1. Oscilloscope

2. Sweep generator

3. t TIME/DIV Sweep

4. Trigger Fault

6. Trigger Sawtooth Trigger generation

7. Trigger Sawtooth Positive trigger level

8. Trigger Sawtooth Negative trigger level

9. Trigger Sawtooth Part of the signal: less than one period Hold-on time

10. Trigger Sawtooth Part of the signal: more than one period

11. Dual Trace oscilloscope Use a single-beam (one electron gun). Time-multiplex the inputs. – Chop mode or Alternate mode. Chopped mode: during the same sweep period, alternate between the two input signals. (better for slow sweep, i.e. high period) Alternate mode: one sweep period for each signal. ( better for fast sweep, i.e. low period)

13. X-Y mode X Y V y =A sin( t) V x =A sin ( t+θ)