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Digital spectrum analyzer and method for fast positioning of measuring signals

A spectrum analyzer and digital spectrum technology, applied in the field of spectrum analyzers, can solve the problems that users do not know the input signal frequency and energy, measurement difficulties, etc., and achieve the effect of simplified structure, low cost, accurate measurement of signal positioning and analysis

Active Publication Date: 2011-06-29
RIGOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in most cases the user does not know the frequency and energy of the input signal
In this case it becomes difficult for the user to measure

Method used

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  • Digital spectrum analyzer and method for fast positioning of measuring signals
  • Digital spectrum analyzer and method for fast positioning of measuring signals
  • Digital spectrum analyzer and method for fast positioning of measuring signals

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] figure 1 It is a block diagram of the circuit structure of the digital spectrum analyzer. As shown in the figure, the digital spectrum analyzer mainly includes: CPU, radio frequency circuit, AD converter, display and keyboard.

[0042] The CPU is the main controller of the spectrum analyzer, and is used to control and manage the running state of the entire spectrum analyzer system. One of the channels controls the radio frequency circuit and adjusts the modulation of the radio frequency circuit to be measured. The other channel receives the measurement signal mixed by the radio frequency circuit, analyzes and calculates the measurement signal through an algorithm, and displays the calculated signal waveform on the display.

[0043] The radio frequency circuit is mainly used for frequency and amplitude processing of the signal to be measured, ...

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Abstract

The invention provides a digital spectrum analyzer and a method for fast positioning of measuring signals. The digital spectrum analyzer is additionally provided with an A / D (analog / digital) converter on a line on which a signal is sent from a radio-frequency circuit to a CPU (central processing unit), so that a frequency mixing signal emitted by the radio-frequency circuit is converted into a digital signal, and then frequency spectrum analysis is carried out on the converted digital signal by the CPU. Therefore, in the invention, large quantity of unnecessary simulation auxiliary appliance elements can be omitted, the complexity and the design cost of the circuit are reduced, and simultaneously, the speed of the CPU for signal processing also can be increased. In addition, by designing for the measuring signal positioning method of the digital spectrum analyzer, a user can finish positioning analysis of measured signals fast and accurately still without need of knowing the probable ranges of the frequency and the amplitude of the measuring signals in advance.

Description

technical field [0001] The invention relates to a digital spectrum analyzer and a method for quickly locating and measuring signals thereof, belonging to the technical field of spectrum analyzers. Background technique [0002] Spectrum analyzer is a comprehensive instrument, widely used in microwave communication, radar, navigation, electronic countermeasures, space technology, satellite ground station, frequency management, signal monitoring, EMI diagnosis, EMC measurement, etc. It analyzes the measurement signal to display the frequency and power of the measurement signal on the display. Spectrum analyzers generally fall into two types. One is a frequency sweep tuning analyzer, which is a superheterodyne adjustable preselection receiver, which can analyze the signal or the intermediate frequency signal converted from the signal. It has a high measurement frequency range. When users put forward higher requirements for measuring frequency range, sensitivity and other indi...

Claims

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Application Information

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IPC IPC(8): G01R23/16
Inventor 王悦王铁军李维森
Owner RIGOL
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