Autoset
button. A yellow trace should appear.
Autoset
. What is the time/div now?
You can now use the oscilloscope to explore the mystery circuit. Save screenshots of each test then make a sketch showing how the various waveforms are related in time.
Autoset
button, two waveform should appear, one above the other.
You can now proceed to measure TL, TH and T as you vary R4, R5 or C and populate a table with the results. You can then determine the scaling constants k1 and k2.
Use the multimeter to re-measure the resistors more precisely. Use the Component Tester to measure the capacitors and assume a 1% measurement error.
Autoset
button to view the two waveforms, as shown.
We note that the observed pulse waveform seem to repeat with a period T that consists of a low level time TL and a high level time TH, so that T=TL+TH.
Note that since the transitions of the two waveforms seem to occur at the same time, you can place the cursors more accurately using the square wave as reference.
For each measurement of TL, or TH as shown, check that the cursors and the cursor data are displayed and that the correct values of R4, R5, C are entered in the variables frame.
Save the data set (click 'File', 'Save data') and a screenshot of every trial.
From a Linux workstation, save distinctly labelled files in:
/work/2P30/2023-2024/yourBrockID/Lab#.