Hi Like most things in life, what you want and what you can afford generally are in opposition to each other :)
The TimePod *is* the beast to use. A lot of us would love to get one at a “good price”. They sell for $10K and up from Microsemi when bought new. Exact price varies with the options enabled and whatever sale they might be running at the time. Everything else on the list will struggle at 0.1 seconds in terms of any sort of accuracy close to what you are after. At 1 second, the DMTD will do a pretty good job, with some constraints on the signals you are looking at (all at exactly 10 MHz). Often the “what to compare to” problem is addressed with multiple references. Maybe a good OCXO close in and a Cs standard further out. You probably will get past 1,000 seconds fairly quickly. The “what does the next point look like” bug is a dangerous one :) If you go back in the archives (or on the NIST Frequency & Time site) they did a “DIY TimePod: with an off the shelf SDR. The results were quite good and the cost was not to bad. I’ve always been a bit surprised that none of us have gotten something like that running in our basement. Can you do it with a $300 SDR board? Who knows …. Lots of options …. Bob > On Apr 15, 2018, at 11:59 PM, AC0XU (Jim) <james.schatz...@ac0xu.com> wrote: > > I would like to make time stability measurements of various clock sources > over a time range from 0.1 sec to 1000 sec and down to as much below 10^-12 > as I can afford. Mainly I am interested in 10 MHz but also would like to be > able to test stability and phase noise of synthesizers at higher frequencies > (up to maybe 300 MHz or so). > > I do not have a hydrogen maser and I am aware of the need for a stable > reference clock. > > My question is what device would be best for this purpose: > > 1) Agilent 53230A > > 2) HP 5370B > > 3) Timepod (and is it possible to purchase one and if so how?) > > 4) Some other device such as has been mentioned in other postings (W.J. > Riley, etc.) > > My supposition is that #1 and #3 cost about the same and #2 is considerably > cheaper. All three are supported by Timelab. > > Don't think that I can afford the Microsemi 5120A or 5125A. > > Not understanding the tradeoffs, I would appreciate some advice. > > Thanks! > > Jim > > > _______________________________________________ > time-nuts mailing list -- firstname.lastname@example.org > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.