Understanding Oscilloscopes - ENOB

This video provides a short technical introduction to ENOB, or effective number of bits, and how ENOB is used to evaluate the performance of digital storage oscilloscopes

Timeline:
00:00 Introduction
00:13 Suggested Viewing
00:32 About analog to digital converters (ADC)
01:28 Quantization levels and vertical resolution
02:16 Input signal scaling and vertical resolution
03:10 Effective number of bits (ENOB)
04:28 What determines ENOB?
05:03 ADC contribution to ENOB
05:45 Other contributions to ENOB
06:40 Calculating ENOB
07:27 Reporting / plotting ENOB values
08:12 Example ENOB curves
08:45 Summary

[bellkidsbasketball]

Another great video. Simplifying a complicated topic.

[zynthos]

How would one estimate noise and distortion power?

I expect noise power would mainly be a function of ADC noise figure and additive noise and of VGA noise figure?

And distortion power would be a function of mainly VGA's IP3 and IP2 ratings (assuming the level isn't high enough to drive into compression/saturation)? To me this only makes sense if you assume multiple signals present

[terrysteven]

Doesn't the viewing screen affect the ENOB. A 1920x1080 tft screen for example can only be sliced 1920 times so wouldn't this limit the number of effective bits to around 11 ( 2 ^11 = 2048).

[lixiang]

For god sake, people need to stop saying "and/or". If you do a logic "or" between "and" and "or", you effectively get the logic "or", assuming "/" means the logic "or". So "and/or" is the same as a simple logic "or". Try analyzing this with venn diagrams and you'll know what I mean, please.