KR20000037832A - System for remotely controlling and analyzing functions of television transmitter - Google Patents

Abstract

PURPOSE: A system for remotely controlling and analyzing functions of a television transmitter is provided to remotely control and analyze functions as measuring IF signal or RF signal outputted from the transmitter, and also analyzing function of each blocks of the transmitter. CONSTITUTION: A system for remotely controlling and analyzing functions of a television transmitter includes a modulating part(101), a frequency adjusting part(102), a vector signal analyzing part(110), a control circuit part(106), and a communication controlling part(111). The modulation part modulates an inputted broadcasting signal so as to be suitable to 8VSB method. The frequency adjusting part upward adjusts a frequency of a broadcasting signal outputted from the modulation part. The vector signal analyzing part analyzes a nonlinear degree for an output signal of the frequency adjusting part. The control circuit part performs a predetermined analyzing function with the modulation part or the frequency adjusting part, analyzes and stores a value of the performed result, and provides a nonlinear information provided from the vector signal analyzing part with the communication controlling part. The communication controlling part controls the control circuit part so as to monitor and control a large number of remote control and function analysis systems.

Description

TV transmitter remote control and performance analysis system

The present invention relates to a remote control and performance analysis system of a TV transmitter, and more particularly, to a remote control and performance analysis system suitable for remote control and performance analysis of a digital TV transmitter.

The conventional analog TV (TV) transmission system is composed of a studio transmission linker 11, which is an input device that receives video and audio signals from a studio, as shown in FIG. 1, and a transmitter (TX1-TXn) that actually transmits the signal. Can be classified as

The broadcast signal including the image signal and the audio signal output from the studio transmission linker 11 is input to the transmitters TX1 to TXn, modulated into an intermediate frequency signal by the modulation / frequency adjusting unit 12, and also an RF signal. Adjusted up to (Radio Frequency). The signal output from the modulation / frequency adjusting unit 12 is transmitted from the power amplifier 13 through an intermediate amplifier (IPA) 13a and a final amplifier (HPA: High Power Amplifier) 13b. -TXn) is synthesized by the Parallel Combine Equipment (Parallel Combine Equipment) and sent to the final antenna 18 is sent out. Here, the power supply unit 16 supplies power to all the transmitters TX1, the cooling unit 15 is for cooling the power amplification unit 13, and the control unit 14 measures the environment of the transmitter TX1. , A failure determination operation is performed, and the remote controller 19 controls the operation of the controller 14.

The transmission system of the conventional analog TV is interlocked through the studio connection linker 11, the plurality of transmitters TX1-TXn, and the antenna 18 as shown in FIG. The broadcast signal transmitted from the studio of the broadcasting station is input to the respective transmitters TX1-TXn via a Studio Transmitter Linker 11. Here, only one transmitter TX1 will be cited and described. In the modulation / frequency adjusting unit 12, which is the first part of the transmitters TX1 to TXn, the broadcasting signals are modulated into intermediate frequency signals and then mixed, and the mixed composite video signals are appropriate frequencies allocated according to broadcasting stations. Raised to RF (Radio Frequency) signal.

Since the level of the output signal of the modulation / frequency adjusting unit 12 is small in size, the intermediate power amplifier stage (IPA) 13a is responsible for amplifying the level to some extent. The intermediate amplified signal is greatly amplified in kW units at the final amplifier stage (HPA) 13b. The signals amplified and output from each transmitter TX1-TXn are then synthesized by the parallel synthesizer 17, and are output at high output through the antenna 18.

However, such a conventional TV transmission system uses a remote control device at a remote location to provide monitoring functions such as measuring the operating status of the equipment installed at the transmitting station, whether there is a failure, or measuring the environment inside the transmitting station. It only has the function of switching at cost. Thus, it was only possible to control the overall operation of the system, but the actual IF and RF signals had to go directly to the transmission station and make adjustments to improve measurement and performance. These disadvantages do not satisfy more detailed and various control functions when the conventional remote control system is applied to a digital TV transmission system.

In other words, when switching to a digital TV transmission system, the functions of the analog TV transmission system alone cannot monitor whether or not the calculation of digital data is performed correctly or control to perform the correct calculation. In addition, IF and RF signals output from the TV transmitter are output according to the regulations. If not, there is no control function to control the accurate output.

An object of the present invention has been made in view of the problems of the prior art mentioned above, by measuring the IF signal or RF signal output from the transmitter of the actual TV using a modem or the Internet, and for each block constituting the transmitter The purpose of the present invention is to provide a remote control and performance analysis system of a TV transmitter that can perform remote control and performance analysis of a digital TV transmitter by analyzing the performance.

According to an aspect of the present invention for achieving the above object, a modulator for modulating the broadcast signal input by the remote control and performance analysis system of the TV transmitter to suit the 8VSB method, and the broadcast signal output from the modulator A result of performing a preset analysis function with a frequency adjusting unit for adjusting the frequency of the signal, a vector signal analyzing unit analyzing the nonlinearity of the output signal of the frequency adjusting unit, and a modulating unit or the frequency adjusting unit. And a built-in control circuit unit for providing non-linear information provided from the vector signal analysis unit to the communication control unit, and the communication control unit controlling the control circuit unit to monitor and control a plurality of remote control and performance analysis systems. It is composed.

1 is a block diagram of a conventional remote control and performance analysis system.

Figure 2 is a block diagram of a remote control and performance analysis system according to the present invention.

FIG. 3 is a block diagram illustrating a modulator shown in FIG. 2. FIG.

* Description of the symbols for the main parts of the drawings *

101: modulator 102: frequency adjuster

103: power amplifier 104: power synthesis unit

105: cooling unit 106: control circuit unit

107: power supply 108: antenna

109: demodulator 110: vector signal analysis unit

111: communication control unit 201: data randomizer

202: Reed-Solomon encoder 203: data interleaver

204: Treris encoder 205: mux

206: pilot signal insertion unit 207: pre-equalizer filter

208 modulator 209 function analysis unit

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of a remote control and performance analysis system of a TV transmitter according to the present invention. Referring to FIG. 2, the remote control and performance analysis system of the TV transmitter modulates an input broadcast signal to be suitable for an 8VSB scheme, and adjusts a frequency of a broadcast signal output from the modulator 101. A frequency adjusting unit 102, a power amplifying unit 103 for amplifying the output signal of the frequency adjusting unit 102 at a predetermined amplification ratio, and a power for synthesizing an output signal of the power amplifying unit 103 and a signal transmitted from another transmitter The demodulation unit 104, the cooling unit 105 for cooling the heat generated by the power amplification unit 103 and the power synthesis unit 104, and the signal output from the frequency adjusting unit 102 is demodulated before radio transmission. Performs a predetermined analysis function with the demodulator 109, the vector signal analyzer 110 for analyzing the nonlinearity of the output signal of the demodulator 109, and the modulator 101 or the frequency adjuster 102. Analyze and embed the results obtained, the Beck The control circuit unit 106 for providing the non-linear information provided from the signal analysis unit 110 to the communication control unit 111 to be described later, and the control circuit unit 106 so that the operator monitors and controls a plurality of remote control and performance analysis systems. Is configured as a communication control unit 111.

Here, the modulator 101 includes a data randomizer 201 and a output signal of the data randomizer 201 for deforming continuous data in the broadcast signal input as shown in FIG. 3. The Reed-Solomon encoder 202 for coding an error signal, the data interleaver 203 for rearranging the output signal of the Reed-Solomon encoder 202, and the data output from the data interleaver 203 in symbol units The trellis encoder 204 to be converted, the segment synchronizing signal and the field synchronizing signal included in the broadcast signal to the mux 205 which synthesizes the output signal of the trellis encoder 204 and the output signal of the mux 205 A pilot signal insertion unit 206 for inserting a pilot signal for synchronization, a filter unit 207 for digitally filtering and nonlinearly correcting the output signal of the pilot signal insertion unit 206, and an output of the filter unit 207 signal VSB modulator 102 to modulate, data randomizer 201, Reed-Solomon encoder 202, data interleaver 203, trellis encoder 204, mux 205, pilot signal inserter 206 And optionally, a function analyzer 209 for communicating with each other to analyze each operation state.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS.

The 19.39 Mbps broadcast signal transmitted from the studio of the broadcasting station is modulated by the modulator 101 to fit the 8VSB data. That is, as shown in FIG. 3, after the input data is transformed using a specific circuit in a structure determined as a standard, an error correction function is provided through the Reed-Solomon encoder 202, and the data is again provided. Rearrange through data interleaver 203. Subsequently, two bits of data are made into one symbol consisting of 3 bits through a Treliss encoder 204. Then, in the MUX 205, a segment sync signal included in these signals and a broadcast signal is included. And field sync signals.

A pilot signal for synchronizing with the receiver, that is, the digital TV, is inserted into the data that has undergone such a process. Then, the pre-equalizer filter 207 uses a digital filtering and a high power amplifier for transmitting the output waveform. Non-linear corrections are made to compensate for non-linear components occurring at (HPA). Subsequently, the output signal of the pre-equalizer filter 207 is modulated by the VSB modulator 208 and transmitted to the frequency adjuster 102.

In the functional analyzer 209 illustrated in FIG. 3, the analysis data provided from the vector signal analyzer 110 and the result values when the complete operation for each block is input by inputting the data are embedded. Analyze each block (nonlinear correction, except VSB modulator) for correct operation. At this time, the function analysis unit 209 inputs the analysis data for each block and compares the results with each block to the data randomizer 201 and the analysis data for the non-linear correction and VSB modulation. It is possible to verify whether the result passed through the unit 101 has the correct value.

The verification result can be confirmed by the operator through the control circuit unit 106 at a remote location or at a transmitting station. The cooling unit 105 controls the cooling of the entire transmitter, measures the temperature, and transmits the information to the communication control unit 111 through the control circuit unit 106. The communication control unit 111 is composed of a modem 111 a, a telephone 111 b, and a PC 111 c.

Since the power supply unit 107 supplies power required for the transmission station and includes a preliminary generator, power is supplied through the preliminary generator due to the rapid control of the control device at the time of power failure.

The communication control unit 111 monitors and controls the operation state of the entire system through the control circuit unit 106 at the transmission station, performs analysis and monitors and controls the remote control using a modem or the Internet remotely. One of the two modes of the remote mode is connected to the circuit unit 106 and the transmitter is controlled through the control circuit unit 106 to check the operation of the entire system, perform analysis, and monitor and control the transmitter.

Here, the control circuit unit 106 performs communication between each module constituting the transmitter and the control circuit unit 106, and the analysis data for each block and the result value are stored.

The frequency adjuster 102 raises the signal output from the modulator 101 to the RF signal, and then the signal output from the frequency adjuster 102 is increased in each of the large power amplifier stages of the power amplifier 103, In the power synthesizer 104 is combined with the output signal of the other transmitter and transmitted through the antenna 108.

The vector signal analyzer 110 demodulates a signal immediately before being output from the input terminal of the antenna 108 to receive the input signal. The signal signal analyzing unit 110 uses a signal constellation, an eye diagram, and the like to deform the signal. The degree is displayed and the value is transmitted to the communication control unit 111 via the control circuit unit 106.

Using this measurement, the operator can correct and download the nonlinear correction information in the modulator 101 by downloading it by modifying the nonlinear correction information in the remote control unit via the modem or the Internet or directly using the control circuit unit 106 at the transmitting station. Make corrections possible.

According to the present invention as described above, in the digital TV transmission system according to the present invention, because the more detailed and various control functions are possible, the operational state of the blocks constituting the transmitter by connection via a modem or the Internet not only at the transmitting station but also at the remote site. It can be verified and controlled, and it can also be monitored to perform the calculation of digital data correctly or to perform the correct calculation.

Also, to verify that IF and RF signals are output according to the regulations, it is not necessary to take the instrument (Vector Signal Analyzer, Spectrum Analyzer) directly to the transmitter and measure it. There is a number.

Claims (6)

A modulator for modulating the input broadcast signal to conform to the 8vsb method; A frequency adjusting unit for upwardly adjusting the frequency of the broadcast signal output from the modulator; A vector signal analyzer for analyzing the nonlinearity of the output signal of the frequency adjuster; A control circuit unit for analyzing and embedding a result value performed by performing a preset analysis function with the modulator or frequency adjusting unit, and providing non-linear information provided from the vector signal analyzer to a communication controller; And a communication control unit configured to control the control circuit unit so that an operator monitors and controls a plurality of remote control and performance analysis systems. The apparatus of claim 1, wherein the modulator comprises: a data randomizer for transforming an input broadcast signal so that continuous data does not appear; An encoder for coding to correct an error signal included in an output signal of the data renderer; A data interleaver for rearranging the output signal of the encoder; A trellis encoder for converting data output from the data interleaver in symbol units; A mux for synthesizing the segment synchronization signal and the field synchronization signal included in the broadcast signal with an output signal of the trellis encoder; A pilot signal insertion unit for inserting a pilot signal for synchronizing with the output signal of the mux; A filter unit for digitally filtering and nonlinearly correcting an output signal of the pilot signal inserting unit; A VSB modulator for modulating an output signal of the filter unit; Remote control and performance analysis system of a TV transmitter, characterized in that the data analyzer, encoder, data interleaver, trellis encoder, mux, the pilot signal insertion unit and the functional analysis unit for analyzing each operation state selectively. The method of claim 2, wherein the function analyzer selectively inputs the analysis data provided from the vector signal analyzer to the data randomizer, Reed-Solomon encoder, data interleaver, trellis encoder, mux, and pilot signal inserter. A remote control and performance analysis system for a TV transmitter, characterized in that it stores a result value when each operation is complete and analyzes whether each operation state is correct. The system of claim 2, wherein the result value analyzed by the function analyzer is input to the data randomizer to verify whether the result passed through the modulator has an accurate value. 2. The remote control and performance analysis of a TV transmitter according to claim 1, wherein the monitoring and control of the entire remote control and performance analysis system is performed by control of a control circuit unit by an input of the operator through the communication control unit. system. The TV transmitter as claimed in claim 1, wherein the monitoring and control of the entire remote control and performance analysis system is performed by the operator by controlling the control circuit unit through the communication control unit using a modem or the Internet at a remote location. Remote control and performance analysis system.