Here are my $0.02... Magnus Danielson wrote: > From: Dr Bruce Griffiths <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] How to measure Allan Deviation? > Date: Tue, 24 Oct 2006 10:52:21 +1300 > Message-ID: <[EMAIL PROTECTED]> > > >> Tom >> > > Hi Bruce, > > >> In comparing 2 oscillators do you mean >> >> 1) Connecting one oscillator to the FREQ STD input at the rear of the >> 5370A, selecting the external timebase and connecting the other >> oscillator to the Front panel FREQ/PERIOD input and then selecting >> frequency measurement which in effect gives the frequency ratio of the 2 >> oscillators? >> > > I have advocated this approach, but nobody seemed to care. > > HP says in the 5316B manual (probably in other manuals, but that's where I saw it first), that it is best to compare 2 oscillators by plugging them in START and STOP respectively, but NOT to use one as a standard, because averaging works better (or simply, works) when the internal standard is async with either START or STOP signals. > Cheers, > Magnus >
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