JP2006101143A - Tv receiving amplifier device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To deal, using one kind of TV receiving amplifier device, with even a case wherein the number of antennas installed according to a radio wave environment is different. <P>SOLUTION: When broadcasting waves of wide-area broadcasting and prefectural area broadcasting all arrive from the same direction, received signals are input to an input terminal 31, and distributed signals of a distributor 33 are input to amplification units 34a to 34g, and also selected by changeover switches 36a to 36c and input to amplification units 35a to 35c. When the broadcasting waves of the wide-area broadcasting and prefectural area broadcasting all arrive from different directions, a received signal of the wide-area broadcasting is input to the input terminal 31 and a received signal of the prefectural area broadcasting is input to input terminals 32a to 32c and selected by changeover switches 36a to 36c. The amplification units 34a to 34g amplify prescribed channels of the wide-area broadcasting among the distributed TV signals. The amplification units 35a to 35c amplify prescribed channels of the prefectural area broadcasting among the TV signals selected by the changeover switches 36a to 36c. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a TV reception amplifying apparatus that receives terrestrial TV broadcasting, performs level adjustment, band limitation, etc. for each channel and outputs the result to a transmission line.

  In a TV reception and amplification apparatus that receives terrestrial TV (television) broadcasts, performs processing such as amplification and frequency conversion, and retransmits them to, for example, a joint reception facility using a CATV system, the received terrestrial TV broadcasts are received for each channel. In other words, the out-of-band signal is suppressed and the signal level is adjusted to a predetermined level and then output to the transmission line (see, for example, Patent Document 1).

  The terrestrial TV broadcast includes, for example, a wide-area broadcast that is transmitted from a shared antenna tower to a wide-area area, and a prefectural-area broadcast that is broadcast independently for each prefecture. The channel arrangement in each broadcasting area is almost constant. For example, about 7 broadcast waves are transmitted from a common antenna tower in wide area broadcasting, and one broadcasting wave is transmitted from the antenna of each broadcasting station in prefectural broadcasting. . In this case, in the prefectural broadcasting, usually a plurality of broadcasting stations, for example, about three broadcasting stations are provided.

  When the wide area broadcast and the prefectural broadcast are received at the same time, various connection states are conceivable for the connection between the TV receiving antenna and the TV reception amplifying device from the positional relationship between the shared antenna tower and the prefectural broadcast station.

  3 to 5 show connection examples of a TV antenna and a TV reception amplifying apparatus in the case of simultaneously receiving 7 wide-area broadcast waves and prefectural broadcasts transmitted from three locations.

  FIG. 3 shows a connection example in which broadcast waves of wide area broadcasting and prefectural area broadcasting all come from the same direction, and one signal line (cable) is used due to the installation location of the antenna and the TV reception amplification device. is there. In this case, broadcast waves of wide area broadcast and prefectural area broadcast are received by one TV antenna 11, and the received signal is input to the input terminal 21 of the TV reception amplification device 20. The TV receiving and amplifying device 20 distributes the received signal input to the input terminal 21 to the wide-area broadcast channel dedicated amplification units 23a to 23g and the prefectural broadcast channel dedicated amplification units 24a to 24c.

  The wideband broadcast amplifying units 23a to 23g select a preset wideband broadcast channel from the TV signals distributed by the distributor 22, and perform amplification, level adjustment, band limitation, frequency conversion, and the like. Perform processing. In addition, the prefectural broadcasting amplification units 24a to 24c select a preset prefectural broadcasting specific channel from the TV signals distributed by the distributor 22, and perform amplification, level adjustment, band limitation, frequency conversion, and the like. Perform the following process.

  FIG. 4 is an example of connection between the TV antenna and the TV reception amplifying apparatus when the broadcast waves of the wide area broadcast and the three prefectural area broadcasts all come from different directions. In this case, the TV antenna 11 for receiving the wide area broadcast and the three TV antennas 12a to 12c for receiving the prefectural area broadcast are installed in the direction of the transmitting antenna of each station. Then, a wide-area broadcast reception signal received by the TV antenna 11 is input to the first input terminal 21 a of the TV reception amplification device 20, and the prefectural broadcast reception signals received by the TV antennas 12 a to 12 c are input to the TV reception amplification device 20. Input to the second to fourth input terminals 21b to 21d.

  The TV reception amplifying apparatus 20 distributes the wide-area broadcast reception signal input to the first input terminal 21 a to the wide-area broadcast amplification units 23 a to 23 g by the distributor 22. Also, the TV reception amplification device 20 inputs the prefectural broadcast reception signals input to the second to fourth input terminals 21b to 21d to the prefectural broadcast amplification units 24a to 24c, respectively.

  The wide-area broadcast amplification units 23a to 23g select a specific wide-area broadcast channel from the TV signals distributed by the distributor 22, and perform amplification, level adjustment, and the like. The prefectural broadcast amplification units 24a to 24c select a specific prefectural broadcast channel from the TV signals input via the input terminals 21b to 21d, and perform amplification, level adjustment, and the like.

  FIG. 5 shows another example of connection between the TV antenna and the TV reception amplification device when the broadcast waves of the wide area broadcast and the three prefectural area broadcasts all come from different directions. In this case, the TV antenna 11 for receiving the wide area broadcast and the three TV antennas 12a to 12c for receiving the prefectural area broadcast are installed in the direction of the transmitting antenna of each station. Then, the reception signals of the TV antenna 11 for wide area broadcast reception and the TV antennas 12 a to 12 c for reception of the prefectural area broadcast are mixed by the mixer 13 and then input to the input terminal 21 of the TV reception amplification device 20.

  The TV reception amplification device 20 distributes the reception signal input to the input terminal 21 to the wideband broadcast amplification units 23 a to 23 g and the prefectural broadcast amplification units 24 a to 24 c by the distributor 22.

The wideband broadcast amplification units 23a to 23g perform amplification, level adjustment, and the like by selecting a preset specific wideband channel from the TV signals distributed by the distributor 22. In addition, the prefectural broadcast amplification units 24a to 24c select predetermined preset prefectural broadcast channels from the TV signals distributed by the distributor 22, and perform amplification, level adjustment, and the like.
JP 2003-309739 A

  As described above, when the wide area broadcast and the prefectural area broadcast are received simultaneously, the reception signal of the antenna is input to the TV reception amplification device 20 via the cable, but the arrival direction of the radio wave varies depending on the installation position of the TV reception amplification device 20. Therefore, there may be a case where only one antenna is required or a case where a plurality of antennas are required. In addition, the TV reception amplifying apparatus 20 needs to change the internal configuration of the device according to the number of antennas or antenna lines to be connected, or to mix the received signals of the antennas outside the device.

  However, in order to change the configuration of the equipment, it is necessary to grasp the radio wave environment of the place where it is installed in advance, that is, the number of antennas to be installed, etc., so it is difficult to change immediately before the installation work. In addition, in a place where the TV reception amplification device 20 is installed, work such as connecting a distributor or a mixer outside the device is very inefficient.

  The present invention has been made to solve the above-described problems, and even when the number of antennas to be installed differs according to the radio wave environment, it can be reliably handled without providing an external mixer or the like. An object of the present invention is to provide a TV reception amplification device.

  The present invention is a TV receiving and amplifying apparatus for receiving a terrestrial TV broadcast and amplifying each channel by a channel dedicated amplification unit for receiving a wide area / prefectural broadcast receiving a reception signal including a wide area broadcast or a wide area broadcast and a prefectural area broadcast. An input terminal, a prefectural broadcast receiving input terminal, a wide area broadcast dedicated channel amplification unit, a prefectural broadcast channel dedicated amplification unit, and a reception signal input to the wide area / prefectural broadcast receiving input terminal A distributor for distributing to the wide-area broadcast channel dedicated amplification unit and the prefectural broadcast channel dedicated amplification unit, a received signal distributed to the prefectural broadcast channel dedicated amplification unit by the distributor, and the prefectural broadcast reception The received signal input to the input terminal is switched to the channel-specific amplification unit for prefectural broadcasting. Characterized by comprising a changeover switch for.

  According to the present invention, even when the broadcast waves of the wide area broadcast and the prefectural area broadcast all come from the same direction and the broadcast wave is received by one TV antenna, or all the broadcast waves of the wide area broadcast and the prefectural area broadcast are all received. Even when the broadcast waves arrive from different directions and are received by different TV antennas, it can be easily handled by simply switching the changeover switch. Therefore, even when the number of antennas to be installed differs according to the radio wave environment, it is possible to cope with one type of TV reception amplification device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a basic circuit configuration diagram of a TV receiving and amplifying device 30 according to an embodiment of the present invention, and shows an example of simultaneously receiving seven wide-area broadcasts and prefectural broadcasts transmitted from three locations. Is.

  As shown in FIG. 1, the TV receiving and amplifying apparatus 30 has a wide area / prefectural broadcast receiving input terminal 31 to which a reception signal including wide area broadcast or wide area broadcast and prefectural broadcast is input, and a plurality of, for example, 3 Two input terminals 32a to 32c are provided. The input terminal 31 receives a wide-area broadcast TV signal received by a TV antenna or a TV signal including wide-area broadcast and prefectural broadcast. Also, the prefectural broadcast TV signals received by the TV antenna are input to the input terminals 32a to 32c.

  The TV signal input to the input terminal 31 is input to the distributor 33 and is distributed to the wide-area broadcast channel dedicated amplification units 34a to 34g and the prefectural broadcast channel dedicated amplification units 35a to 35c. In this case, the changeover switches 36a to 36c are provided between the distributor 33 and the prefectural broadcasting amplification units 35a to 35c. That is, the TV signal distributed by the distributor 33 is inputted to one input terminal a of the changeover switches 36a to 36c, and the TV signal of the prefectural broadcasting is inputted to the other input terminal b from the input terminals 32a to 32c. The The changeover switches 36a to 36c switch the TV signal input from the distributor 33 input to the input terminal a or the TV signal input from the input terminals 32a to 32c by the switch terminal c and input to the amplification units 35a to 35c. . The amplification units 34a to 34g and 35a to 35c are detachably provided.

  The amplifying units 34a to 34g for the wide area broadcast are set in advance so as to select a specific channel from 7 waves in the wide area broadcast. Accordingly, the wideband broadcast amplifying units 34a to 34g each select a specific wideband broadcast channel from the TV signals distributed by the distributor 33 and amplify the signal, for example, level adjustment, band limitation, frequency conversion, etc. After the above processing is performed, it is output to the mixer 37.

  In addition, the prefectural broadcast amplification units 35a to 35c are set in advance so as to select a specific prefectural broadcast. Accordingly, the prefectural broadcast amplification units 35a to 35c select the prefectural broadcast specific channels from the TV signals selected by the changeover switches 36a to 36c, respectively, amplify the signals, and adjust the level, band limitation, frequency, etc. After processing such as conversion, the data is output to the mixer 37.

  The mixer 37 mixes the TV signals of the respective channels output from the wideband broadcast amplification units 34a to 34g and the prefectural broadcast amplification units 35a to 35c, and outputs the mixed signals from the output terminal 38 to a transmission line such as a coaxial cable. .

  In the above configuration, as in the case of FIG. 3, when the broadcast waves of the wide area broadcast and the prefectural area broadcast all come from the same direction and the broadcast waves are received by one TV antenna (not shown), The TV signal received by the TV antenna is input to the input terminal 31 of the TV reception amplification device 30, and the switching terminals c of the changeover switches 36a to 36c are switched to the input terminal a side.

  In the above state, the broadcast waves of the wide area broadcast and the prefectural area broadcast received by the TV antenna are input from the input terminal 31 to the wide area broadcast amplification units 34a to 34g via the distributor 33, and further, the changeover switch 36a. Are input to amplification units 35a to 35c for prefectural broadcasts.

  The wide-area broadcast amplification units 34a to 34g each select a specific wide-area broadcast channel from the TV signals distributed by the distributor 33, and perform processing such as amplification, level adjustment, band limitation, and frequency conversion. Output to the mixer 37.

Further, the prefectural broadcast amplification units 35a to 35c select prefectural broadcast specific channels from the TV signals input from the distributor 33 via the changeover switches 36a to 36c, respectively, and amplify, adjust the level, and adjust the bandwidth. Processing such as restriction and frequency conversion is performed and output to the mixer 37.
The mixer 37 mixes the TV signals of the respective channels output from the wide-area broadcast amplification units 34a to 34g and the prefectural-area broadcast amplification units 35a to 35c, and outputs them from the output terminal 38 to an external transmission line.

  Similarly to the case of FIG. 4, when the broadcast waves of the wide area broadcast and the three prefectural broadcasts all come from different directions, although not shown, a TV antenna for wide area broadcast reception and a prefectural area broadcast reception wave are received. Three TV antennas are installed in the direction of the transmitting antenna of each station, and the TV signal received by the TV receiving antenna for wide area broadcast reception is input to the input terminal 31 of the TV reception amplifying device 30 for receiving the prefectural area broadcast. TV signals received by the three TV antennas are input to the input terminals 32 a to 32 c of the TV reception amplifying apparatus 30. And the switching terminal c of the changeover switches 36a-36c is switched to the input terminal b side, and the prefectural area broadcast signal input via the input terminals 32a-32c is selected.

  In the above state, the broadcast wave of the wide-area broadcast received by the TV antenna for wide-area broadcast reception is input from the input terminal 31 to the wide-area broadcast amplification units 34a to 34g via the distributor 33, and each of the specific channels has a specific channel. After being selected and subjected to processing such as amplification and level adjustment, it is output to the mixer 37.

  The TV signals received by the three TV antennas for receiving the prefectural broadcast are input from the input terminals 32a to 32c to the prefectural broadcast amplification units 35a to 35c via the changeover switches 36a to 36c, respectively. Is selected and subjected to processing such as amplification and level adjustment, and then output to the mixer 37.

  The mixer 37 mixes the TV signals of the respective channels output from the wide-area broadcast amplification units 34a to 34g and the prefectural-area broadcast amplification units 35a to 35c, and outputs them from the output terminal 38 to an external transmission line.

  According to the embodiment, the changeover switches 36a to 36c are provided, the TV signal distributed from the input terminal 31 via the distributor 33, and the prefectural broadcast TV input to the prefectural broadcast receiving input terminals 32a to 32c. Since the signal is selectively switched and input to the prefectural broadcast amplification units 35a to 35c, the broadcast waves of the wide area broadcast and the prefectural broadcast all come from the same direction. Even when receiving with a TV antenna, or even when broadcasting waves of wide-area broadcasting and prefectural broadcasting all come from different directions and receive each broadcasting wave with a different TV antenna, the changeover switches 36a to 36c. It is possible to easily cope with this by simply switching. Therefore, even when the number of antennas to be installed differs according to the radio wave environment, it is possible to cope with one type of TV reception amplification device.

Next, a specific configuration example of the TV reception amplification device 30 according to the present invention will be described with reference to FIG.
In the example shown in FIG. 2, an input terminal 31 for receiving wide / prefectural broadcasts and five input terminals 32a to 32e for receiving prefectural broadcasts are provided. A capacitor 41, a branching device 42, an attenuator 43, and a broadband amplifier 44 are provided in series between the input terminal 31 and the distributor 33. The signal branched by the branching device 42 is sent to a monitor terminal 45 for line input monitoring. The signals distributed by the distributor 33 are input to the wideband broadcast amplification units 34a to 34g, and are input to the prefectural broadcast amplification units 35a to 35e via the changeover switches 36a to 36e. The amplification units 34a to 34g and 35a to 35e are detachably provided.

  Capacitors 51a to 51e and branching devices 52a to 52e are provided in series between the input terminals 32a to 32e and the changeover switches 36a to 36e, respectively. The TV signals branched by the branching devices 52a to 52e are input to monitor terminals 53a to 53e for prefectural broadcast monitoring.

  The change-over switches 36a to 36e have two circuit contacts, and switch between the TV signal distributed by the distributor 33 and the TV signal of the prefectural broadcasting input via the input terminals 32a to 32e by the switch terminal. Although the signals are input to 35a to 35e, they are terminated by termination resistors 54a to 54j when the switching terminal does not select the TV signal.

  The output signals of the wideband broadcast amplification units 34a to 34g and the prefectural broadcast amplification units 35a to 35e are mixed by the mixer 37, and then passed through the wideband amplifier 55, the attenuator 56, the branching device 57, and the capacitor 58. Output from the output terminal 38. The broadband amplifier 55 is detachably provided and can be easily replaced when the performance deteriorates. Further, the signal branched by the branching device 57 is sent to the monitor terminal 60 through the capacitor 59. The monitor terminal 60 can monitor the output signal of the TV reception amplifier 30.

  In addition, a power supply unit 61 is provided in the TV reception amplification device 30. The power supply unit 61 converts an alternating current power supply (AC) supplied to the power supply terminal 62 into a predetermined direct current voltage and supplies it to the amplification units 34a to 34g and 35a to 35e as operation power.

  Further, an AC power supply (AC) is superimposed on a high frequency signal as necessary from an electronic device connected to the output terminal 38 and is input to the output terminal 38 via a high frequency coil 63 and a power supply line 64. 61. When AC power is supplied from the external electronic device to the output terminal 38, AC power is not supplied to the power terminal 62 of the power supply unit 61. When the AC power is supplied from an external electronic device through the output terminal 38, the power supply unit 61 converts the AC power (AC) into a predetermined DC voltage to convert the amplification units 34a to 34g and 35a to 35e. Is supplied as operating power.

  Further, the AC power supplied from the external electronic device to the power supply line 64 via the output terminal 38 and the high frequency coil 63 is further sent to the input terminal 31 via the switch 65 and the high frequency coil 66, and the switches 67a to 67a. 67e and high frequency coils 68a to 68e, and sent to the input terminals 32a to 32e. That is, when other electronic devices such as amplifiers are connected to the input terminals 31, 32a to 32e, the AC power can be supplied to the electronic devices in the previous stage by being selected by the switches 65 and 67a to 67e. .

  In the example shown in FIG. 2, even when the broadcast waves of the wide area broadcast and the prefectural area broadcast all come from the same direction as in the case of FIG. 1 and the broadcast waves are received by one TV antenna, Alternatively, even if the broadcast waves of the wide area broadcast and the prefectural area broadcast all come from different directions and each broadcast wave is received by a different TV antenna, it can be easily handled by switching the changeover switches 36a to 36e. .

  Moreover, in the example shown in FIG. 2, since the five prefectural broadcast receiving input terminals 32a to 32e are provided, up to five prefectural broadcasts can be handled. Furthermore, since the amplification units 35a to 35e are detachably provided, they can be mounted according to the number of prefectural broadcasts, that is, the number of TV antennas that receive the prefectural broadcasts.

  In addition, when the changeover switches 36a to 36e are switched in accordance with the radio wave environment in the area where the TV reception amplification device 30 is installed, a termination resistor is connected to the non-selection side switching terminal, which may cause signal reflection or the like. Therefore, stable operation can be performed.

  Further, since the monitor terminals 45 and 53a to 53e are provided on the signal lines of the input terminals 31, 32a to 32e and the monitor terminal 60 is provided on the signal output side, it is possible to monitor the input signal and the output signal, respectively. It is.

In the above embodiment, a case where seven channels of wide area broadcasting are provided has been described. However, other channel numbers can be handled in the same manner as in the above embodiment.
Further, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.

1 is a basic circuit configuration diagram of a TV reception amplification apparatus according to an embodiment of the present invention. It is a specific circuit block diagram of the TV reception amplification device in the same embodiment. It is a figure which shows the example of a connection of TV antenna and TV receiving amplification apparatus in the case of receiving simultaneously the prefectural area broadcast transmitted from the 7 conventional wide area broadcasts and three places. It is a figure which shows the example of a connection of TV antenna and TV receiving amplification apparatus in case the broadcast waves of the conventional wide area broadcast and three prefectural area broadcasts all come from different directions. It is a figure which shows the other example of a connection of TV antenna and TV reception amplification apparatus in the case where the broadcast waves of the conventional wide area broadcast and three prefectural area broadcasts all come from different directions.

Explanation of symbols

  30 ... TV reception amplifying device 31, 32a to 32e ... input terminal, 33 ... distributor, 34a to 34g ... channel dedicated amplification unit for wide area broadcast, 35a to 35e ... channel dedicated amplification unit for prefectural broadcast, 36a to 36e ... Switch, 37 ... Mixer, 38 ... Output terminal, 41 ... Capacitor, 42 ... Branch, 43 ... Attenuator, 44 ... Broadband amplifier, 45 ... Monitor terminal, 51a-51e ... Capacitor, 52a-52e ... Branch 53a to 53e ... monitor terminal, 54a to 54j ... termination resistor, 55 ... broadband amplifier, 56 ... attenuator, 57 ... branching device, 58, 59 ... capacitor, 59 ... capacitor, 60 ... monitor terminal, 61 ... power supply, 62 ... Power supply terminal, 63 ... high frequency coil, 64 ... power supply line, 65, 67a to 67e ... switch, 66, 68a ... 8e ... high-frequency coil.

Claims (1)

  In a TV receiving and amplifying apparatus that receives terrestrial TV broadcasts and amplifies each channel by a dedicated channel amplification unit, an input terminal for receiving wide area / prefectural broadcasts to which reception signals including wide area broadcasts or wide area broadcasts and prefectural broadcasts are input Prefectural broadcast receiving input terminal, wide area broadcast dedicated channel amplification unit, prefectural broadcast dedicated channel amplification unit, and reception signal input to the wide area / prefectural broadcast receiving input terminal To the channel dedicated amplification unit and the prefectural broadcasting channel dedicated amplification unit, the received signal distributed by the distributor to the prefectural broadcasting channel dedicated amplification unit, and the prefectural broadcast receiving input terminal Switching to switch the input received signal to input to the prefectural broadcasting channel dedicated amplification unit TV reception amplifier apparatus characterized by comprising a switch.

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