[time-nuts] FE-5680A performance

[Graham / KE9H]

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
>