1. Practical Guidelines for Using CRO

2. Panel of the CRO

3. Preliminary Adjustment
Before making any measurement, ground the CRO.
Turn the “Position” knob so that the trace is at the centre (or at the bottom if required).

4. Connection Connect the CRO terminal to the component concerned.
Unearth the Y-input and select DC or AC mode as instructed.
The Earth terminal of the CRO should be connected to the Earth terminal of the circuit.
The black terminal is the earth

5. Adjustment of Sensitivity
Adjust the sensitivity so that the trace does not exceed the CRO screen.
This knob should be turned fully clockwise.

6. Adjustment of Timebase
Adjust the timebase so that one or two complete cycles can be observed on the CRO screen.
This knob should be turned fully clockwise.

7. Exercise 1
The following screen is seen on the CRO. What should we adjust in order to get an observable trace on the screen?
A. Decrease the sensitivity
B. Increase the sensitivity
C. Decrease the speed of timebase
D. Increase the speed of timebase

8. Exercise 1 You are Wrong. Try Again. See Solution.
The Mission Covenant Church Holm Glad College

9. Congratulations! You are right!

10. Solution to Exercise 1
In this case, the trace exceed the upper and lower boundary of the screen. So, we should decrease the sensitivity of the Y-input.
The Mission Covenant Church Holm Glad College

11. Exercise 2
The following screen is seen on the CRO. What should we adjust in order to get an observable trace on the screen?
A. Decrease the sensitivity
B. Increase the sensitivity
C. Decrease the speed of timebase
D. Increase the speed of timebase
The Mission Covenant Church Holm Glad College

12. Exercise 2
You are Wrong.
Try Again.
See Solution.

13. Congratulations! You are right!
The Mission Covenant Church Holm Glad College

14. Solution to Exercise 2
In this case, not even one cycle was observed on the screen. So, the timebase must be too fast and we have to decrease the speed of the time base.