alt.sci.physics

I'm trying to find out how to pulse a DC power supply.

I'm not an engineer but I have basic electronics skills. I've read in
a few places that a function generator can do this. If so, I assume
the power supply goes through the function generator and the output of
the function generator is pulsed DC based upon the frequency selected
on the function generator?

If this is the case, can anyone suggest a relatively cheap function
generator up to a $200 range? As for frequency, I'd like something
that can go up to 1MHz, if possible for that price cap. The DC power
supply would be in the max 30 volt and 1-2 amp range.

Thanks,
Jeff