Cathode ray oscilloscope
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cathode ray oscilloscope. tube photograph. tube diagram. y plates. x plates. anode. heater supply. -. +. phosphor screen. H.T. supply. electron gun photograph. summary. electron gun produces a beam of electrons. light produced on the screen by electron beam.

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Presentation Transcript


Tube diagram
tube diagram

y plates

x plates

anode

heater supply

-

+

phosphor screen

H.T. supply



Summary
summary

electron gun produces a beam of electrons

light produced on the screen by electron beam

a p.d. across the y plates deflects the trace vertically

a p.d. across the x plates deflects the trace horizontally

y plates

x plates

anode

heater supply

-

+

phosphor screen

H.T. supply



Peak voltage
peak voltage

Peak p.d. = 3 Divisions x 1.0 mV/div = 3.0 mV


Period frequency
period & frequency

period = 4.0 divisions x 1.0 ms/div = 4.0 ms

frequency = 1 / period

frequency = 1 / 0.004 s

frequency = 250 Hz