[time-nuts] LF power supply noise

Mike Monett xde-l2g3 at myamail.com
Wed Jun 24 08:50:38 EDT 2009


  > Mike Monett skrev:

  >> Way to go Magnus. I'll check things a bit more carefully now.

  > Not blame,  you  are  making a chicken  out  of  the  feather... a
  > mistyping can  occur,  I  was  just  wondering  why  you  where so
  > consistent about it.

  Copy & paste. Saves time and usually eliminates typos. But  I should
  have checked more carefully, and will do so in the future.

  > BTW, as for the HP appnote, you got the wrong one. I  was refering
  > to one written for HP 5371A and/or HP5372A and not the HP 5370A/B.

  > I think  it is in the App note 358 series. Regardless, I  have not
  > spent quality time over it as it does not address issues  which is
  > particular useful  for me as I don't do disc drives and  rarely to
  > those low rates of bitstreams.

  > Cheers,
  > Magnus

  The HP museum shows the following list for the 358 series (sorry for
  the wrap)

  358-1  1987	5371A	Characterization of Frequency-Agile Signal Sources
  358-2  1987	5371A	Jitter and Wander Analysis in Digital Communications
  358-3  1988	5371A	Time Domain Characterization of Magnetic Disk Drives
  358-4  1989	5372A	Pre-Trigger Simplifies VCO Step Response Measurements
  358-5  1989	5372A	Clock Rate Independent Jitter Measurements for Digital
Communications Systems
  358-5  1990	5372A	French Translation of AN 358-5
  358-6  1989	5372A	Characterizing Transient Timing Errors in Disk and Tape
Drives
  358-7  1989	5372A	Analysing Phase-Locked Loop Transients in the
Modulation Domain
  358-8  1989	5372A	Single Shot BPSK Signal Characterization
  358-9  1989	5372A	Modulation Domain Techniques for Measuring Complex
Radar Signals
  358-9  1991	5372A	French Translation of AN 358-9
  358-10 1989	5372A	Characterizing Baker Coded Modulation in Radar Systems
  358-11 1989	5372A	Characterizing Shirp Coded Modulation in Radar Systems
  358-12 1990	5371A-5372A	French Translation of AN 358-12
  358-13 1990	5372A	Analysing Phase-Locked Loop Capture and Tracking Range

  http://www.hpmemory.org/ressources/resrc_an_01.htm

  It looks  like AN358-3 is the one you are referring to.  However, it
  is not listed on the Agilent site:

  5372A Frequency and Time Interval Analyzer

  1-12 of 12

  Title/Description	Date	Type

  PDF 667 KB 	Analyzing Phase-Locked Loop Capture and Tracking Range (AN
358-13)
  PDF 658 KB 	Analyzing Phase-Locked Loop Transients in the Modulation
Domain (AN 358-7)
  PDF 721 KB 	Characterizing Barker Coded Modulation in Radar Systems (AN
358-10)
  PDF 647 KB 	Characterizing Chirp Coded Modulation in Radar Systems (AN
358-11)
  PDF 634 KB 	Clock Rate Independent Jitter Measurements for Digital
Communications Systems (AN 358-5)
  PDF 4.29 MB 	Frequency and Time Standards (AN 52)
  PDF 15.4 MB 	Fundamentals of Time and Frequency Standards (AN 52-1)
  PDF 897 KB 	Fundamentals of Time Interval Measurements (AN 200-3)
  PDF 713 KB 	Modulation Domain Techniques for Measuring Complex Radar
Singals (AN 358-9)
  PDF 1.33 MB 	Simplify Frequency Stability Measurements with Built-in
Allan Variance Analysis (AN 358-12)
  PDF 943 KB 	Single Shot BPSK Signal Characterization (AN 358-5)
  PDF 11.9 MB 	Timekeeping and Frequency Calibration (AN 52-2)

 
<http://www.home.agilent.com:80/agilent/techSupport.jspx?pid=1000001410%3Aepsg%3Apro&pageMode=AN&cc=US&lc=eng>

  and it does not show up in google.

  However, in  order to do Phase Margin Analysis as  described  in the
  Katz paper, you must have access to signals that are internal to the
  phase detector.  They  are not accessible in the hard  disk,  so the
  only signals  that could be used for the HP 5372 are the  same clock
  and data signals that were used in AN 191-7:

  http://cp.literature.agilent.com/litweb/pdf/5952-7908.pdf

  Since the  same  signals are used, the resulting plots  will  be the
  same. As  I described previously, they are useless for  any  kind of
  analytical measurements of the performance of the disk drive.

  Regards,

  Mike




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