Claude,
On 22/03/14 12:48, Claude Fender wrote:
Hi,
I have two generators 3324A and 33120A and one counter 5334B. All the
instruments are locked to a GPSDO.
I've measures a 1 kHz output of the generators with the counter set with a
gate time of 1 second, and repeated the measure 3600 times.
The average for the 3324A is 999.9999996 Hz with a standard deviation of 6.79E-5
The average for the 33120A is 999.9999986 Hz with a standard deviation of
1.04E-5. (see joined graph)
The resolution of the 3324A is 1 mHz, the resolution of the 33120A is 0.1 mHz
So here is my question ! Do you think if I find a generator with a resolution
less than 0.1 mHz, the repetability will be better ? If so, do you have any
advice for some stuff less than 1000 USD ?
Thanks in advance !
The 3325A/B has 1 uHz resolution.
Be careful when making frequency measurements, as some counters can
create a small measurement bias. Using TI-mode and TimeLab you can avoid
this.
Cheers,
Magnus
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