Cc: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sunday, October 21, 2012 9:27 PM
Subject: Re: [time-nuts] GPSDO three cornered comparisons
Tom,
This is true for the phase data and calculating short term stability, but not
necessarily for measuring the tempco
Hi All,
I have an HP 58503A and a Symmetricom 58503B which are behaving quite
differently to one another using a common antenna. Using Z38xx, there's
almost an order of magnitude difference between the reported ADEVs at
40k seconds (HP:7e-13, Sym:5e-12). Both have 10811 oscillators and are
It would be interesting to switch the A and B oscillators. The 10811 spec can
vary widely.
Thomas Knox
Date: Mon, 22 Oct 2012 07:21:08 +1000
From: dho...@gmail.com
To: time-nuts@febo.com
Subject: [time-nuts] GPSDO three cornered comparisons
Hi All,
I have an HP 58503A
I have an HP 58503A and a Symmetricom 58503B which are behaving quite
differently to one another using a common antenna. Using Z38xx, there's
almost an order of magnitude difference between the reported ADEVs at
40k seconds (HP:7e-13, Sym:5e-12). Both have 10811 oscillators and are
Where
Instead of Stable32, try Ulrich Bangerts plotter tool, it has a host of
stability analysis built in and is easier to use than Stable32 in my opinion.
Its also free.
Bye
Said
Sent From iPhone
On Oct 21, 2012, at 14:21, David Hooke dho...@gmail.com wrote:
Hi All,
I have an HP 58503A and a
Tom,
The ADEVs I quoted are from the Z83xx software, so I assume it's
comparing time from the GPS system to it's own oscillator's output, in
the same way that LH does. I've been monitoring the basic stuff you
suggested.
It's because I don't have a known reference to compare the units with
: David Hooke dho...@gmail.com
To: time-nuts@febo.com
Sent: Sunday, October 21, 2012 4:44 PM
Subject: Re: [time-nuts] GPSDO three cornered comparisons
Tom,
The ADEVs I quoted are from the Z83xx software, so I assume it's
comparing time from the GPS system to it's own oscillator's output
, or shall I explain more?
Or, if you have some raw data you can send me off-line I'll take a look at it.
Thanks,
/tvb
- Original Message -
From: David Hooke dho...@gmail.com
To: time-nuts@febo.com
Sent: Sunday, October 21, 2012 4:44 PM
Subject: Re: [time-nuts] GPSDO three cornered
- Original Message -
From: David Hooke dho...@gmail.com
To: time-nuts@febo.com
Sent: Sunday, October 21, 2012 4:44 PM
Subject: Re: [time-nuts] GPSDO three cornered comparisons
Tom,
The ADEVs I quoted are from the Z83xx software, so I assume it's
comparing time from the GPS system