1. Vertical amplifier strengthens the input signal applied to vertical depleting plates 2. Trigger circuit gives input to time base circuit 3. The output of time base generator is amplified by horizontal amplifier and then applied to horizontal deflecting plates of CRT 4. CRT consists of electron gun assembly which include thermally heated cathode, accelerating anode, focusing anode 5. The electron beam coming out from electron gun assembly enters to deflecting plates. 6. The screen of CRT internally coated with Phosphors material on which we observe waveform of the input signal.