"Ian Bell"
Lastly, the scope is a Rapid Electronics 7020A 20MHz dual channel
(which is a re-branded Pintek) and its -3dB point is quoted as 20Hz.
** Shame how that is just NOT so.
The 7020A has its -3dB point at ** 3.4 Hz ** when in "AC" input
coupling mode.
As is common practice with most scopes, a 47nF 400 volt film cap is
placed in series with the 1 Mohm input to each vertical amplifier :-
f -3dB = 1 / ( 2.pi.C.R)
Here is the schematic for the whole scope.
http://www.rapidonline.com/netalogue/specs/85-2200.pdf
Pity your comprehension skills are so poor.
** What a pile of sub human garbage you are - Bell.
Be a shame to make you into dog food cos dogs deserve better.
I quoted the manufacturers spec.
** Go on - prove that.
Post a link to it.
YOU LYING CRIMINAL **** !!!
Clearly it is conservative.
** More 100% ********
....... Phil