What approximate frequency corresponds to T = 20? Explain why the VOLTS/DIV knob

Question

What approximate frequency corresponds to T = 20?

Explain why the VOLTS/DIV knob doesn’t have to be calibrated and the TIME/DIV button must be calibrated when measuring time-constants.

Why is it important that all the BNC ground wires are directly connected to each other? (Hint: draw the RC circuit and include the connections to the oscilloscope that you’ll use. Remember that you’ll simultaneously use the oscilloscope to look at the [output] voltage across the capacitor and the [input] voltage across the function generator.)

Explanation / Answer

a) Approximate frequency corresponding to T= 20 is:

f=1/T=1/20

Now, =1/2*pi*fc where, fc =cut off frequency

=> approximate frequency=2*pi*fc/20

b) Since Time/Div calibrates scope horizontally, while Volts/Div calibrates scope vertically. So since you are measuring time, the time/div setting must be calibrated or known.

C) All the BNC ground wires ate directly connected to eac other to eliminate any stray signal from getting into the system. If all grounds are the same there can be no crosstalk.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.