Products > Test Equipment
HP 53310A Modulation Domain Analyzer -frequency microscope-
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bozidarms:
Hi to the group,

i would like to introduce my new toy (Christmas gift) - HP 53310A  Modulation Domain Analyzer :-+
Maybe -frequency oscilloscope- or even -frequency microscope- is better name.
Unfortunately,  there's remarkably little info about this  exceptional instrument,
these are  like Cinderella in the world of instruments.

Anyway, here are the two pictures(histograms) from two 10MHz signals:
first one is legendary  HP 10811 oven oscillator,
second one is from GPS freq. standard (unbelievable bad one).
It is clearly visible how good venerable 10811 is (phase noise and jitter are superb)
 and how corrupt is another one.
In both cases 53310A settings are the same - frequency span is only 1(one)Hz,
and by far that is not a limit of 53310A!

Regards
Vgkid:
Geller did a writeup of it. Always wanted one, but the cost and the size were to much.
http://www.gellerlabs.com/hp53310A.htm
bozidarms:
Yes, one would pay a little bit more, but not more than for a proper frequency counter ;),
so for the same money you get a high-end instrument with unbeatable features.

Now you can  measure and visualize  processes which were  untouchable  before -
the whole microcosm within one single signal!
Besides that,  the fun factor  is tremendous :-/O.
bozidarms:
Another interesting case:
HP 10811 vs high quality IQ-DDS generator (DL1SNG/DL1FAC)

1- HP 10811
it is presented beautiful Gaussian distribution by 200mHz span,
and frequency vs time diagram by 200mHz span

2-IQ-DDS
in contrary, by 200mH span frequency distribution was almost terrible,
therefore distribution by 500mHz span,
and frequency vs time diagram, but by 10Hz span

Unfortunately, as everything in life
HP oscillator isn't perfect:
harmonic distortion by HP  is only 25dB down,
in contrary by IQ-DDS almost unmeasurable!
Tomorokoshi:
There are a couple threads on that instrument here:
https://www.eevblog.com/forum/testgear/hp-53310a-modulation-domain-analyzer/

https://www.eevblog.com/forum/repair/hp-53310a-power-supply-troubles/

Which reminds me that I still have to work on my power supply for preventive-maintenance.
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