Hi all, I'm new here (been reading for a while, but this is my first reply) so
sorry if I'm not doing this reply thing right. There is a Spirent simulator
down the hall from me that I tested the output PPS on a few months ago using an
Agilent 53230A (OCXO option). While I don't remember the
-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Lux
Sent: Wednesday, October 31, 2012 8:39 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] GPS receiver testing
Hello Said,
I'm familiar with your postings on the Time Nuts list, so I thought I'd
ask your advice
John,
thanks for your email, I am replying to Time Nuts as well as there is a lot
of knowledgeable folks here that can help.
In terms of a GPSDO tutorial, take a look at the HP papers linked on the
JLT website under the Links Of Interest and Related Whitepaper sections:
Thank you very much for the thorough reply.
Best Regards,
John
From: saidj...@aol.com [mailto:saidj...@aol.com]
Sent: Wednesday, October 31, 2012 3:17 PM
To: John Lofgren; time-nuts@febo.com
Subject: Re: GPS receiver testing
John,
thanks for your email, I am replying to Time Nuts as well as
John,
I would advice you to look at what Spirent and Pendulum can offer you
with regards to GPS simulators. The Pendulum GPS simulation should be of
interest as it is a fairly decent cost, where as the Spirent equipment
is really really good. One way to characterize PPS properties is to do
-Original message-
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Thu, Nov 1, 2012 00:11:51 GMT+00:00
Subject: Re: [time-nuts] GPS receiver testing
John,
I would advice you to look at what Spirent and Pendulum can offer you
with regards to GPS simulators
,Doug
Connected by DROID on Verizon Wireless
-Original message-
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Thu, Nov 1, 2012 00:11:51 GMT+00:00
Subject: Re: [time-nuts] GPS receiver testing
John,
I would advice you to look at what Spirent
On 11/01/2012 01:31 AM, k4...@aol.com wrote:
Magnus,
Most GPS simulators only have an OCXO in them which are not very good
for making precision timing measurements. The simulator needs to have a
rubidium in it or have an external input for a more precision frequency
source.
Not really, the GPS
Measuring 1PPS stability requires a counter and a reference. As Said mentioned,
the counter requirement is fairly simple: any sub-nanosecond counter like a
53132A is fine (higher resolution is wasted anyway). But the reference
requirement is the more difficult. If you want to measure down to
Hello Said,
I'm familiar with your postings on the Time Nuts list, so I thought I'd
ask your advice. I searched the Time Nuts archive, but didn't come up with
what I was looking for (reference to a good GPS tutotial).
We have a GPS project in-house that requires us to characterize
On 10/31/12 6:17 PM, Tom Van Baak wrote:
Please read John Plumb's paper:
http://tycho.usno.navy.mil/ptti/ptti2002/paper29.pdf
and Rick Hambly's paper:
http://tycho.usno.navy.mil/ptti/ptti2002/paper9.pdf
At JPL, most of the calibration and performance testing and such is done
using an
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