Hello Time Nuts,
Tuesday, January 22, 2019
The Ublox M8T is now fixed! For future reference this is what was
wrong. CSG Shop ship various versions of this GPS module on a generic
board, as far as I can tell, and reading between the lines. Some
versions need this jumper across two of the thre
Let's not forget dymec.For the younger crowd, write 'dymec' on a piece of paper
and then look at it upside down, just the first two letters.John K0GCJ
-- Original Message --
From: Bob via time-nuts
To: time-nuts@lists.febo.com
Cc: millerk...@aol.com
Subject: Re: [time-nuts] HP
Fellow time-nuts,
While we often look at long-term stability, ADEV etc. we consider
oscillators in their free-running properties. This is all fine and dany,
but when we want to use an oscillator as a clean-up oscillator, the
servo-loop with surpress much of the low-frequency/high-tau propertie
And by gosh I have a dymec 60 KHz receiver that still works. I restored it.
Those were back in the real timing days with npl wwvb and others. None of
these satellite things. Chuckle
By the use of the clever label they could cover both product lines. HP and
Dymec.
Regards
Paul
WB8TSL
On Wed, Jan 23
Hi John:
Like this:
dymec logo is "hp" turned upside down
--
Have Fun,
Brooke Clarke, N6GCE
https://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how
well you understand how it works.
2. Every
Hi
If you take a look at typical TCXO’s and XO’s in a real world environment,
their noise is higher than a similar
OCXO even at 100 Hz. If you are cleaning up something like a Rb, your loop may
well be below 1Hz.
Like everything else, it becomes a “that depends” sort of thing. If your
cleanu
In message , Magnus Danielson
writes:
>Consider for instance that we have a LPRO rubidium and we want to use a
>clean-up oscillator to provide better phase-noise, what would be a good
>selection?
There are special devices for this, like Vectrons TRU-50, but they
are hard to get hold o
I'm using a Wenzel Phase Lock Oscillator as a "clean up" oscillator for my
Bodnar GPSDO. I lack the capability to measure if it really can do as they
advertise, but the 1 kHz away phase noise is claimed to be in the -170
dBc/Hz range. The ADC noise floor keeps me from measuring anywhere near
that l
Hi,
It doesn't look like the F9P does anything special for timing - the
timing specs given in the F9T spec sheet are 5 ns (1-sigma, clear sky,
absolute mode) and +/- 4ns jitter, but for the F9P are 30ns RMS and
60ns for 99%.
I think I want an F9T :)
Angus.
On Mon, 21 Jan 2019 09:00:33 -0500, yo
Hello Time Nuts,
Being a bit new to HP (only 35 years), I never head of Dymec before. A quick
Google search yielded this link, which is an excerpt from the book "Becoming
Hewlett Packard, Why Strategic Leadership Matters." You can read about 10
pages of the book from the preview, which ta
> Being a bit new to HP (only 35 years), I never head of Dymec before.
This web page gives the best coverage of Dymec that I've seen:
http://hpmemoryproject.org/news/dymec/dymec_page_00.htm
You'll recognize much of that era's test equipment.
Also near the end are many photos showing the dy upsid
On 1/23/19 7:02 PM, Tom Van Baak wrote:
Being a bit new to HP (only 35 years), I never head of Dymec before.
This web page gives the best coverage of Dymec that I've seen:
http://hpmemoryproject.org/news/dymec/dymec_page_00.htm
Y
fascinating stuff - I'll have to ask some of the older JPLer
On 1/23/19 12:43 PM, Magnus Danielson wrote:
Fellow time-nuts,
While we often look at long-term stability, ADEV etc. we consider
oscillators in their free-running properties. This is all fine and dany,
but when we want to use an oscillator as a clean-up oscillator, the
servo-loop with surpres
Speaking of books about HP, I highly recommend "Bill and Dave: How Hewlett and
Packard Built the Worlds Greatest Company". It covers the history of HP
including the development of many of the landmark pieces of test equipment, the
HP business model, and the company expansion from the garage to
Hi:
I'm pondering ways I can use my collection of time interval counters (most of
which also have frequency counter modes) to measure the frequency of signals at
frequencies up to 1.3 GHz. None these units will deal with frequencies higher
than 512 MHz.
Does anyone have any suggestions for
On 1/23/2019 7:59 PM, jimlux wrote:
My idea was to get an OCXO without the oven (or with the oven disabled)
- the idea was that an OCXO will have high Q for good phase noise, and I
can deal with the frequency shift due to frequency and aging in the long
term in other ways
As it happens, i
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