? > >> > >> > >> Many thnaks, > >> Mark > >> > > > > > _______________________________________________ > 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. > > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.519 / Virus Database: 269.23.11/1422 - Release > Date: 5/8/2008 5:24 PM > > No virus found in this outgoing message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.23.11/1422 - Release Date: 5/8/2008 5:24 PM _______________________________________________ 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.
