On Wed, May 6, 2020 at 8:22 PM Bob kb8tq wrote:
> If all of that sounds like a lot of work (or not complete enough), buy a
> second ( or third
> or fourth ….) GPSDO. Next get a couple Rb’s …. maybe a Cs or three …. have
> you
> looked into Masers? :)
>
AT, AT. He meant "looked AT Masers" :-)
This discussion focuses on interactive audio/data streams. One-way streams
are treated differently, since delay is less important.
Media transport typically uses IPv4/6 networks and can often be captured at
one of the endpoints or somewhere in the network path. E.g., I captured a
Skype call
On Wed, 06 May 2020 12:00:02 -0400, time-nuts-requ...@lists.febo.com
wrote:
Re: time-nuts Digest, Vol 190, Issue 10
>
> --
>
> Message: 6
> Date: Wed, 6 May 2020 07:00:51 -0700
> From: jimlux
> To: Discussion of precise time and frequency measurement
>
>
for fun
Original Message
SUBJECT:
[New post] Sun-Seeking Sundial Self-Calibrates in No Time
DATE:
2020-05-06 14:01
FROM:
Hackaday
TO:
On 5/6/20 7:33 AM, Chris Howard wrote:
At my current job we were looking into delay timings of video systems.
We were doing end-to-end measurement by putting a time display in front
of a monitor
and have the camera show both the time display and the monitor.
It looks a bit like the old
Sorry, images where too big, had to repost.
Please use this link
https://www.iw2jww.it/trimble-and-progrock/
to download them, thanks.
On 5/6/2020 8:57 PM, Giuseppe Marullo wrote:
Ok,
first of all many thanks for your help. Yep, not exactly a time-nut
piece of engineering, but I need more
Good day
Easy way of testing such is to make a skype or team viewer call and then
get the other side to synchronize the computer that side as simultaneously
as possible with you by click on change date and time settings and then
Internet time. It for a few seconds are absolutely perfect but
At my current job we were looking into delay timings of video systems.
We were doing end-to-end measurement by putting a time display in front
of a monitor
and have the camera show both the time display and the monitor.
It looks a bit like the old infinite mirror.
If you arrange things right
Given that there's a lot more people spending time zooming, webexing,
teaming, skype, facetime, etc. these days, I'm curious if anyone has
figured out to *quantify* the issues of lag, desynchronization, etc.
How would one go about instrumenting it (without access to the source
code or servers
Hi
Sure, phase lock vs frequency lock is a fun twist to this. Does it matter
in the general case?
Regardless of phase lock vs frequency lock, the error on the device should
be below the 1 ppb limit mentioned in the post. That’s plenty good enough
to resolve the 0.25 ppm (ppm not ppb) errors
Bob, your list isn't bad, but it completely misses the point whether the
lock is phase-lock (certainly what anyone in telecom trying to lock a wide
network would expect) or frequency-lock (like some BG7BTL's and probably
some other Chinese clone cobbled-together units).
A large chunk of hobbyist
Hi
With any GPSDO (not just the TBolt) you can do some basic checks:
(They are in no particular order)
1) Are there > 6 sats in view at all times, if not, move the antenna
2) Is the unit locked to at least 4 sats at all times, if not, move the antenna.
3) Has the unit completed its survey
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