ES2349600A1 - Equipment and procedure for measurement of radio and/or television signals. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Measurement equipment for radio and/or television signals, which measures different types of tv signal (dvbt, dvbc, dvbs and dvbs2), which has means that display simultaneously in the same presentation screen of a a television channel, previously tuned, of a list of measurements made on that same channel, of a portion of frequency spectrum centered on that channel and of a spectrum portion of the adjacent channels and is constituted by at least one rf block ( 1), digital processor (2), demodulator block (8), microprocessor (4), and memory (3). The measurement procedure performs the simultaneous visualization on the same screen of presentation of a television channel, of a list of measurements made on that channel, of the frequency spectrum centered on that channel and of the spectrum of the adjacent channels. (Machine-translation by Google Translate, not legally binding)

Description

Equipment and signal measurement procedure radio and / or television.

The present invention relates to equipment and a procedure for measuring radio and / or television signals, which performs measurements of different types of TV signal (DVBT, DVBC, DVBS and DVBS2), which simultaneously displays on the same screen presentation the tuned television channel (DVBT, DVBC, DVBS and DVBS2), the measurements made on that same channel, the spectrum frequency centered on that channel and the spectrum of the channels adjacent.

The portable equipment used for the Checking the quality of TV and radio signals, are based usually in the demodulation of radio channels located in spectrum frequencies between 5 MHz and 2.5 GHz. This signal is used to measure different parameters (C / N, BER, CBER, etc.), the measure of the quality of the displayed signal or the frequency response of the tuned channel.

In the first field meters, it made measurements on the tuned television channel and He had the possibility to visualize the television signal. Plus later the visualization of the spectral response of the tuned channel, display that was presented on the screen of vertical and always exclusive with the channel display Tuned.

The spectral occupation in a distribution of collective type (ICT infrastructure) is growing, both in number of channels used, as in type of signals (analog, digital COFDM, QAM, QPSK). This variety and quantity of channels It implies greater dedication, both at work and time measure, as in checking the quality of the installation and subsequent generation of reports certifying said installation.

Currently, in addition to having a high occupancy density of the frequency band assigned by the regulator, in a multitude of ICT the designer places different channels and redistributes them trying to maximize the use of the width of band available. The problem associated with this intensive use of bandwidth appears through interference between different channels, due to the nature of the distribution network (single channels, mixers, bandpass filters etc.); or the shift of a tone on an unwanted frequency, ...

The objective of the present invention is the implementation of a portable computer, powered by batteries, which take measurements to characterize different types of TV signal (DVBT, DVBC, DVBS and DVBS2), and display simultaneously on the same presentation screen the television channel tuned (DVBT, DVBC, DVBS and DVBS2), the measurements made on that same channel, the frequency spectrum centered on that channel and that of adjacent channels.

This goal is achieved with a team of measured as defined in the claims.

This team has the advantage of obtaining in "real time" of all available information on the channel demodulated: image display, spectrum display radio used for the transmission of the TV signal, in addition to displaying the necessary bandwidth for transmission of adjacent channels, along with measures of signal quality depending on its nature, that is, depending of the band and the type of modulation used. The determination of Signal quality is transparent to the user, since the only thing to take into account is the frequency or tuning channel, with the consequently improvement in time and availability of equipment at the time of characterizing an installation.

Simultaneous display of all this information gives the user a global perspective of the entire process, allowing you to identify problems associated with the intensive use of available bandwidth, different network problems distribution used, and its possible effects on the quality of the signal or image

The invention has a plurality of advantages.

An example of signal measuring equipment Radio and / or, which measures different types of TV signal (DVBT, DVBC, DVBS and DVBS2) is characterized in that it displays simultaneously a channel of presentation on the same presentation screen television (DVBT, DVBC, DVBS and DVBS2), previously tuned, a list of measures taken on that same channel, a portion of frequency spectrum centered on that channel and a portion of spectrum of adjacent channels. This has the advantage of allow to visualize at the same time all the characteristics of the channel measured.

In another example according to the invention the equipment of measurement of radio and / or Television signals constituted by a Block RF, a Low-Pass Filter, a Converter Analog / Digital, a Digital Processing Module, a Microprocessor and a Memory.

In another example according to the invention the equipment of measure has a battery system that feeds the equipment. This has the advantage of allowing its use in places where there are no connection points to the power grid such as roofs, roofs, turrets ... etc.

In an example according to the invention the procedure for measuring radio and television signals for measurement of different types of TV signal (DVBT, DVBC, DVBS and DVBS2) is characterized in that it performs the Simultaneous display on the same screen of presentation of: a television channel (DVBT, DVBC, DVBS and DVBS2), previously: tuned in, from a list of measures performed on that same channel, of a portion of centered frequency spectrum in that channel and adjacent channels.

In another example according to the invention the measurement procedure of radio and television signals is characterized in that the measurement procedure consists of less than Next steps.

.- Channel selection and parameters entered by the user.

.- Selection of the type of measures to be carried out,

.- Channel tuning,

.- Automatic selection of optimal attenuation for the correct display of the channel and for making measurements.

.- Calculation of the spectrum of the channel,

.- Realization of the measures according to the type of tuned channel, and obtaining the spectrum of the channel by block (2),

.- Presentation of all information in a way simultaneous on the same screen

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The equipment for measuring radio signals and / or Television according to the invention carries out the realization of measurements, channel display and presentation of the channel spectrum tuned and adjacent channels simultaneously and in "real time" without delays or progressive updates.

The equipment for measuring radio signals and / or Television according to the invention performs the automatic selection of a input attenuator for measurements, display of the channel and spectrum calculation together. The team of measurement of radio and / or television signals according to the invention Identify the measurement channel and select the parameters of the Next channel present in the band.

The following is described based on the figures a non-limiting example of an embodiment of the equipment according to the invention.

Figure 1 shows a diagram of the equipment according to the invention.

Figure 2 shows the presentation of the information on the device according to the measure

As you can see in Figure 1, Equipment (E) is constituted by an RF Block (1), a Block of Digital Processing (2), a Memory (3), a Microprocessor or Microcontroller (4), a User Interface (keyboard) (6), a Display Screen (7), a Battery System (5) and a Demodulator Block (8).

The RF Block (1) recovers the input signal (one or several Television channels in DVBT, DVBC, DVBS or DVBS2), and transforms it to a different frequency band than the input band

In the Digital Processing Block (2) it is calculated the spectral response in an environment of the tuned frequency and the information is sent to the microprocessor (4). This block is the core of the process system, since it allows mathematical calculation by means of fast Fourier transforms (FFT) of the signal number provided by the digital analog converter (ADC).

The Demodulator Block (8) performs the correct demodulation of the RF signal and sends the information of the demodulation performed to the microprocessor (4), and the video signal to the display block (7).

The microprocessor or microcontroller (4) is the Team control core (E) and the person in charge of managing the other elements Using a program loaded in memory (3), the microprocessor (4) executes the described functions and presents the results on a presentation screen (7) where it is displayed of Simultaneously on the same screen, all the information on the tuned television channel (DVBT, DVBC, DVBS and DVBS2), the measurements made on that same channel, the frequency spectrum centered on that channel and the spectrum of adjacent channels.

A user interface (6) allows, in a way automated, control and extract the information of the Equipment (E) of measure to present it to the user or transmit it to another device.

The team also has a system of batteries (5) which is also managed by the microcontroller (4).

The measurement is performed with processing techniques digital signal (PDS), so that the signal, after being filtered pass-band in the RF frequency band in The RF Block (1), is tuned to Fl and analyzed in real time in frequency, time, type of modulation, etc., using the Digital Processing Block (2).

Figure 2 shows the representation of the entire information simultaneously on the same screen (7). How it can be seen on said screen (7) it is displayed Simultaneously the tuned channel (71), the spectral response of the tuned signal and adjacent channels (72) and measurements of tuned channel (73), both spectrum measurements and measures obtained from the demodulation of the channel.

The equipment measurement procedure begins with the choice by the user through the interface of user (6) of the frequency or channel to be tuned. About this value the display is made on the presentation screen (7) of the channel, depending on the type of TV signal (analog or digital), modulation (COFDM, QAM, QPSK) and signal parameters. To the at the same time the measurements of the signal are extracted and the spectrum and to perform the measurement chosen describes the procedure used for the capture, calculation and presentation of information on the display device (7).

\hbox{siguientes
funciones:}

The team carries out the measurement procedure that is based on the sequential execution of the

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functions:} 

.- Channel selection and parameters entered by the user.

.- Selection of the type of measures to be carried out, differentiating between analog and digital.

.- Channel tuning, using the video carrier to focus on an analog channel or the center frequency for a digital channel.

.- Automatic selection of optimal attenuation for the correct display of the channel and for making measurements.

.- Calculation of the spectrum of the channel, with fixed SPAN of 20 Mhz for the terrestrial band and 50 Mhz for the satellite band, using the RF signal supplied by (1) once the attenuation control

.- Realization of the measures according to the type of tuned channel, and obtaining the spectrum of the channel through block (2), applying digital processing techniques, like the FFT, DFT algorithms, in real time.

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la figura 2:}

-Presentation of all information simultaneously on the same screen, as shown

 \ hbox {en
Figure 2:} 

one.

Channel Display Tuned

2.

Spectral response display of the tuned signal and adjacent channels.

3.

Display of channel measurements tuned, both spectrum measures and measurements obtained from the demodulation of the channel.

Reference List

AND

Team

one

RF block

2

Digital Processing Block

3

Memory

4

Microprocessor or microcontroller

5

Battery system

6

User interface

7

Visual display

71

Tuned channel display

72

Display of the spectral signal response tuned and adjacent channels

73

Display of channel measurements Tuned

8

Demodulator Block

Claims (5)

1. Measuring equipment for radio and / or Television signals, which measures different types of TV signals (DVBT, DVBC, DVBS and DVBS2) characterized in that it has means that simultaneously display the same screen. presentation of a television channel (DVBT, DVBC, DVBS and DVBS2), previously tuned, of a list of measurements made on that same channel, a portion of the frequency spectrum centered on that channel and a portion of the spectrum of the channels adjacent. 2. Measuring equipment for radio and / or Television signals, according to claim number one characterized in that the means that perform the visualization simultaneously on the same display screen of a television channel (DVBT, DVBC, DVBS and DVBS2) , previously tuned, of a list of measurements made on that same channel, of a portion of frequency spectrum centered on that channel and of a portion of spectrum of adjacent channels is constituted at least by: an RF Block (1), Digital Processor (2), a Demodulator Block (8), a Microprocessor (4), and a Memory (3). 3. Equipment for measuring radio and / or television signals, according to any of the preceding claims, characterized in that it has a battery system (5) that feeds the equipment. 4. Procedure for measuring radio and television signals for the measurement of different types of TV signal (DVBT, DVBC, DVBS and DVBS2) characterized in that it performs simultaneous visualization on the same display screen of a channel television (DVBT, DVBC, DVBS and DVBS2), previously tuned, of a list of measurements made on that same channel, of a portion of frequency spectrum centered on that channel and a portion of spectrum of adjacent channels. 5. Measurement procedure of radio and television signals according to claim number 4 characterized in that the measurement procedure is carried out consists of at least the following steps. .- Channel selection and parameters entered by the user. .- Selection of the type of measures to be carried out, .- Channel tuning, .- Automatic selection of optimal attenuation for the correct display of the channel and for making measurements. .- Calculation of the spectrum of the channel, .- Realization of the measures according to the type of tuned channel, and obtaining the spectrum of the channel by block (2), .- Presentation of all information in a way simultaneous on the same screen, (7).