Electron transmitter is the most important part of an oscilloscope. Cathode in the CRT (Cathode Ray Tube) will emit electrons to electrodes CRTmelalui screen pemfokus electron beam intensity is determined by the number of electrons emitted by the cathode. Light-reflecting material on the CRT screen can be obtained from sulphide, oxide atausilikat of cadmium, which is activated by additional material from silver, gold or copper.
Generally have a green tint to the light display on a CRT screen, because the human eye is generally sensitive to this color.
a. Vertical amplifier
Vertical amplifier can provide the voltage up to 100 V. This amplifier must be able to amplify DC voltage or AC with the same reinforcement. Measurement signals can be adjusted via buttons POS (position).
b. input Y
Part Input-Y (Vert. Input) connected with tombolpembagi voltage, for dividing the voltage to be measured, with a ratio of 10: 1 or 100: 1. This button should be assisted by a signal box for compensation.
c. Horizontal boosters:
This amplifier has two inputs, one of the sweep generator, generating trace (sweep) horizontally through the CRT and the other input amplifies external signal and displayed on CRT only on the horizontal axis. Horizontal axis scale on the CRT oscilloscope, used to measure the time (period) of the signal being measured, for example, 2 ms / division.
Generator generates a sawtooth signal, the frequency can be set, dengancara set period through TIMEBASE button. CRT will display the measured signal (input signal) only if the period of the signal is exactly the same as the period sawtooth signal or a multiple of the period.
e. Triggering and time bias
Sawtooth signal will start to appear if there is a trigger signal. At the time of the input signal passes the trigger level, the sawtooth signal began to appear.
f. Power supply
The power supply’s performance greatly affects the performance of other parts of the oscilloscope. The power supply is not regulated properly will cause an error pengukurandan not look good on a CRT (focus, brightness / brightness, sensitivity, and so forth).
g. Digital oscilloscope
In digital oscilloscopes, which shall be displayed all data stored in RAM. Sinyalanalog will be sampling and dikuantisasioleh ADC, rated (binary) in accordance with the magnitude of the amplitude tersampling (Figure 8:38). This value can be displayed back directly on a CRT screen or PC monitor via RS-232 connecting cable. The difference between analog and digital oscilloscope only the ADC signal processors.
Steering the electron beam on the oscilloscope is the same as the electron beam steering in analog oscilloscopes. No digital oscilloscope equipped with mathematical software for signal analysis or printer. Digital oscilloscope, comprising:
• ADC (Analog-to-Digital Converter)
• DAC (Digital-to-Analog Converter)
• Electronic Storage