[time-nuts] Interval Timer Recommendation

[dlewis6767]

Hi Magnus, ....good day.

Thanks for the thoughts, ...that was pretty much where I was headed.  I 
think I will hold out a while for a 5370, ....watch eBay, see if a 
reasonably priced unit pops up.

If anyone has one for sale for a nice price, please let me know.

-Don






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From: "Magnus Danielson" <magnus at rubidium.dyndns.org>
Sent: Tuesday, January 08, 2013 7:42 PM
To: <time-nuts at febo.com>
Subject: Re: [time-nuts] Interval Timer Recommendation

> 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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