Using electron beam oscilloscope is the deflection reproduce the instantaneous image signal of a kind of instrument. Not only can the voltmeter, ammeter, power meter to measure signal amplitude, frequency and phase can be like the test plan, plan, frequency and phase signal cycles, But also can test the modulated signal parameter estimation, the signal nonlinear distortions, etc.
Y channel is by the Y axis attenuator and Y amplifier part, in order to adapt to the observation of different amplitude signals. The X-ray scanning circuit is one can continuously produce periodic linear oscilloscope voltage of sawtooth wave generator. In order to see a screen test signal waveform, must make sawtooth wave voltage signal cycles to cycle is an integer times. The function of synchronous circuit diagram is used to force sawtooth wave satisfy requirement of voltage of the cycle. Among them, "" synchronization is using the signal is forcing synchronization. "Outside" synchronization is using the external force with the voltage. X input channels and an external input (X), it can expand oscilloscope function, observe Y = f (X) of the figure. Such as measuring the volt-ampere characteristics, and the motor torque characteristics, etc.
Another oscilloscope and power systems, auxiliary control circuit (brightness, focus, and vertical and horizontal displacement, etc) and oscilloscope power and correction signal etc. Correction signal generator is used to produce the frequency and amplitude are fixed continuous square-wave (amplitude, frequency of 0.5 V 1KHz), with the X axis and Y axis calibration of the scale.

The use of oscilloscope
1 oscilloscope measure currents
We need a high precision, small resistance and is known not measured after voltage resistor, according to the current measurements converted ohm's law.

2 oscilloscope measuring voltage
(1) were measured with low frequency signal can be adopted: probe. If the signal amplitude is lesser, now with low sensitivity can probe direct use shielded wire oscilloscope Y input and test points.
(2) were measured with high frequency signals than using probe, shielded wire or cable distortion, high precision. But testing cable length by distance will probe, with its sensitivity to probe the attenuation and fell. General measure frequency can be used when the coaxial cable.
Measuring ac voltage, measure the ac voltage waveform is usually the peak voltage or two differences. The results calculated by measuring the potential difference between two points being measured. Plug the screen was measured between two vertical deflection distance multiplied by the Y axis, which measured by deflection sensitivity of the differences between the two.
Used to measure dc voltage, frequency response from dc oscilloscope to begin. First, adjust the vertical displacement scan button in a horizontal line as zero level line scale, the input voltage to be measured signals measured from zero offset scan the vertical distance level, which is measured dc voltage = vertical deflection distance * Y deflection sensitivity x probe attenuation coefficient.

3 oscilloscope measurement waveform
Oscilloscope level in scanning switch position fine-tuning calibration, the scale of the scanning switch, says screen level calibration represents the time value. Therefore oscilloscope can directly measured the waveform (or any part of the waveform.

4 oscilloscope measure frequency
Available time measurement method of frequency.

5 oscilloscope measure phase
For double trace oscilloscope, screen display in the oscilloscope, two light according to coordinate measuring the two light tracing scale about some distance between the measured distance, will be converted to phase.