[time-nuts] Re: Instruments for 1PPS accuracy measurement

Bob Camp kb8tq at n1k.org
Wed Sep 4 19:15:58 UTC 2024


Hi

What are you trying to do? 

Some GPSDO’s can be *very* accurate.

As you go from worrying about nanoseconds to worrying about picoseconds or femtoseconds the “what you need” (and what it costs) goes up.

In what environment are you trying to do it? 

A research organization with million dollar equipment budgets is very sort of thing than a basement lab looking for gear on eBay. 

Do you already have a standard to compare to?

All of this work is a “compare A to B” sort of thing. This becomes at least as important as the measuring instrument. Ideally you would like a standard that is much better than the device you are measuring. This can get a bit crazy.

What is the objective of your project?

This as much as anything will drive what you need and what you should be looking for. 

Lots and lots of directions this could go and heading in the wrong direction is going to get very confusing very fast.

Bob

> On Sep 4, 2024, at 6:33 AM, jelveh_t--- via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> HiI am new to time and frequency measurements.
> I want an instrument to measure and compare 1PPS stability and accuracy of different GPSDOs and GPS modules.I did not see any advice or help on the site for the instruments suitable for these type of measurements.Would you mind helping me find a list of suitable instruments? It would be appreciated if the price and lead time of each instrument is provided, as well.Thank you for helping me.
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