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Digitlization field intensity meter applied to digital video broadcasting

A technology of digital video broadcasting and field strength meter, which is applied in the direction of TV, equipment, cable transmission adaptation, etc., can solve the problem of single function of TV field strength meter, and achieve the effect of high cost performance

Inactive Publication Date: 2017-06-27
CHENGDU HONGSHAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the function of the TV field strength meter is single, and the purpose is to provide a digital field strength meter applied to digital video broadcasting, simplify the structure of the field strength meter, and enrich the functions of the TV field strength meter

Method used

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  • Digitlization field intensity meter applied to digital video broadcasting

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Embodiment

[0016] Such as figure 1 As shown, the digitized field strength meter applied to digital video broadcasting includes an attenuator, a low-pass filter, a first mixer, a first band-pass filter, a second amplifier, a second mixer, and a second band-pass filter, second amplifier, third mixer, third bandpass filter, logarithmic amplifier, envelope detector, active low-pass filter, microprocessor, display, first crystal oscillator, first phase-locked loop, second phase-locked loop, second crystal oscillator, third phase-locked loop, third crystal oscillator, analog-to-digital converter, peak detector, keyboard, the attenuator, low-pass filter, the first a mixer, a first bandpass filter, a second amplifier, a second mixer, a second bandpass filter, a second amplifier, a third mixer, a third bandpass filter, a logarithmic amplifier, The envelope detector, the active low-pass filter, the microprocessor, and the display are connected in sequence, the first crystal oscillator is connecte...

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Abstract

The present invention discloses a digitlization field intensity meter applied to digital video broadcasting. The digitlization field intensity meter comprises an attenuator, a low pass filter, a first mixer, a first band pass filter, a second amplifier, a second mixer, a second band pass filter, a second amplifier, a third mixer, a third band pass filter, a logarithmic amplifier, an envelope detector, an active low-pass filter and a microprocessor which are connected in order. The digitlization field intensity meter applied to digital video broadcasting is a cable television field intensity meter taking a microprocessor as core, combines existing features of the same type of products, adds more measurement functions and refers to the principle of a frequency spectrum analyzer to develop a portable multifunctional field intensity meter with high cost performance on the premise of cost control.

Description

technical field [0001] The invention relates to a field strength meter, in particular to a digitized field strength meter applied to digital video broadcasting. Background technique [0002] In the cable TV system, in order to ensure clear images and sound signals, it is necessary to measure the field strength of the TV signal at the CATV terminal. Apart from expensive spectrum analyzers and other specialized instruments, there are very few portable, multifunctional field strength meters. [0003] With the development of TV technology, information processing technology and microelectronics technology, field strength meters at home and abroad are now developing towards multifunctional functions. The original field strength meters can only measure the level of analog TV signals. The new field strength meters not only It is required to be able to measure the level value of the analog TV signal. With the acceleration of the digitization process of cable TV, the level value of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00H04N7/10G01R19/00G01R23/16
CPCH04N17/004G01R19/0084G01R23/16H04N7/10
Inventor 黄友华
Owner CHENGDU HONGSHAN TECH