[time-nuts] 53230A noise floor

Magnus Danielson magnus at rubidium.dyndns.org
Tue Jul 7 08:24:08 EDT 2015


Anders,

Beware that there is both lambda and omega filterings on counters to 
enhance their performance over pi counters, and that this relates to 
frequency output. However, for propper ADEV and friends you have to be 
careful. TI-mode is to be used in order to avoid the lambda or omega 
properties.

Enrico Rubiola and Francois Vernotte has made a number of publications 
on that subject.

Cheers,
Magnus

On 06/24/2015 07:39 PM, Anders Wallin wrote:
> I finally had time to  compare the 53230A CONT (resolution-enhanced, aka
> lambda-counting) and RCON (undocumented! reciprocal continuous counting,
> aka pi-counting) modes, and wrote down some notes:
> http://www.anderswallin.net/2015/06/cont-vs-rcon-mode-on-the-53230a-frequency-counter/
> comments on my notes, here or in the blog, are welcome.
>
> enjoy!
> Anders
>
> On Tue, Apr 7, 2015 at 9:42 PM, Mod Mix <modmix at t-online.de> wrote:
>
>> Ole Petter Ronningen:
>>
>>> Tangetially relevant; I made a "patch" for TimeLab to use the gap-free
>>> frequency measurement-mode for the 53230A, if anyone is interested.
>>>
>> Thanks for this great support!
>> Ulli
>>
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