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

[Ed Marciniak]

Is it reasonable to suggest someone download lady heather or PN (via KE5FX) and play with some hardware that works with it so they know the right questions to ask?

I jumped off the deep end, starting with an E5504 phase noise system.

For my use case though, I want to build better microwave LOs and quantify the improvement. They could be 10Hz off and it wouldn’t matter. They just can’t be drifting too much to find other states ins buried in the noise?
________________________________
From: Bob Camp via time-nuts <time-nuts at lists.febo.com>
Sent: Wednesday, September 4, 2024 2:15:58 PM
To: Discussion of precise time and frequency measurement <time-nuts at lists.febo.com>
Cc: Bob Camp <kb8tq at n1k.org>
Subject: [time-nuts] Re: Instruments for 1PPS accuracy measurement

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.
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe send an email to time-nuts-leave at lists.febo.com
_______________________________________________
time-nuts mailing list -- time-nuts at lists.febo.com
To unsubscribe send an email to time-nuts-leave at lists.febo.com