[time-nuts] Signal Hound

Orin Eman orin.eman at gmail.com
Mon Apr 15 00:11:12 EDT 2013


There is a yahoo group for the Signal Hound.  For one user, the original
Signal Hound showed really poor phase noise performance with an external
reference with the internal reference always being better... see the
"External ref vs internal ref.pdf" document on the yahoo group for
details.  The plot presented in that document looks really bad.

Orin.


On Sun, Apr 14, 2013 at 8:39 PM, Jim Lux <jimlux at earthlink.net> wrote:

> Inexpensive USB spectrum analyzer.. http://www.signalhound.com/
>
> I think it has the ability to capture raw samples, too. (the BB60
> definitely does.)  They have a 10MHz ref input.
>
> The spectrum analyzer has a phase noise feature
> Phase Noise Plot
> : Displays the phase noise amplitude, in dBc/Hz, vs. offset from carrier
> when checked. You must have a span of 10 KHz or less, and the signal should
> be within 1 division of the reference level (e.g. within 10 dB). This
> utility takes about 1 minute to run. It will sweep several times, then
> combine the sweeps into a phase noise plot. The data is approximate and is
> limited by the phase noise of the SignalHound itself. For best close in
> phase noise, use an external 10 MHz reference with > 10 dBm power level. To
> resume normal operation,click "Phase Noise Plot" a second time to un check.
>
>
> Anyone fooled with one?  Think it might work as a low cost part of a phase
> noise test set.
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