I am making a model of a frequency mixer on the HP48GII. I need to make a square wave as part of this.
The way I thought I would do it was to make a cosine wave and then use the SIGN function to give me a +1 when it's positive and a -1 when it's negative. I seem to get a line at +1 not the expected result.
The formula I have in Plot is 'C1(t)= SIGN(cos(2*(pi)*F1*t))'.
t is the independent variable.
Anyone know why it doesn't work?
Ed