[time-nuts] Phase Noise Comparisons

[Magnus Danielson]

Yes. Thanks Ulrich!

Cheers,
Magnus

On 01/17/2016 02:00 AM, KA2WEU--- via time-nuts wrote:
> Did my plot make it ?  Ulrich
>
>
> In a message dated 1/16/2016 7:01:41 P.M. Eastern Standard Time,
> rob at nc0b.com writes:
>
> I did  some interpolation to compare the specs for phase noise of the 8660
> the way it  was done then to the present method. I think it is going to be
> something like  -105 dBc/Hz to -110 dBc/Hz at 10 kHz offset at 14 MHz carrier
>   frequency.
>
>
>
> As a comparison, the 8662A is about -135 dBc/Hz and  the 8642A is better
> than -150 dBc/Hz.
>
> Actual measurements on multiple  generators in my lab.  Unfortunately I
> have never used or measured an  8660.
>
>
>
> 3335A -128 dBc/Hz
>
> 3336C -120 dBc/Hz
>
> 3325A  -115 dBc/Hz (original version.  Later improved by 4 pr 5 dB after
> the  3336C came out.)
>
>
>
> As a comparison a Rigol DG4162 is -115 dBc/Hz  All at 10 kHz offset and on
> the 20 meter band.
>
>
>
> It depends what  you are trying to measure. Sensitivity or noise floor,
> anything will work  within the range of specified output accuracy and leakage.
> On the other  hand, if you are trying to measure the dynamic range of a
> receiver, or its  phase noise characteristics, you cannot do that with most
> generators.
>
>
>
> Rob,  NC0B
>
>
>
>
>
>
>
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