[time-nuts] HP 5370B

marks twotoe.com marks at twotoe.com
Fri May 9 18:53:14 EDT 2008

Thanks Chuck,

I found FEBO has an article on the 5370B here 

As a footnote, my 5335A is rock stable sitting on 10 Mhz all day.

Best regards,

> Date: Fri, 09 May 2008 10:28:00 -0400
> From: Chuck Harris <cfharris at erols.com>
> Subject: Re: [time-nuts] HP 5370B
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID: <48245F70.7040907 at erols.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> That is normal for 5370 type counters.  The are time interval counters
> that can also measure frequency.  Frequency is not their best feature.
> -Chuck Harris
> marks twotoe.com wrote:
>> Could someone confirm if this behaviour is normal on a 5370B.
>> When measuring the output of my standard the 10th and 11th digits are
>> constantly changing.
>> Do I need a 10Mhz low pass filter on the input of the counter to get an
>> accurate result or should I just ignore this behaviour?
>> Many thnaks,
>> Mark

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