[time-nuts] Ronald Held's main question

Rob Kimberley rk at timing-consultants.com
Tue Dec 18 04:31:44 EST 2007


Excellent documents - a good recommendation Bill - I think I have some of
the originals ......must dust 'em down and have a read again.

Cheers

Rob Kimberley 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of WB6BNQ
Sent: 18 December 2007 07:39
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Ronald Held's main question

Hi Ronald,

Here are 3 Hewlett Packard appnotes that are in the same vain as the NBS 140
booklet.  In
many ways these HP items are better written.  The first one was written in
1961.  The
second one is an update (1974), as is the third (1976).  Each are different
and equally
worth having on the shelf.

http://cp.literature.agilent.com/litweb/pdf/5989-6171EN.pdf

http://cp.literature.agilent.com/litweb/pdf/5989-6183EN.pdf

http://cp.literature.agilent.com/litweb/pdf/5989-6247EN.pdf

Bill....WB6BNQ


WB6BNQ wrote:

> Hi Ronald,
>
> This list server is composed of three general classes of people.  Those
who 1) have
> just a passing interest in the subject, 2) those who delve into it on a
professional
> or amateur working level and 3) Some seriously warped individuals who far
exceed the
> distribution of what is considered normal (you know who you are!).
>
> Because of the above definition, the range of provided answers will cover
many view
> points.  Thus, you may  find the responses difficult to sort out for your
purposes.
>
> I may be wrong but am going to deduce from your last sentence, "If I can
get a signal
> inside or outside, what then ?", that you have had very little to no
exposure to the
> field of Time and Frequency Metrology.  In that regard, and to answer
your question,
> I highly suggest reading the following NIST publications.
>
> # 1. The first is a general history of NIST and its standards.  It is
noteworthy
> because it gives a sense of why we  are where we are today.
>
> http://tf.nist.gov/timefreq/general/pdf/1485.pdf
>
> # 2. The second one is a short paper that delves into the mechanics of
Time &
> Frequency measurement.  This  one will give you a basic understanding of
how it is
> done.  This paper is clearly part of a bigger  publication, although I
have not seen
> the whole publication.
>
> http://tf.nist.gov/timefreq/general/pdf/1498.pdf
>
> # 3.  This is the  - - -  BIBLE - - -  Strongly recommended
>
> This is a very large manual at more than 80 megabytes, but very well worth
the time
> to download it.  This NBS (NIST) publication, produced in 1974, should be
the defacto
> reading material for any starting class in Time & Frequency metrology.
Why some
> idealist at NIST lost their marbles and decided they should not make it
available on
> their WEB site is beyond me.
>
> Fortunately, it is available at the following Hawaii University site :
>
> http://digicoll.manoa.hawaii.edu/techreports/PDF/NBS140.pdf
>
> It seems that you have some need or want to make your computer more
accurate from a
> TIME point of view.  A number of approaches can be used for such an
undertaking.  If
> you are just looking to make you computer relatively accurate, a few
computer
> programs are available that will synchronize your computer to a recognized
NETWORK
> standard server.  This method may be all that you need and it requires no
local
> hardware and fussing with antennas and the like.
>
> Before spending money and physical effort that may not be necessary,
please read
> through the 3 above references to determine if you really want to get
involved to the
> level of additional hardware and expense.
>
> Bill....WB6BNQ
>
> Ronald Held wrote:
>
> > Since the moving option is out, perhaps I need to investigate whether
> > I currently can get any inside or outside signal. Is ther3=e an
> > inexpensive way given that I do not have any circuit assemble skills?
> > The complex will allow dishes as long as the are completely inside the
> > balcony(I speculate that it is at the behest of the local cable
> > company). I do not recall seeing any dishes on building in my complex.
> > If I can get a signal inside or outside, what then?
> >                                                Ronald
> >
>
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