The functions of various blocks are:
1) CRT: This is cathode ray tube which emits electrons that strike phosphor screen internally to provide visual display of signal.
2) VERTICAL AMPLIFIER: This is a wideband amplifier used to amplify signals in the vertical section.
3) DELAY LINE: It is used to delay the signal for some time in vertical section.
4) TRIGGER CIRCUIT: This is used to convert the incoming signals into trigger pulses so that input signal & sweep frequency can be synchronized.
5) TIME BASE: It is used the saw tooth voltage required to deflect the beam in the horizontal section.
6) HORIZONTAL AMPLIFIER: This is used to amplify the saw tooth voltage before it is applied to horizontal deflection plates.
7) POWER SUPPLY: There are two power supplies a high voltage supply for CRT & low voltage supply for all circuits.