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Signal generator Creating the necessary parameters of electrical test equipment signals. According to signal waveforms can be divided into sinusoidal signal, function (waveform) signal, pulse signal and random signal generator, such as four groups. Sinusoidal signal sinusoidal signal generator, the main circuit and system for measuring the frequency characteristics of nonlinear distortion, gain and sensitivity. According to the frequency of coverage is divided into low-frequency signal generator, high-frequency signal generator and microwave signal generator; by output level adjustment range can be divided into simple and stable signal generator (that is, signal source), standard signal generator (output Power can accurately -100 dB attenuation to milliwatts or less) and power signal generator (output power up to more than tens of milliwatts); by way of the frequency change is divided into tuner signal generator, sweep signal generator, program-controlled signal generator and frequency synthesizer, such as signal generator. Low-frequency signal generator including audio (200 ~ 20,000 Hz) and video (1 Hz to 10 MHz) range of sine wave generator. Main vibration level tends to be used RC-type oscillator, beat frequency oscillator can also be used. In order to facilitate the testing system frequency characteristics require output amplitude-frequency characteristic calm waveform distortion small. High-frequency signal generator frequency of 100 kHz to 30 MHz high-frequency, 30 ~ 300 MHz VHF signal generator. Generally tuned LC-type oscillator, the frequency can be tuned capacitors dial scale read out. The main purpose is to measure a variety of technical indicators receiver. Output signal can be used internal or external low-frequency sinusoidal AM or FM signal, so that the carrier frequency output voltage can be attenuated to 1 micro-volt below. Standard signal generator (Figure 1 diagram of the standard signal generator) output signal level accurate readings, the increase in the rate of transfer or offset meter can also read out. In addition, the equipment there to prevent signal leakage good shielding. Microwave signal generator from the UHF band up to millimeter-wave signal generator. Signal is usually distributed parameter resonator with the ultra-high frequency transistors and reflex klystron, but are gradually being microwave transistor, FET and Gunn diodes and other devices to replace the solid trend. Generally rely on mechanical devices tuned cavity to change the frequency of each can cover an octave or so, coupled by the cavity of the signal power of up to 10 mW or more generally. Simple signal source can be added only 1,000 square Joseph AM, and the standard signal generator is able to adjust the output level benchmarks to 1 mW, and then from behind with the attenuator signal level read out the decibel milliwatts value; also must There are internal or external rectangular pulse amplitude modulation, in order to test radar receiver. Sweep and program-controlled signal generator frequency sweep signal generator can produce a constant rate, the frequency of a limited scope for changes in the linear signal. In the high-frequency and high frequency bands with low-frequency scanning voltage or current control oscillation circuit components (such as varactor or core coil) to achieve the oscillation frequency sweep; early adopters in the microwave tuning voltage swept by changing the backward wave helix DC voltage electrodes to change the oscillation frequency, and later widely used in magnetic tuning sweep to YIG ferrite microwave solid ball for tuning oscillator circuit, by scanning the magnetic field to change the DC current control of the resonant frequency of the ball. Sweep sweep signal generator with automatic, manual, program-controlled and far-control and other work.Frequency synthesizer signal generator signal generator that is not directly produced by the oscillator, but high stability crystal oscillators as a standard frequency source, the use of frequency synthesis technology required for the formation of arbitrary frequency signal, with the standard frequency the source of the same frequency accuracy and stability. Output signal frequency is usually 10 digits may choose a maximum capacity of 11 high-resolution digital. In addition to manually select the frequency of use can also be programmed and far outside the control can also be carried out step-style sweep, suitable for automatic test systems. Direct frequency synthesizer by the crystal oscillation, addition, multiplication, such as filtering and amplification circuit, but quickly transform frequency circuit complexity, the maximum output frequency can only be reached around 1000 MHz. More use of indirect frequency synthesizer is to use the standard frequency source through the control of electrical tuning oscillator phase-locked loop (in the loop at the same time to achieve frequency doubling, frequency and mixer), to produce and export a variety of the required frequency signal. This synthesizer can reach the highest frequency of 26.5 GHz. High stability and high-resolution frequency synthesizer, with a variety of modulation functions (AM, FM and PM), plus zoom, steady increases and attenuation circuit, they constitute a new type of high-performance, can be programmed the synthesized signal generator, but also as a phase-locked-type sweep generator(仅供参考)

Signal generator Creating the necessary parameters of electrical test equipment signals. According to signal waveforms can be divided into sinusoidal signal, function (waveform) signal, pulse signal and random signal generator, such as four groups. Sinusoidal signal sinusoidal signal generator, the main circuit and system for measuring the frequency characteristics of nonlinear distortion, gain and sensitivity. According to the frequency of coverage is divided into low-frequency signal generator, high-frequency signal generator and microwave signal generator; by output level adjustment range can be divided into simple and stable signal generator (that is, signal source), standard signal generator (output Power can accurately -100 dB attenuation to milliwatts or less) and power signal generator (output power up to more than tens of milliwatts); by way of the frequency change is divided into tuner signal generator, sweep signal generator, program-controlled signal generator and frequency synthesizer, such as signal generator. Low-frequency signal generator including audio (200 ~ 20,000 Hz) and video (1 Hz to 10 MHz) range of sine wave generator. Main vibration level tends to be used RC-type oscillator, beat frequency oscillator can also be used. In order to facilitate the testing system frequency characteristics require output amplitude-frequency characteristic calm waveform distortion small. High-frequency signal generator frequency of 100 kHz to 30 MHz high-frequency, 30 ~ 300 MHz VHF signal generator. Generally tuned LC-type oscillator, the frequency can be tuned capacitors dial scale read out. The main purpose is to measure a variety of technical indicators receiver. Output signal can be used internal or external low-frequency sinusoidal AM or FM signal, so that the carrier frequency output voltage can be attenuated to 1 micro-volt below. Standard signal generator (Figure 1 diagram of the standard signal generator) output signal level accurate readings, the increase in the rate of transfer or offset meter can also read out. In addition, the equipment there to prevent signal leakage good shielding. Microwave signal generator from the UHF band up to millimeter-wave signal generator. Signal is usually distributed parameter resonator with the ultra-high frequency transistors and reflex klystron, but are gradually being microwave transistor, FET and Gunn diodes and other devices to replace the solid trend. Generally rely on mechanical devices tuned cavity to change the frequency of each can cover an octave or so, coupled by the cavity of the signal power of up to 10 mW or more generally. Simple signal source can be added only 1,000 square Joseph AM, and the standard signal generator is able to adjust the output level benchmarks to 1 mW, and then from behind with the attenuator signal level read out the decibel milliwatts value; also must There are internal or external rectangular pulse amplitude modulation, in order to test radar receiver. Sweep and program-controlled signal generator frequency sweep signal generator can produce a constant rate, the frequency of a limited scope for changes in the linear signal. In the high-frequency and high frequency bands with low-frequency scanning voltage or current control oscillation circuit components (such as varactor or core coil) to achieve the oscillation frequency sweep; early adopters in the microwave tuning voltage swept by changing the backward wave helix DC voltage electrodes to change the oscillation frequency, and later widely used in magnetic tuning sweep to YIG ferrite microwave solid ball for tuning oscillator circuit, by scanning the magnetic field to change the DC current control of the resonant frequency of the ball. Sweep sweep signal generator with automatic, manual, program-controlled and far-control and other work. Frequency synthesizer signal generator signal generator that is not directly produced by the oscillator, but high stability crystal oscillators as a standard frequency source, the use of frequency synthesis technology required for the formation of arbitrary frequency signal, with the standard frequency the source of the same frequency accuracy and stability. Output signal frequency is usually 10 digits may choose a maximum capacity of 11 high-resolution digital. In addition to manually select the frequency of use can also be programmed and far outside the control can also be carried out step-style sweep, suitable for automatic test systems. Direct frequency synthesizer by the crystal oscillation, addition, multiplication, such as filtering and amplification circuit, but quickly transform frequency circuit complexity, the maximum output frequency can only be reached around 1000 MHz. More use of indirect frequency synthesizer is to use the standard frequency source through the control of electrical tuning oscillator phase-locked loop (in the loop at the same time to achieve frequency doubling, frequency and mixer), to produce and export a variety of the required frequency signal. This synthesizer can reach the highest frequency of 26.5 GHz. High stability and high-resolution frequency synthesizer, with a variety of modulation functions (AM, FM and PM), plus zoom, steady increases and attenuation circuit, they constitute a new type of high-performance, can be programmed the synthesized signal generator, but also as a phase-locked-type sweep generator

Signal generator Parameters required to generate electrical signals in the test apparatus. According to the signal can be divided into sine wave signal, function (wave) signals, pulse signals and random signal generator, and other four major categories. Sinusoidal signal generator sinusoidal signal of the main circuit and systems used to measure the frequency characteristics of the nonlinear distortion, and gain sensitivity and so on. According to the frequency of coverage is divided into low-frequency signal generator, high-frequency signal generator and microwave signal generator; by adjustable output level and scope of the stability is divided into simple signal generator (that is, the signal source), the standard signal generator (output Power accurate attenuation to -100 dB the following mW) power and signal generator (up to tens of milliwatts output power above); according to the frequency of changes in the way of tuning into signal generator, the sweep signal generator program Signal generator and synthesizer signal generator, and so on. Including the low-frequency audio signal generator (200 ~ 20,000 Hz) and video (1 Hz to 10 MHz) of the scope of the sine wave generator. Vibration level with the general RC-oscillator-frequency oscillator can also be poor. In order to facilitate the testing of the system frequency characteristics of the output requirements of moderate amplitude waveform distortion small. High-frequency signal generator frequency of 100 kHz to 30 MHz frequency, 30 MHz to 300 very high frequency signal generator. The general use of LC-tuned oscillator frequency tuning capacitor can be the degree of scale to read out the set. The main purpose is to measure a variety of technical indicators receiver. Output signal can be internal or external low-frequency sine AM or FM signal, so that the carrier frequency output voltage to decay to below 1 V microcontroller. Standard signal generator (Figure 1 standard signal generator diagram) of the output signal level accurate readings, the increase in the rate of transfer or shift can also read the meter. In addition, there are instruments to prevent the leakage of good signal shielding. Microwave signal generator from the UHF band up to the millimeter-wave signal generator. Usually with the distribution of signals from the cavity parameters of the ultra-high frequency transistors and reflex klystron, but have been gradually microwave transistor, FET and Gunn diodes, and other devices to replace the solid trend. General machinery equipment by tuning cavity to change the frequency of each cover an octave or so, the body cavity by coupling a signal to the general power of up to 10 milliwatts or more. Simple source can only add 1,000 square He AM, and the standard signal generator is able to adjust the output level to the base 1 mW, and then from behind with the attenuator read out the signal level of the value of the decibel milliwatts; must also There are internal or external rectangular pulse amplitude modulation, in order to test the radar receiver, and so on. Sweep and program-controlled signal generator sweep signal generator can produce a constant rate, the frequency of a limited scope for changes in the linear signal. In the high-frequency and high frequency bands with low-frequency scanning voltage or current control oscillation circuit components (such as varactor coil or core) to achieve the oscillation frequency sweep; paragraph early in the microwave using tuning voltage sweep, change the backward wave helix The electrode voltage direct current to change the oscillation frequency, and later widely used in magnetic tuning sweep to YIG ferrite ball solid microwave oscillator for the tuning circuit, DC current control by scanning the magnetic field to change the ball's resonant frequency. Sweep sweep signal generator with automatic, manual, program-controlled and well-controlled manner, and so on. Synthetic-frequency signal generator signal generator that is not directly produced by the oscillator, but rather on the high stability crystal oscillators as a standard frequency source, the use of synthesizer technology required for the formation of any frequency signal, with frequency standards The same source frequency accuracy and stability. Output signal frequency can usually choose to decimal numbers, to a maximum of 11-digit high resolution. In addition to manually select the frequency of use and far outside the program can also be controlled, can also be carried out step-by-step class-sweep for ATS. Direct frequency synthesizer by the crystal oscillator, addition, multiplication, such as filtering and amplification circuit, but the rapid transformation frequency circuit complexity, the maximum output frequency can only be reached around 1000 MHz. Used more indirect frequency synthesizer is the source through the use of standard frequency tuning oscillator phase locked loop power control (in the loop at the same time be able to achieve in the octave, and the frequency mixer), to produce and export a variety of the To be the signal frequency. This synthesizer of the highest frequency of up to 26.5 GHz. High stability and high-resolution frequency synthesizer, with multi-function modulation (AM, FM and PM), together with the enlarged, and the steady increase attenuation circuit, it will constitute a new type of high-performance, the program Synthesized signal generator, but also as a lock-in-sweep generator