[time-nuts] Best counter setting for ADEV?

Said Jackson saidjack at aol.com
Tue Oct 2 13:06:04 UTC 2012


There are two on ebay now, $600 and $700... Buy it now..

I would ask the seller to connect the 100MHz ref output to both inputs one at a time and to measure jitter to make sure they work before buying though..

Dts-2075 recommended due to higher performance.



On Oct 2, 2012, at 5:49, Azelio Boriani <azelio.boriani at screen.it> wrote:

> Wavecrest DTS for $600? Interesting...
> 
> On Tue, Oct 2, 2012 at 2:43 PM, Adrian <rfnuts at arcor.de> wrote:
> 
>> Timeok schrieb:
>> 
>> test using HP53123A:
>>> The pink line is the noise floor using the TI mode
>>> The blue line is the noise floor using the Frequency mode (gate 2 sec)
>>> The other two line are the same oscillator, an HP105B tested with both
>>> the modes.
>>> As you can see the range between 1 and 200 sec is "totally
>>> compromised" by the system noise floor using the TI method.
>>> The approximation using the freq mode can be anyway usefull to make a
>>> comparatinon between two source.
>>> I suppose to have right measurements, without any restriction we have
>>> to use the Timepod or other high level instruments than this kind of
>>> counters.
>>> 
>>> Luciano
>>> 
>> 
>> Hi Luciano,
>> 
>> interesting. So, the 53132A gains a lot more by this method than my 53131A.
>> As Magnus pointed to, there might be pitfalls. So, it would be interesting
>> to have comparative measurements from a non questionable test setup.
>> 
>> In the meantime I tried a Tracor 527A which greatly improved the dynamic
>> range, but appears to suffer from serious instability that might or might
>> not be normal.
>> 
>> Adrian
>> 
>> 
>> 
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