Javier Herrero wrote:
Hello,
I will need to measure the phase noise of a 35MHz oscillator in the
range of 1 to 100Hz (well... and also at a higher range but this is no
problem), and I would like to know about the different alternatives. I
would like not to have to mess too much with mixers and soundcard
sampling, if possible :)
I think that the HP 5372A with opt 040 is able to do that, is this
right and worthy? If so, opt 040 is a pure software option or requires
also additional hardware? Would be possible also with a 5370A and
software processing of the raw data? Any other alternatives?
Thanks! Regards,
Javier
The 5372A or 5370A will only suffice if the phase noise is sufficiently
high.
They are likely to be too noisy by several orders of magnitude for a
good crystal oscillator.
However they may suffice for something like a noisy ring oscillator or
even a low Q LC oscillator.
There's also the question of defining the bandwidth so as to avoid
folding high frequency phase noise into the measurement when the phase
sampling rate is relatively low as it will likely be with a 5370A..
Bruce
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