[time-nuts] FE-5680A performance

Azelio Boriani azelio.boriani at screen.it
Wed Jan 4 22:17:22 UTC 2012


Wow, have you a TSC5125A? Lucky you...

On Wed, Jan 4, 2012 at 11:12 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_ (mailto: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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