Oscilloscope 251 -

You can often find a used, working Oscilloscope 251 for $50 to $150 USD. A comparable new 20 MHz DSO would cost $300+, and a high-end analog scope would be $1,000+.

In a standard curriculum, the following measurements are typically performed: oscilloscope 251

VOLTS/DIV: The rotary knob. Turn clockwise to zoom out (less vertical sensitivity). Pro tip: Avoid turning it fully counter-clockwise to "5V/div" when looking at a 100mV signal.