In other words, there's enough energy to cause problems at 2, 6, 10 ... times f, but at rapidly declining levels.
> It will filter the components of the wave that are outside of its bandwidth, leading to 'ringing' artifacts ...
Ringing artifacts are present in a system whose bandwidth rolls off abruptly. It's less significant in a system with a gradual drop-off in response, like a piece of wire acting as a broadband antenna.
On the contrary. An ideal square wave's higher harmonics decline rather quickly:
http://en.wikipedia.org/wiki/Square_wave#Examining_the_squar...
In other words, there's enough energy to cause problems at 2, 6, 10 ... times f, but at rapidly declining levels.
> It will filter the components of the wave that are outside of its bandwidth, leading to 'ringing' artifacts ...
Ringing artifacts are present in a system whose bandwidth rolls off abruptly. It's less significant in a system with a gradual drop-off in response, like a piece of wire acting as a broadband antenna.