[Re 60 MHz scope]
No. It is 3dB Bandwidth. Degrade will start earlier. You will have
lost half power or in voltage around 30% of the signal.


The idea that a 55 MHz sine wave of 5 volt P-P amplitude would only
register about 3.6 volts on a 60 MHz scope is an alien idea to me.
That would render such a scope all but useless....

I think it is possibly a European style definition of the scope
bandwidth as a 3 Db down bandwidth that's causing this debate.

I suggest that in American usage, I would be more likely to expect a
60 MHz sine wave to be not more than 5% down as indicated on a 60 MHz
scope with its maker's standard probes.

Brian W