[time-nuts] The amazing $5 timestamper with 6ns, resolution (next stop: 184ps)

[Dan Kemppainen]

Hi,

I'm curious how this turns out. Please keep us updated on your progress.
So, what is the maximum sample rate you can record at?

One thought to look for a lower frequency with less jitter than a signal 
generator is TVB's PicDiv dividers. You could easily take the RB down to 
something lower that you is within your sample rate.
http://www.leapsecond.com/pic/picdiv.htm

If you ask nice, he has other source code for different divide ratios 
posted on his site. In my case, I needed to take 10Mhz down to 250Khz 
for testing a time stamping counter. It worked very well for this 
purpose, and was cheap and easy.

Dan




On 2/17/2021 4:59 AM, time-nuts-request at lists.febo.com wrote:
> Date: Tue, 16 Feb 2021 23:48:12 -0800
> From: Jeremy Elson<jelson at gmail.com>
> To: Discussion of precise time and frequency measurement
> 	<time-nuts at lists.febo.com>
> Subject: Re: [time-nuts] The amazing $5 timestamper with 6ns
> 	resolution (next stop: 184ps)
> Message-ID:
> 	<CAKufN8UdmWh9oTE4pZ=EY57+sxh2JSc4oD7gSw3w7Mt6FS=w4w at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
> 
> I've used jlcpcb before, but I have to admit I'm more of a pcbway guy. I've
> had a lot of good experiences with them, and their assembly special ($30
> for qty 10) plus LCSC parts is very cheap, I"ve had good luck with them.
> 
> You're right - the test I did conflated more than one thing. It was not a
> pure test of my timestamper so my next attempt once I get some time will be
> to use my Rb xo to run both the clock on my timestamper and a signal
> generator and then see really how much jitter there is. Of course, there
> will be some question if the jitter is coming from the timestamper or the
> signal generator, but I suppose the best case is that there is not jitter
> in either one! I'll keep the list updated as I do more experiments.
> 
> Cheers!
> 
> -Jeremy