What is the y gain control or the time base control?

Question

and how is it used the peak voltage and frequency of an Alternating Current supply???

thanks!!!

Answer 1

I think you referring to a signal generator. The Y-gain is the amplitude while the time base is the frequency control.

Does that help?

Answer 2

The y gain control (on a CRO, presumably) controls the amount of up and down movement of the spot on the screen.  This measures the voltage of a signal. It either amplifies or attenuates the voltage applied to the x plates so that the signal fits nicely on the screen.

The timebase control (x direction) controls how fast the spot flies across the screen from left to right.  For rapidly varying signals you need to set the time base control to a high speed value (milliseconds or microseconds per centimeter or whatever).

To measure mains voltage parameters you would probably set the y gain to, say, 50 or 100 volts/cm and the timebase to 5 or 10 milliseconds/cm.