[time-nuts] Interval Timer Recommendation

[Ed Palmer]

In the past there has been much discussion on this list regarding the 
relative strengths and weaknesses of the 5370 (20ps resolution) and the 
5371/5372 (150ps resolution) units.  There are other units that have 
even better resolution, but they tend to be pricey and/or more specialized.

Moving down another step in resolution, the Racal-Dana 1991 and 1992 (1 
ns resolution) counters also have their fans (like me), but they do have 
problems with their front panel buttons (actually the switches under the 
buttons).

Yes, the prices on ebay are becoming increasingly ridiculous. 
Occasionally a seller will have an attack of sanity and post a 
reasonable price.  You may also get lucky with a unit that is defective, 
or advertised as such, but has either no fault or a repairable one.

More info on all of these topics is available by using Google with the 
site:www.febo.com advanced search term.

Ed

On 1/8/2013 7:32 PM, dlewis6767 wrote:
> I am looking to upgrade my older HP 5245L counter/ timer to one with greater resolution.
>
> In my home lab, I have been collecting GPS timing modules (receivers) and just want to start measuring their 1PPS jitter, etc. over one period.
>
> The 5245L will only measure to 100ns with a 1 second pulse (.1us period at 1 period).
>
> I was looking at the HP5370/ 71/ 72 series counter/ timers.  What is the best resolution they can provide for a one second pulse (over one period)?
>
> Do you have any recommendation as to which one of the three models is the better unit?  (Their display technology, age and cost not withstanding.)  All three models seem greatly overstated in price on eBay, seems, too.   Not sure why, ...just supply and demand; I presume.
>
> Thank you for your advice; I appreciate your thoughts.
>
> Don Lewis
> Austin, TX (Hyde Park)
>