12 Nov
2017
12 Nov
'17
8:18 p.m.
On 11/12/2017 6:58 PM, Marc LeBrun wrote:
If I add two sine waves of equal amplitude but with 180deg phase difference, I get zero - clearly not an RMS of the amplitude/sqrt(2). That fooled me too until I remembered "...with different frequencies ..."
So take twice the frequency. The frequencies you sum to get a square wave are not just some random ones. They are all multiples of a fundamental. Brent