Products > Test Equipment
Best 14-Bit Digital Oscilloscope
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edavid:
If that's supposed to be liquid nitrogen, it still doesn't get you there.

-196C, 50 ohms, 100MHz -> 5uV RMS -> 30uV P-P
nctnico:
You can always parallel channels to even out the noise.
David Hess:

--- Quote from: trentender on October 13, 2023, 01:31:25 pm ---I should also have said at the beginning need the -3db bandwidth of the scope to be 100MHz minimum but targetting 200MHz
--- End quote ---

That sure is not going to happen.  The old Tektronix 7A22 vertical amplifier has 10 microvolt per division sensitivity, but even at a bandwidth of 1 MHz that is questionable.  Modern parts can do a little better, but not enough.

What could work however is to trigger off of a higher level signal and then use averaging.


--- Quote from: nctnico on October 13, 2023, 11:30:20 pm ---You can always parallel channels to even out the noise.
--- End quote ---

The added parallel input capacitance then limits the bandwidth, so a lower source impedance is required.
JeremyC:

--- Quote from: trentender on October 13, 2023, 12:03:12 pm ---Hi,
   I am looking for a low cost (<=£1000 max appoximately) 14-bit digital oscilloscope which can accurately measure and trigger on analogue signals (eg. 100KHz sinewave) down to less than 20uV peak-peak so it needs to be a scope with a very low noise level. Just being 14-bit does not mean that a scope can measure below 20uVpp since the broadband noise generated inside the scope might be at a much higher level than 20uVpp. So does anyone out there know of any great,low cost ,low noise 14 bit digital oscilloscopes which might fit the bill?

Cheers,
Ian

--- End quote ---

coromonadalix:
ill wait for an 24bit scope  loll
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