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Signal sampling method and signal detection display system

A signal sampling and signal detection technology, applied in the direction of using digital measurement technology for measurement, etc., can solve the problems of difficult control and difficult to achieve.

Inactive Publication Date: 2004-02-04
RIGOL
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Problems solved by technology

The random sampling method is as follows: each group of sampling points is sampled at random time, which has nothing to do with the trigger. This sampling method is difficult to control and difficult to implement.

Method used

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  • Signal sampling method and signal detection display system
  • Signal sampling method and signal detection display system
  • Signal sampling method and signal detection display system

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Embodiment Construction

[0022] see figure 1 , 2, 3. The measured signal 9 is input to the attenuator and amplifier 1, after the frequency measurement unit 2 and the computer 4, the signal period T is obtained. The computer 4 calculates the sampling interval time ΔT, the sampling period nT±ΔT, and the sampling frequency f according to the T value H , And then send a control signal of nT±ΔT to the sampling signal generator 5 to control the sampling signal generator 5 to generate and provide accurate sampling signals to the A / D unit 6. The A / D unit 6 samples the output signals of the input attenuator and amplifier 1 according to the control pulses provided by the sampling signal generator 5, and stores the data of each sampling point in the buffer memory 7, and the computer 4 can sequentially read from the buffer memory 7 Read out the data, perform necessary processing, and then send it to the display to restore the waveform of the measured signal 9.

[0023] As shown in Figure 2, the signal generated by t...

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Abstract

The present invention discloses a signal sampling method and its signal detection display system, belonging to the field of electronic measurement and automatic test equipment manufacture technology. It is characterized by that the time interval of sampling points is nT plus or minus delta T (n can be 0,1,2,3 and the like), in which T is period of tested signal, and delta T=sT. S is greater than o and less than 1, and said sampling result can be inputted into computer, and processed. Said invented method and the equipment adopting said method can implement the measurement of high-frequency periodic signal and other treatment.

Description

Technical field [0001] A signal sampling method and a signal detection display system belong to the field of electronic measurement and automatic test instrument manufacturing. Background technique [0002] In the data acquisition system, the signal is measured in the time domain or frequency domain, mainly using A / D (analog to digital conversion) technology. According to the Sampling Theorem, the sampling frequency of a periodic signal should be greater than twice the highest frequency of the signal. In fact, the sampling frequency must be at least 10 to 20 times the signal frequency to give sufficient signal details. Therefore, when measuring high-frequency signals, strict requirements are put forward on A / D, and sometimes it is even impossible. In order to solve the above problems, low-speed A / D is used to measure signals with the highest possible frequency. Various sampling methods have been proposed. Two commonly used equivalent time sampling techniques are the ΔT method and...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 孙景琪
Owner RIGOL
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