From: Richard (Rick) Karlquist [EMAIL PROTECTED]
Subject: Re: [time-nuts] Close-in phase noise measurements
Date: Sun, 30 Mar 2008 21:05:50 -0700
Message-ID: [EMAIL PROTECTED]
The relationship between phase noise and Allan variance is
a complex one and was described in papers at FCS in 1976
and frequency measurement
Subject: Re: [time-nuts] Close-in phase noise measurements
Shane wrote:
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can be pricey... $200K
Shane
Their calibration method
Richard (Rick) Karlquist wrote:
The relationship between phase noise and Allan variance is
a complex one and was described in papers at FCS in 1976
and 1978 by my previous manager Mike Fischer (then of HP).
I think these papers come closest to answering your question.
Rick Karlquist
Missing formula attached
bruce
inline: AVARCalc___
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of precise time and frequency measurement
Subject: Re: [time-nuts] Close-in phase noise measurements
Shane wrote:
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can be pricey... $200K
Shane
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need to get a grip on the
0.1-100Hz range, which is where most of my applications are.
What is the suggested measurement methodology for this
John Miles wrote:
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need to get a grip on the
0.1-100Hz range, which is where most of my applications are.
What is the suggested measurement
PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Close-in phase noise measurements
John Miles wrote:
I am continuing my phase noise measurement quest. I gathered
equipment (HP 8662a/11729C/8568B/multipliers) to measure
100Hz+ from the carrier. I now need
Shane wrote:
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can be pricey... $200K
Shane
Their calibration method is somewhat problematic at the low frequency
end where the effect of the PLL and the
: Tuesday, March 25, 2008 8:22 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Close-in phase noise measurements
Shane wrote:
Wenzel has a setup you can purchase at low cost.
http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
Phase noise test sets can
Most, but not all, sound cards have a low frequency cutoff of 20Hz or so.
Some (but not all) sound card ADCs can dc coupled.
A high resolution dc coupled ADC may be more effective for frequencies
below 20Hz.
True; I'm assuming that anyone using a sound card for these purposes is
either going
John Miles wrote:
Most, but not all, sound cards have a low frequency cutoff of 20Hz or so.
Some (but not all) sound card ADCs can dc coupled.
A high resolution dc coupled ADC may be more effective for frequencies
below 20Hz.
True; I'm assuming that anyone using a sound card for these
Shane wrote:
Do you know much about the RS FSUP50?
http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categ
ories/spectrum_analysis/FSUP-%7C-Key_Facts-%7C-4-%7C-966.html
Shane
Only whats specified on the datasheet.
Its performance appears to be several 10's of dB
Shane wrote:
Do you know much about the RS FSUP50?
http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categ
ories/spectrum_analysis/FSUP-%7C-Key_Facts-%7C-4-%7C-966.html
This is a nice but expensive equipment.
Nice: can do PN measurement by phase quadrature(where you
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