[time-nuts] Interval Timer Recommendation

Magnus Danielson magnus at rubidium.dyndns.org
Wed Jan 9 01:42:52 UTC 2013


Hi Don,

On 01/09/2013 02:32 AM, 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.

Of the given set, the HP5370 will have much better single shot 
resolution compared to the HP5371/5372. The later is better at recording 
high rate events.

I have both HP5370 and HP5372 as they fill different purposes. I also 
have counters of better performance than these.

Trouble is, with PPS signals you experience jitter such that a 1 ns 
resolution of a HP5335 will suffice for most usages.

Cheers,
Magnus



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