What is the difference between adjusting the volts/div dial on the oscilloscope and adjusting the amplitude on the function generator (they both appear to stretch or compress the displayed waveform vertically)?
Adjusting the volts/div dial on the oscilloscope: changes the movements of the sine waves (but not noticeable)
Adjusting the amplitude on the function generator: changes the voltage (decrease or increase the actual voltage of the electrical signals.
What is the difference between adjusting the sec/div dial on the oscilloscope and adjusting the frequency on the function generator (they both appear to stretch or compress the displayed waveform horizontally)?
Adjusting the sec/div dial on the oscilloscope: changing what the electrical signal looks like on the screen across time but does not change the signal
Adjusting the frequency on the function generator: changes the number of cycle per seconds shown on the oscilloscope but changes the signal]
Discuss how to most accurately make measurements of amplitude and period from an oscilloscope (with reference to the volts/div and sec/div settings). Hint: try measuring the period accurately with many cycles of the waveform present.
To measure the peak-to-peak amplitude and period of three different signals, count the divisions (voltage/divisions & seconds/divisions) and multiply by the range or timebase setting
2 v/div (y-axis) & 100 s/div (x-axis)
y-axis: 3.5 x 2 = 7V
x-axis: 10 x 100 = 1000 ms = period
freq. = 1/period
freq. = 1000/1000
= 1 Hz
Calculate the frequency of the waveforms you observed from the period you measured. (Be careful not to forget the multiplier [milli or micro] when punching the numbers into your calculator). Do the frequencies approximately agree with the readings from the function generator frequency control?
use the frequency formula f = 1/T -> T =1/f
conversion 1Hz (1 cycle per sec) -> 1kHz (1000 cycle)
T = 1/f = 1/10,000 sec
F= 10 kHz = 0.001 sec
= 0.1 ms (distance between amplitude)
6.5 Assume you want to observe a 10 kHz sinewave with an amplitude of 0.05 volts. What settings for volts/div and time base would be most appropriate, if you wanted to see at least 2 complete cycles of the waveform?
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