To: Bob Stewart ; Discussion of precise time and frequency
measurement
Sent: Saturday, March 4, 2017 7:14 PM
Subject: Re: [time-nuts] Cs standard stability
BobYou should to use the same measurement bandwidth when comparing ADEV
measures.The measurement bandwidth of a Timepod is usually
precise time and frequency
measurement
Sent: Saturday, March 4, 2017 6:03 PM
Subject: Re: [time-nuts] Cs standard stability
BobWe are certainly not off track.The phase noise of the GPSDO affects the
trigger jitter of both the 5370A and the jitter of the GPSDO PPS output and
consequently
DO. Also, the ADEV of the GPSDO pretty much tracks
> > what is to be expected when run on a good 5370, isn't it?
> >
> > Bob
> >
> >
> >
> > -
> > From: Bruce Griffiths
> > To: Bob Stewart ; Discussion
tracks what is to be expected
when run on a good 5370, isn't it?
Bob
From: Bruce Griffiths
To: Bob Stewart ; Discussion of precise time and frequency
measurement
Sent: Saturday, March 4, 2017 5:22 PM
Subject: Re: [time-nuts] Cs standard stability
BobThe Phase noise of that
s
> To: Bob Stewart ; Discussion of precise time and
> frequency measurement
> Sent: Saturday, March 4, 2017 5:22 PM
> Subject: Re: [time-nuts] Cs standard stability
>
> Bob
> The Phase noise of that GPDSO seems quite high and some form of filtering
>
t of my reach.
Bob
From: Bruce Griffiths
To: Bob Stewart ; Discussion of precise time and frequency
measurement
Sent: Saturday, March 4, 2017 4:28 PM
Subject: Re: [time-nuts] Cs standard stability
Bob
Your reasoning appears somewhat circular.
A typical 5370A may have around 35ps o
From: Bruce Griffiths
> To: Bob Stewart ; Discussion of precise time and
> frequency measurement
> Sent: Saturday, March 4, 2017 4:28 PM
> Subject: Re: [time-nuts] Cs standard stability
>
> Bob
>
> Your reasoning appears somewhat circular.
>
e, I don't know anything more than that. Correct?
>
> Bob
>
>
> From: Bruce Griffiths
> To: Bob Stewart ; Discussion of precise time and frequency
> measurement
> Sent: Saturday, March 4, 2017 3:44 AM
> Subject: Re: [time-nuts] Cs standard stability
&
e, I don't know anything more than that. Correct?
Bob
From: Bruce Griffiths
To: Bob Stewart ; Discussion of precise time and frequency
measurement
Sent: Saturday, March 4, 2017 3:44 AM
Subject: Re: [time-nuts] Cs standard stability
Bob
That doesn't seem inconsistent
Bob
That doesn't seem inconsistent with the specs given the contribution of the
5370A to the measured ADEV is likely to be of the same order as the PRS45A
spec. The ADEV of the GPSDO also needs to be taken into account. The
contribution of the 5370A to ADEV will gradually become insignificant c
I hooked up my PRS-45A yesterday, just to do some ADEV comparisons with my
GPSDO. Unfortunately, the GPSDO seems to be better by almost two points at all
tau as measured on my HP 5370A and plotted by Timelab. So, can I infer from
that that the OCXO in the PRS has a problem, or could it be some
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