From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS receiver
Date: Mon, 19 Feb 2007 17:41:52 +1300
Message-ID: [EMAIL PROTECTED]
Magnus Danielson wrote:
http://tycho.usno.navy.mil/ptti/ptti99/PTTI_1999_405.PDF
Hej Magnus
Magnus Danielson wrote:
An interesting product originating from Mitel (Mike and Terry's
lawnmowers later became MITEL - according to their local rep about 20
odd years ago)
Hehe... yeah, I know it was in the Mitel days they started this. I even
beleive
that the GPS
From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS receiver
Date: Mon, 19 Feb 2007 23:39:47 +1300
Message-ID: [EMAIL PROTECTED]
Hej Magnus
Hej Bruce,
Fuller version is that the later Mitel founders worked for another
telecoms (Bell
Magnus Danielson wrote:
From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS receiver
Date: Mon, 19 Feb 2007 23:39:47 +1300
Message-ID: [EMAIL PROTECTED]
Hej Magnus
Hej Bruce,
Fuller version is that the later Mitel
Dr Bruce Griffiths wrote:
Hej Magnus
Mitel actually used to make PABX equipment about 20 years ago. They also
did specialised ICs for such applications.
Bruce
That's what I knew them for, we even had a Mitel PABX for a while where
I work. Did not know they were into GPS and never seen
of precise time and frequency measurement
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS receiver
Dr Bruce Griffiths wrote:
Hej Magnus
Mitel actually used to make PABX equipment about 20 years ago. They
also did specialised ICs for such applications.
Bruce
That's what I
).
--
Björn
:-)
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Didier Juges
Sent: 19 February 2007 12:42
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS
receiver
Two of those, with similar symptoms of bad sockets, otherwise similar
appearance, sold within an hour of each other, one for about $100 and
the other for $250.
I guess a number of people got pissed after missing on the first one?
eBay never ceases to amaze me!
Didier KO4BB
Most likely it went so high wa that someone spilled the beans on here !!
73, Dick, W1KSZ
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Didier Juges
Sent: Sunday, February 18, 2007 1:33 PM
To: !Time Nuts
Subject: [time-nuts] 5370B on eBay
Two of those
badly miscalibrated, but there didn't seem to be
much else wrong with it, if anything.
-- john, KE5FX
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Didier Juges
Sent: Sunday, February 18, 2007 1:33 PM
To: !Time Nuts
Subject: [time-nuts] 5370B on eBay
John,
One was sold by sierrametals (went for $250), the other by
electronicswest (went for $104)
I remember your posting but did not associate it with these items. I bid
on both, just in case since they were still at $20 an hour before close,
but I was not even close to final price, in either
Didier Juges wrote:
does not have an OCXO, I think.
I remember seeing a number of postings on time-nuts (must have been
Bruce) advocating the increased performance of carrier phase tracking,
but I need to educate myself about what it is and what good it can do
for me :-)
Any feedback
Didier Juges wrote:
On a different subject, I just won a Novatel Superstar 2 GPS receiver
advertised to do carrier phase tracking. It's specification lists a
timing accuracy of 50nS typical, which is not bad at all for a GPS that
does not have an OCXO, I think.
I remember seeing a number
Brooke Clarke wrote:
Hi Didier:
Many GPS receivers output carrier phase data but it's usually used in
post processing to get survey grade position accuracy. Since the code
phase position accuracy is larger than a wavelength the receiver does
not know how many integer wavelengths to add.
Brooke,
I read about the uncertainty of absolute position because the carrier
phase data has no absolute reference, but that still gives a very
precise relative position (and speed) information.
The point is that for timing, absolute position information is probably
unnecessary. The benefit
Hi Bruce:
Is there a paper describing the method?
Have Fun,
Brooke Clarke
Have Fun,
Brooke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Dr Bruce Griffiths wrote:
Brooke Clarke wrote:
Hi Didier:
Many GPS
Brooke Clarke wrote:
Hi Bruce:
Is there a paper describing the method?
Have Fun,
Brooke Clarke
Have Fun,
Brooke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Dr Bruce Griffiths wrote:
Brooke
Yes I
From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] 5370B on eBay, carrier phase tracking GPS receiver
Date: Mon, 19 Feb 2007 16:53:55 +1300
Message-ID: [EMAIL PROTECTED]
Brooke Clarke wrote:
Hi Bruce:
Is there a paper describing the method?
Have Fun,
Brooke Clarke
Magnus Danielson wrote:
http://tycho.usno.navy.mil/ptti/ptti99/PTTI_1999_405.PDF
There is another paper just before it. There is also a patent for a
specific
form of implementation.
Note they used an Oncore VP, the Superstar has a better carrier phase
tracking.performance.
Just spotted this. No bids starting at $199
http://cgi.ebay.com/C18418-HP-5370B-Universal-Time-Interval-Counter_W0QQitemZ7534725187QQcategoryZ25401QQrdZ1QQcmdZViewItem
--
David Kirkby,
G8WRB
Please check out http://www.g8wrb.org/
of if you live in Essex
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