When testing, studying or adjusting electronic components, electronic circuits and equipment, in order to measure some electrical parameters of the circuit, such as measuring frequency response, noise coefficient, and voltmeter calibration, it is often necessary to provide electrical signals that meet the requirements and simulate the excitation signals of the equipment to be tested in the actual work. When measuring the steady-state characteristics of a system, a sinusoidal signal source with known amplitude and frequency is used. When testing the transient characteristics of the system, a rectangular pulse source with known leading edge time, pulse width and repetition period should be used. And the signal source output signal parameters, such as frequency, waveform, output voltage or power, etc., can be accurately adjusted in a certain range, with good stability, there are output instructions.And this kind of test signal source USES signal generator commonly.
Used to generate specific parameter for the circuit being measured electric testing signal, this design can produce variable frequency and amplitude of the square wave, sine sweep triangle wave, and through the simple and easy method to the output signal frequency and amplitude of adaptive adjustment and power and external load automatically adaptation, output signal parameters directly through the LCD display.
As a kind of adaptive control system, the signal generator can work according to the controlled object and its environment changes, the requirements of performance index compared with the performance of the actual system, according to information obtained, corresponding correction control laws or adjust the system parameters, the system can keep the optimal or optimization of working state, to obtain satisfactory performance.