In a message dated 7/16/2007 22:26:14 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
I have a military OCXO sample (new product) that is supposed to be
g-insensitive and even that one has about E-09 frequency shift per 90
degrees tilt.
... and you have not put a GPS diciplining
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I guess that is why some GPS antenna cables is temperature-stabilized as well
as the cement-pidestal for the GPS antenna as it stands on solid rock. The
same
place have controlled environment for the cesiums and hydrogens,
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Yes it can make sense.
Place one Cs clock in a chamber where the ambient temperature can be
adjusted to various fixed temperatures. Compare the phase of its
5/10MHz and/or PPS outputs with respect to those of another Cs
In the article OBSERVATIONS ON STABILITY MEASUREMENTS
OF COMMERCIAL ATOMIC CLOCKS, Pekka Eskelinen claims to
have measured a phase temperature coefficient of 100ns/degree
for commercial Cs clocks in 1999.
Something is wrong with that claim. There's no way a modern
cesium standard exhibits a
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From: Tom Van Baak [EMAIL PROTECTED]
Subject: Re: [time-nuts] Cs stability
Date: Tue, 17 Jul 2007 00:21:37 -0700
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I guess that is why
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From: Tom Van Baak [EMAIL PROTECTED]
Subject: Re: [time-nuts] Cs stability
Date: Tue, 17 Jul 2007 00:40:49 -0700
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In the article
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I'm not sure I follow this. Yes, you will see a phase shift but how
can you tell how much of said shift is due to a fixed phase shift (as
if it were cable phase tempco) vs. how much is due to phase shift due
to frequency offset
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Hi Peter,
Do you like the way the NIST page looks now?
http://tf.nist.gov/general/enc-re.htm#resonancefrequency
http://tf.nist.gov/general/enc-re.htm#rubidiumoscillator
/tvb
Thank you all for your replies. It still begs the
Or see a failed TIC test which actually displayed the delay in a piece of
coax showing the temperature in the room as the air conditioning was turning
on and off over night.
http://www.ko4bb.com/Test_Equipment/data/HP5370A coax cable delay.png
I did not calibrate this thermometer though :-)
Achieved: Acceleration sensitivities better than 2E-12/g
http://www.zyfer.com/briefings/telecom/qz%20low-g%20brfg%20olie%204-04.pdf
--
Björn
On Tue, July 17, 2007 14:40, Rob Kimberley said:
Another way that has been incorporated successfully to combat g
sensitivity
are accelerometers
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I guess I'm a bit out of date!
:-)
Rob
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Björn Gabrielsson
Sent: 17 July 2007 14:13
To: Discussion of precise time and frequency measurement
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From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] Cs stability
Date: Tue, 17 Jul 2007 21:30:03 +1200
Message-ID: [EMAIL PROTECTED]
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Tom Van Baak
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In message: [EMAIL PROTECTED]
Tom Van Baak [EMAIL PROTECTED] writes:
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:
: In the article OBSERVATIONS ON STABILITY MEASUREMENTS
: OF COMMERCIAL ATOMIC
Greg Burnett hit the nail on the head. It is a
machined base with four solenoids. I'm a bit hesitant
to start taking screws out of it as I'm not sure what
holds what together... Though if it is dead, what
additional harm can I do...
Any waym the assembly seems to have an HP part number
of 1979a
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In case anyone still doesn't know who I am, I need to
mention that I designed the RF electronics in the
5071A in an earlier life, circa 1990.
Now that we have that out of the way, I will agree
with Magnus that the cited paper is
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From: Richard \(Rick\) Karlquist [EMAIL PROTECTED]
Subject: Re: [time-nuts] Cs stability
Date: Tue, 17 Jul 2007 09:52:22 -0700
Message-ID: [EMAIL PROTECTED]
Rick,
In case anyone still doesn't know who I am, I need to
mention that
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Hello Tom,
I'd not had a reply from NIST, so was about to write to a
contact there. Have they just quietly done it, or did you nudge
someone? Anyway, yes, thank you, the table gives the 610.904 figure
from the French
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Hi All
I'm trying to set up a supposedly NOS GPS development kit, similar to the
old Motorola evalution kit, with an Oncore VP mounted on an interface board
fitted with a 5 volt regulator and MAX232 interface chip.
Running
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On Tue, 17 Jul 2007 08:42:56 -0700 (PDT), Tom Clifton [EMAIL PROTECTED]
wrote:
Greg Burnett hit the nail on the head. It is a
machined base with four solenoids. I'm a bit hesitant
to start taking screws out of it as I'm not sure
From: Peter Vince [EMAIL PROTECTED]
Subject: Re: [time-nuts] Exact Rubidium frequency
Date: Tue, 17 Jul 2007 19:45:08 +0100
Message-ID: [EMAIL PROTECTED]
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Hello Tom,
I'd not had a reply from NIST, so was about to write
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In a message dated 17/07/2007 23:09:36 GMT Daylight Time,
[EMAIL PROTECTED] writes:
You should be able to restart the VP with the @@Cg command in the
Additional Message Window in WinOncore12. The total command string is:
Hi guys,
I have a nice old Dixie tube HP5532A counter to give away that I picked up
at a local recycling store. It powers up, and I can coax it to count. It needs
a little cleaning, and some love. I figure someone collecting these would
have good use for it.
The first responder to this
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In a message dated 7/17/2007 18:32:51 Pacific Daylight Time, [EMAIL PROTECTED]
writes:
An old neon tube display for those South of the Mason-Dixon line?
(vs. Nixie tube for those North.)
Sorry, couldn't resist.
As you can
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On Tue, 17 Jul 2007 21:47:30 EDT, [EMAIL PROTECTED] wrote:
In a message dated 7/17/2007 18:32:51 Pacific Daylight Time, [EMAIL PROTECTED]
writes:
An old neon tube display for those South of the Mason-Dixon line?
(vs. Nixie
From: Rex [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP5532A for free
Date: Tue, 17 Jul 2007 18:33:18 -0700
Message-ID: [EMAIL PROTECTED]
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On Tue, 17 Jul 2007 21:19:40 EDT, [EMAIL PROTECTED] wrote:
Dixie tube
An old neon
List member (presumably an unmarried one)?
http://farm1.static.flickr.com/70/188117595_213c635851.jpg?v=0
-- john, KE5FX
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of [EMAIL PROTECTED]
Sent: Tuesday, July 17, 2007 7:15 PM
To: time-nuts@febo.com
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From: [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP5532A for free
Date: Tue, 17 Jul 2007 22:20:32 EDT
Message-ID: [EMAIL PROTECTED]
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In a message dated 7/17/2007
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I have a nice old Dixie tube HP5532A counter to give away that I picked
up
at a local recycling store. It powers up, and I can coax it to count.
It needs
a little cleaning, and some love. I figure someone collecting these
would
In a message dated 7/17/2007 20:37:33 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
(Which store??)
I'm interested. I'm in Los Gatos (Pollard Road). I can pick it up, but
only through Friday of these week.
List member (presumably an unmarried one)?
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