My internet has been down all day, and now that it's back up, I see a bunch of
requests for receivers. They're all spoken for now, and in fact maybe a bit
over-subscribed. I'll contact each of you individually who responded offline.
Bob
___
time-nuts
Claude wrote:
I know how to measure ADEV with frequency method (using a 53131A
counter) or time difference method (using 1 PPS of a GPSDO for
example) but I would like to measure ADEV in the sub-second domain
(from 0.1s to 1s for example). Do I need a Time Interval Analyzer,
if so, an HP 5371
Moin,
I recently discovered openEMS[1], which is, very simply put, a fancy
antenna simulator. I played a little with it and thought about
trying to optimize an GPS patch antenna design for timing use.
But I had to discover that I actually do not know what to optimze for.
There are many paramters
Claude
>what is the simplest method to measure sub second ADEV?
The answer depends on many unstated things.
Among them is your definition of simple, the Frequency of the DUT, the noise
floor, your budget and your available time..
After budget and frequency, the next most important thing is the
Bob,
Understood regarding NTP; I just thought if it had to be monitored anyway
it could pull double duty. I guess that is not so important.
It appears they are selling well enough to keep up with or otherwise
deplete their supply of surplus OCXOs, so there is probably little
motivation to fix pro
Hi
The cheap / simple approach for ADEV is a single or dual mixer setup. Mix the
signal(s) down to an audio frequency and measure those. Mix down
frequencies like 10 KHz will let you measure some pretty short Tau’s.
If you want a purchased single box solution, then something like a TimePod will
Hello
I know how to measure ADEV with frequency method (using a 53131A counter) or
time difference method (using 1 PPS of a GPSDO for example) but I would like to
measure ADEV in the sub-second domain (from 0.1s to 1s for example). Do I need
a Time Interval Analyzer, if so, an HP 5371A is ok fo
On Mon, 27 Apr 2015 14:49:37 -0400
d0ct0r wrote:
>
> "In another advance at the far frontiers of timekeeping by National
> Institute of Standards and Technology (NIST) researchers, the latest
> modification of a record-setting strontium atomic clock has achieved
> precision and stability leve
Okay, I've tried to research this for a few days, and seem to be running
into conflicting data.
Some articles say that UT1 is based on the IERS Reference Meridian (IRM).
Other articles say that UT1 is based on mean solar time at the Prime
Meridian (Greenwich). It can't be both! Which one is
