[time-nuts] FE-5680A performance
Graham / KE9H
timenut at austin.rr.com
Thu Jan 5 00:12:45 UTC 2012
Said:
Thanks fro the explanation. I didn't understand the scaling method.
--- Graham
==
On 1/4/2012 4:12 PM, SAIDJACK at aol.com wrote:
> Hi Graham,
> the TSC5125A has auto-scaled the plot to 2E-04Hz fractional frequency
> from 10MHz, or in other words one vertical division is 2E-011 at
> 10MHz, or 20 parts per trillion, or 0.0002Hz error.
> I also don't like the way the TSC shows the frequency, and the fact
> that you can only capture about 9 minutes of information for some
> reason. Why not show 24 hours or 48 hours of data here?
> With this in mind, the FE5680A wanders around about +/-6E-011 max in
> this plot.
> Hope that helps,
> Said
> In a message dated 1/4/2012 13:41:07 Pacific Standard Time,
> timenut at austin.rr.com writes:
>
> On 1/4/2012 3:18 PM, SAIDJACK at aol.com wrote:
>> Here is a set of performance plots for the FE5680A that we had measured
>> before.
>>
>> Performance has improved significantly, ADEV is now in the xE-012's.
>>
>> Phase noise and spurs are worse than originally reported, they kind of
>> suck.
>>
>> Frequency over time looks quite nice though, definitely quite useful as a
>> frequency reference.
>>
>> bye,
>> Said
>>
> Said:
>
> Your vertical units per division for the frequency plot don't make
> sense.
> Please re-check and let us know.
>
> Thanks,
> --- Graham
>
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