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Gentlemen,
Using oscilloscopes to measure relative phase has been widely
used for a long time. The setup appears in many H-P Op/Srv
manuals in the adjustment procedure section to calibrate the
instrument timebase to a shop
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From: Pete [EMAIL PROTECTED]
Subject: Re: [time-nuts] Setting Rubidium to match GPS source
Date: Fri, 28 Sep 2007 09:07:29 -0600
Message-ID: [EMAIL PROTECTED]
Pete,
Using oscilloscopes to measure relative phase has been
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Another question, has anyone here used an HP 3575A Gain Phase Meter
(1Hz - 13MHz) to set their Rubidium to match the GPS sourced 10 MHz
clock? Would that method be more accurate to line the Rubidium up
than using a 12
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Hi Pete,
Please send me details off list, and please take no notice of know it alls
who berate anything that doesn't meet their level of electronic
understanding! Actually I find negative comments and put downs like that
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CHazlitt wrote:
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Hello again,
Another question, has anyone here used an HP 3575A Gain Phase Meter (1Hz -
13MHz) to set their Rubidium to match the
In a message dated 9/28/2007 02:07:08 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
In this context, how stable is a GPSDO? If I used a Cesium for the sync
input, how much fuzz would I see on a GPSDO output if I watched it wander
back and forth for a day?
Hi HMurray,
depends on
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In a message dated 9/28/2007 02:07:08 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
In this context, how stable is a GPSDO? If I used a Cesium for the sync
input, how much fuzz would I see on a GPSDO output if I
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Hi SAID,
I am interested about this OEM PCB with external OCXO, due to the reason I have
3 HP OCXO 10811 and the other one, so please put me on the waiting list.
Many thanks and best regards,
Ernie. HG5ED
In a message dated 9/28/2007 14:13:34 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
I am interested about this OEM PCB with external OCXO, due to the reason I
have 3 HP OCXO 10811 and the other one, so please put me on the waiting list.
Hi Ernie,
no problem, 10811's are great.
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[EMAIL PROTECTED] wrote:
Hi HMurray,
depends on the GPSDO. On the Fury for example you can expect the unit to
wander less than +-15ns back and forth over a period of 1 Day. That's a
deviation of about 3.5E-013 or so
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Put me on the list. I'm interested in using it with LPRO-101 units.
Scott
[EMAIL PROTECTED] wrote:
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In a message dated 9/28/2007 02:07:08
In a message dated 9/28/2007 16:14:00 Pacific Daylight Time, [EMAIL PROTECTED]
writes:
Put me on the list. I'm interested in using it with LPRO-101 units.
Scott
Got it Scott,
bye,
Said
** See what's new at http://www.aol.com
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In a message dated 9/28/2007 16:02:30 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Surely a height error of 2m leads to a timing error of about 6.6ns for a
particular SV when that SV is directly overhead.
When the SV
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[EMAIL PROTECTED] wrote:
In a message dated 9/28/2007 16:02:30 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Surely a height error of 2m leads to a timing error of about 6.6ns for a
particular SV when that SV is
Our EFC output is 0V to 5V, so you can set the 10811 with the
mechanical adjust to have a nominal voltage of 2.5V, I did that to
one of my 10811's, works perfectly.
If an OCXO needs -5V to 5V (some Wenzels need that for example) then
a simple external Opamp circuit can shift the range from
Submitted for general discussion: I have a need to divide a low-noise 80-MHz
clock by two, twice, to obtain 40 MHz and 20 MHz outputs, and my current
thinking is that the quietest way to do this is with a pair of cascaded
regenerative dividers. Does anyone have any 'favorite' papers or
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In a message dated 9/28/2007 17:28:22 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
symmetric about the actual propagation delay, so in this case quoting
the propagation delay error range perhaps imparts a pessimistic
John Miles wrote:
Submitted for general discussion: I have a need to divide a low-noise 80-MHz
clock by two, twice, to obtain 40 MHz and 20 MHz outputs, and my current
thinking is that the quietest way to do this is with a pair of cascaded
regenerative dividers. Does anyone have any
You can do better than that, a single regenerative divider can be
configured to divide by 4.
A pair of parallel feedback paths (with amplifiers), one tuned to F/4
and the other to 3F/4 are best.
NIST did some work (together with Indian collaborators) on this type of
generalised regenerative
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From: John Miles [EMAIL PROTECTED]
Subject: Re: [time-nuts] Basic regenerative-divider questions
Date: Fri, 28 Sep 2007 18:51:58 -0700
Message-ID: [EMAIL PROTECTED]
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Bruce Griffiths wrote:
Magnus Danielson wrote:
The article in question is...
http://tf.nist.gov/timefreq/general/pdf/1890.pdf
but also
http://tf.nist.gov/timefreq/general/pdf/1800.pdf
See for yourself.
Cheers,
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John Miles wrote:
Thanks much, Bruce. I suspected either you or Enrico R. would have some
knowledge of that.
Note that I need to end up with 40 *and* 20 MHz, hence the plan to cascade
two /2 dividers. If there is a
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What's the crystal for?
Crystal filters aren't usually necessary
The nature of the filter(s) is one of the questions that I'm hoping those
papers will help answer. I was guessing that a crystal filter would make
the
Hi,
I had a request for photos of the Lucent RFG-XO unit with the 10 MHz Efratom
TCXO in it.
The photos can be viewed at:
This URL: http://imageevent.com/qdf_files/rfgxo/rfgx
Chris KL7FB
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