John Miles wrote:
That NIST box looks very nice but I have no idea what it does. If it's just
a quadrature PLL and collection of filters, that can be done for a lot less
than $4000. If it's got features like an ensemble of built-in reference
oscillators, then $4000 could be a bargain.
--
On Mon, 17 Aug 2009 23:18:58 +1200, you wrote:
1) Use 3 sources, S1, S2 and X.
2) Phase lock S1 in quadrature to X using a diode double balanced mixer
using a low bandwidth PLL.
3) Phase lock S2 in quadrature to X using a diode double balanced mixer
using a low bandwidth PLL.
Then for
Gerhard Hoffmann wrote:
On Mon, 17 Aug 2009 23:18:58 +1200, you wrote:
1) Use 3 sources, S1, S2 and X.
2) Phase lock S1 in quadrature to X using a diode double balanced mixer
using a low bandwidth PLL.
3) Phase lock S2 in quadrature to X using a diode double balanced mixer
using a
2009/8/17 Bruce Griffiths bruce.griffi...@xtra.co.nz:
iov...@inwind.it wrote:
Please, how do time-nuts measure phase noise? What may be a minimal setup
whit recording capability?
Thanks,
Antonio I8IOV
A minimal setup for the classical method requires 2 frequency sources at
the same
Steve Rooke wrote:
2009/8/17 Bruce Griffiths bruce.griffi...@xtra.co.nz:
iov...@inwind.it wrote:
Please, how do time-nuts measure phase noise? What may be a minimal setup
whit recording capability?
Thanks,
Antonio I8IOV
A minimal setup for the classical method requires
On Mon, 17 Aug 2009 23:18:58 +1200 Bruce Griffiths wrote:
Steve Rooke wrote:
2009/8/17 Bruce Griffiths bruce.griffi...@xtra.co.nz:
iov...@inwind.it wrote:
Please, how do time-nuts measure phase noise? What may be a minimal setup
whit recording capability?
Thanks,
Antonio
iov...@inwind.it wrote:
On Mon, 17 Aug 2009 23:18:58 +1200 Bruce Griffiths wrote:
Steve Rooke wrote:
2009/8/17 Bruce Griffiths bruce.griffi...@xtra.co.nz:
iov...@inwind.it wrote:
Please, how do time-nuts measure phase noise? What may be a minimal setup
nut stuff.
ws
*
- Original Message -
From: iov...@inwind.it
To: time-nuts time-nuts@febo.com
Sent: Monday, August 17, 2009 4:51 AM
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
On Mon, 17 Aug 2009 23:18:58 +1200 Bruce Griffiths wrote:
iov
: Monday, August 17, 2009 7:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
Some have commercial phase noise measurement systems like Symmetricoms
5115A, 5120A. 5125A. Some have older HP phase noise measurement systems like
In order to simplify the project, and given that I wouldn't need to distinguish
what source the noise comes from, I could use only S1 and X sources. And here
is
my last question. If I don't lock the sources to one another (say two HP
10811),
what is the unconvenience? An additional signal in
The mixer output is only sensitive to phase differences for small
deviations about 90 degrees phase difference between the 2 sources.
With unlocked sources AM noise also affects mixer output.
In order to measure phase noise without phase locking you need something
like a COSTAS receiver or
: Monday, August 17, 2009 7:22 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
Can anyone provide any information on the usefulness of the Phase Noise
Utility program (85671A) for the HP 8560 series Spectrum Analyzers
. Trantham
To: 'Discussion of precise time and frequency measurement'
Sent: Monday, August 17, 2009 9:22 AM
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
Can anyone provide any information on the usefulness of the Phase Noise
Utility program (85671A) for the HP 8560
Joe,
I have the 8560E analyzer with the 85671A utility. I find the
utility to be fairly slow in taking the numerous measurements and
processing the results. The PN program from KE5FX EZGPIB does
this in about 1/4 the time and has more post processing display
options. You do need a
measurement
Sent: Monday, August 17, 2009 2:39 PM
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
Joe,
I have the 8560E analyzer with the 85671A utility. I find the
utility to be fairly slow in taking the numerous measurements and
processing the results. The PN
...@febo.com] On
Behalf Of Bruce Griffiths
Sent: Monday, August 17, 2009 11:24 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] How do time-nuts measure phase noise?
The mixer output is only sensitive to phase differences for small
deviations about 90 degrees phase
I used that software for many years with my 8563e and a PCMCIA GPIB card.
Then John's PN program came along and I havent ran it since
Dave
-
Message: 5
Date: Mon, 17 Aug 2009 09:22:18 -0500
From: J. L. Trantham jlt...@worldnet.att.net
Subject: Re: [time-nuts] How do time
Please, how do time-nuts measure phase noise? What may be a minimal setup whit
recording capability?
Thanks,
Antonio I8IOV
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iov...@inwind.it wrote:
Please, how do time-nuts measure phase noise? What may be a minimal setup
whit recording capability?
Thanks,
Antonio I8IOV
A minimal setup for the classical method requires 2 frequency sources at
the same frequency one of which can be phase locked in quadrature
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