why are resolution, accuracy, sensitivity bandwidth, and imput impedance on an osciliscope important

[Corky]

i have answered a few of these, the resolution i have lead to the screen resolution and that it helps as we can take the information of the screen with more accuracy i started on bandwith but im unsure what the sensitivity bit is, aand the others i cannot find anywhere to research the importance of them, this is a merit question which i would like to get the mark for i dont mind researching if people know where i can read about this. any help would be great thanks

 

[KeepItSimpleStupid]

These are EASIER to explain when thinking about a DSO of today.

Let's go in a different order:

Bandwidth: The signal is the FM IF of 10.7 MHz. The Bandwidth of the scope is 5 Mhz. What's gonna happen?
Input

Input Z: The circuit your measuring LOOKS like a 5 Meg resistor to the scope. The scope has a 1 M input Z. What's gonna happen? More importantly what might happen when you 50 ohm Z scope is connected to things?

(A little more complicated: The scope is normally 1M shunted by about 22 pf and scopes are available with 1 M and 50 ohm inputs. Look for info on probe compensation and impedance divider, )

Sensitivity: should be easy. It determines the lowest signal you can measure.

resolution: Resolution is harder to define. Think of graticule on normal scope and the # of bits of the A/D converter on a DSO.

Accuracy: That should be easy. For DSO's look up quantization error. Without cursors, accuracy suffers.

 

[cowboybob]

I Googled: "things to consider when buying an oscilloscope".

This popped to the top;

https://www.picotech.com/applications/oscilloscope_tutorial.html

 

[ramuna]

CowboyBob's link gives an excellent review.