David wrote:
This does appear now to be working - see below. I'm not exactly sure what
was the secret to getting this to work, but the above procedure seemed ok.
Time. It is not at all unusual for a 58503A that has no almanac (or an
out-of-date almanac) to take several days to achieve discip
Thanks, yes you are right, memory was just jogged and the elevation for the
Jupiter is set with if I recall with a radian calculation entered with two
bytes in a binary word statement. A real pain to figure out.
I think it has completed the survey and is displaying "Position Hold Mode". Is
th
On 18 December 2016 at 22:41, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkir...@kirkbymicrowave.co.uk> wrote:
> It is looking much better now. I
>
> 1) Powered off
> 2) Left off for 30 s
> 3) Pulled antenna out.
> 4) Powered on
> 5) Connected antenna, making sure if was firmly screwed in.
>
> It
Just noticed by accident if you have a small screen mode if you click on the
top of the screen and drag it up above the top of the monitor and release the
mouse button it will change to full screen mode. Learn something new every day!
73,
Bill, WA2DVU
Cape May
Ahhh, full screen mode... the d
COFS is the clock offset value (whatever that is). Heather has plots for four
receiver provided values. One the Thunderbolt these were the OSCillator
offset, PPS offset, DAC, and temperature (OSC plot defaults to off since it
mostly looks like noise). On other receivers the plots are assigned
Hi
> On Dec 19, 2016, at 11:55 AM, David J Taylor
> wrote:
>
> From: jimlux
>
> And pretty much any of these will ingest a 1pps + message, rather than,
> say, a 10 MHz reference.
>
> Why not just use the raw GPS 1pps (which is typically good to a few tens
> of ns)? GPS coverage/outage and r
Being playing round with Lady heather 5.0 (really impressed) and my Jupiter-T
receiver using Zodiac mode. But what is COFS. Can not find anything in the help
or on the internet. Is it short for something?
I did notice a couple bugs relating to rounding off. If I set the elevation
mask to 10 d
Hi
> On Dec 19, 2016, at 10:11 AM, Tom Van Baak wrote:
>
>> I believe the power industry is using GPS provided time to stamp power
>> events for analysis as well.
>
> Chris,
>
> Yes, in fact one of the first applications of hp's SmartClock was just that:
>
> "Accurate Transmission Line Fault
From: jimlux
And pretty much any of these will ingest a 1pps + message, rather than,
say, a 10 MHz reference.
Why not just use the raw GPS 1pps (which is typically good to a few tens
of ns)? GPS coverage/outage and random variation in the GPS 1pps
A lot of them use a disciplined oscillator to
Probably... the manual does not go into exact details of what they are sending.
-
> If the hex number isn't the DAC output voltage, what is it? The code
being fed to the DAC?
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> I believe the power industry is using GPS provided time to stamp power
> events for analysis as well.
Chris,
Yes, in fact one of the first applications of hp's SmartClock was just that:
"Accurate Transmission Line Fault Location Using Synchronized Sampling"
http://leapsecond.com/hpan/an1276-1.
On 12/19/16 6:28 AM, Chris Caudle wrote:
On Sun, December 18, 2016 10:20 pm, Bob Stewart wrote:
I do understand the reasons that these users want this quality of
output. It's who these users are, what fields, industries, etc, that I
didn't quite understand.
Magnus wrote a paper recently on eff
On Sun, December 18, 2016 10:20 pm, Bob Stewart wrote:
> I do understand the reasons that these users want this quality of
> output. It's who these users are, what fields, industries, etc, that I
> didn't quite understand.
Magnus wrote a paper recently on effects of the GPS time slip (recent
error
Mark wrote:
The Z3801A does have a request for getting/setting the DAC value as a absolute
(hex) number.
Neither format tells you what you really want to know... the actual DAC
voltage.
If the hex number isn't the DAC output voltage, what is it? The code
being fed to the DAC?
Just curio
You know, there's a reason this list is called "time-nuts" and not
"frequency-nuts" :-).
But sometimes I wonder if "phase-nuts" might be a better term.
It is so incredibly useful to put your best 1 PPS into a scope and use that
to watch for systemic effects on your second-best clock. That's why w
Hi
The vast bulk of all GPSDO’s sold over the last three decades were sold because
the first
CDMA specification required that the basestation operate without a GPS signal
for
24 hours. During that time the alignment of the Gold Codes is required to be
within
10 us of “GPS time”. Once the codes
Hi Bob,
One thing I've never really understood is who actually uses the high-quality
1PPS output from a GPSDO.
I use it for NTP server, like many others also do around the world.
--
73s!
Esa
OH4KJU
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T
One application is advanced network diagnostics eg cards like this:
https://www.endace.com/endace-dag-high-speed-packet-capture-cards.html
So for a 40 GbE card, time-stamping 1 kilobyte packets demands
sub-microsecond accuracy, if you want to compare at different points
in your network.
Cheers
Mi
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