Block diagram of CRO The below fig gives the block diagram of a CRO. A CRO consists of the following main blocks. 1. Cathode Ray Tube (CRT) 2. Vertical amplifier 3. Delay line 4. Trigger circuit 5. Time-base generator 6. Horizontal amplifier 7. High / low voltage supply. Pic 1 Block Diagram of CRO CRT is the heart of the CRO. It produces visual pattern on its screen. An electron gun assembly produces a sharp beam of electrons which is accelerated and made to strike fluorescent screen. On the other side of this screen, a small visual spot is produced. In this journey from the electron gum, the electron beam passes through a pair of vertical deflecting plates and another pair of horizontal deflecting plates. The vertical deflecting pl...