JP4430446B2 - Broadcast signal measuring device - Google Patents

Broadcast signal measuring device Download PDF

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JP4430446B2
JP4430446B2 JP2004108243A JP2004108243A JP4430446B2 JP 4430446 B2 JP4430446 B2 JP 4430446B2 JP 2004108243 A JP2004108243 A JP 2004108243A JP 2004108243 A JP2004108243 A JP 2004108243A JP 4430446 B2 JP4430446 B2 JP 4430446B2
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voltage
satellite
satellite antenna
tuner
polarization
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JP2005295270A (en
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正明 長瀬
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Maspro Denkoh Corp
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本発明は,衛星アンテナと衛星放送受信用のチューナーとの間の伝送線路に設けられて,衛星アンテナから出力された受信信号の大きさを測定する放送信号測定装置に関する。 The present invention relates to a broadcast signal measuring device that is provided on a transmission line between a satellite antenna and a tuner for satellite broadcast reception and measures the magnitude of a received signal output from the satellite antenna .

従来,衛星アンテナには,衛星放送受信用のチューナーから供給される直流電圧の値に応じて受信電波の偏波を切換可能なものが知られている。しかし,従来の放送信号測定装置には,衛星放送受信用のチューナーから衛星アンテナに送られた直流電圧の測定を行い,その結果を表示する機能が備えられていなかった。(例えば,特許文献1参照) Conventionally, satellite antennas that can switch the polarization of received radio waves according to the value of a DC voltage supplied from a tuner for receiving satellite broadcasts are known. However, the conventional broadcast signal measuring device does not have a function of measuring the DC voltage sent from the satellite broadcast receiving tuner to the satellite antenna and displaying the result. (For example, see Patent Document 1)

特開平08−023286号公報Japanese Patent Application Laid-Open No. 08-023286

このため,従来の放送信号測定装置では,衛星アンテナを動作させながら,衛星放送受信用のチューナーから衛星アンテナに送られている電圧値を知ることができなかった。
また,衛星アンテナにて受信される電波の偏波を切り換えるために衛星放送受信用のチューナーから衛星アンテナに送られている電圧値が適正か否かを確認することができないという問題があった。
For this reason, the conventional broadcast signal measuring device cannot know the voltage value sent from the satellite broadcast receiving tuner to the satellite antenna while operating the satellite antenna.
In addition, there is a problem that it is impossible to confirm whether or not the voltage value sent from the satellite broadcast receiving tuner to the satellite antenna is appropriate for switching the polarization of the radio wave received by the satellite antenna .

本発明は,こうした問題に鑑みなされたものであり,衛星アンテナを動作させながら,衛星放送受信用のチューナーから衛星アンテナに送られた直流電圧の値を容易に知ることができる放送信号測定装置を提供することを目的とする。 The present invention has been made in view of these problems, and provides a broadcast signal measuring apparatus that can easily know the value of a DC voltage sent from a satellite broadcast receiving tuner to a satellite antenna while operating the satellite antenna. The purpose is to provide .

かかる目的を達成するためになされた請求項1に記載の発明は,
衛星放送受信用のチューナーから供給される直流電圧の値に応じて受信電波の偏波を切り換える衛星アンテナと,前記衛星放送受信用のチューナーとの間の伝送線路に設けられ,前記衛星アンテナから出力された受信信号の大きさを測定して表示部に表示する放送信号測定装置において,
前記衛星放送受信用のチューナーから前記衛星アンテナへ送電された前記直流電圧の電圧値を測定して,その測定した電圧値が,前記衛星アンテナにて受信電波の偏波を第1偏波に設定可能な第1電圧範囲内若しくは第2偏波に設定可能な第2電圧範囲内にあるか,各電圧範囲から外れているかを判定し,その判定結果に基づき,前記測定した電圧値を,前記第1電圧範囲及び前記第2電圧範囲と共に前記表示部の電圧表示領域に模式的に表示する電圧判別回路を備えたことを特徴とする。
The invention described in claim 1 made to achieve such an object,
Provided on a transmission line between a satellite antenna for switching the polarization of a received radio wave according to the value of a DC voltage supplied from a tuner for satellite broadcast reception and the tuner for satellite broadcast reception, and output from the satellite antenna In a broadcast signal measuring device that measures the size of a received signal and displays it on a display unit ,
The voltage value of the DC voltage transmitted from the tuner for satellite broadcast reception to the satellite antenna is measured, and the measured voltage value sets the polarization of the received radio wave to the first polarization at the satellite antenna. It is determined whether it is within the first voltage range that can be set or within the second voltage range that can be set to the second polarization, or out of each voltage range, and based on the determination result, the measured voltage value is A voltage discriminating circuit that schematically displays in the voltage display area of the display unit together with the first voltage range and the second voltage range is provided.

本発明の放送信号測定装置によれば,電圧判別回路が,衛星放送受信用のチューナーから衛星アンテナへ送電された直流電圧の電圧値を測定して,その測定した電圧値が,衛星アンテナにて受信電波の偏波を第1偏波に設定可能な第1電圧範囲内若しくは第2偏波に設定可能な第2電圧範囲内にあるか,各電圧範囲から外れているかを判定し,その判定結果に基づき,測定した電圧値を,第1電圧範囲及び第2電圧範囲と共に表示部の電圧表示領域に模式的に表示する。According to the broadcast signal measuring apparatus of the present invention, the voltage discriminating circuit measures the voltage value of the DC voltage transmitted from the satellite broadcast receiving tuner to the satellite antenna, and the measured voltage value is measured by the satellite antenna. It is determined whether the polarization of the received radio wave is within the first voltage range that can be set to the first polarization, the second voltage range that can be set to the second polarization, or out of each voltage range. Based on the result, the measured voltage value is schematically displayed in the voltage display area of the display unit together with the first voltage range and the second voltage range.
このため,本発明の放送信号測定装置によれば,衛星アンテナが動作している状態で,衛星放送受信用のチューナーから衛星アンテナに送られている電圧値が第1電圧範囲若しくは第2電圧範囲の適正範囲内にあるか否かを容易に確認することができ,延いては,衛星放送受信用のチューナーの動作の確認や途中の伝送線路の不具合の有無の確認ができる。  Therefore, according to the broadcast signal measuring apparatus of the present invention, the voltage value sent from the satellite broadcast receiving tuner to the satellite antenna is in the first voltage range or the second voltage range while the satellite antenna is operating. Therefore, it is possible to easily check whether the transmission range is within the proper range, and it is possible to check the operation of the tuner for receiving satellite broadcasts and whether there is a problem with the transmission line on the way.
また,衛星放送受信用のチューナーから衛星アンテナに送られる直流電圧値と電圧範囲との表示によって,衛星アンテナでの偏波の切換状態を確認することもできる。  In addition, the polarization switching state at the satellite antenna can be confirmed by displaying the DC voltage value and voltage range sent from the satellite broadcast tuner to the satellite antenna.

以下に,本発明を具体化した実施形態の例を,図面を基に詳細に説明する。
Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.

図1は本発明に係る放送信号測定装置のブロックダイヤグラムである。
はじめに,衛星アンテナから衛星放送受信用のチューナーへ送られる受信信号の流れを説明する。衛星アンテナから放送信号測定装置1の入力端子2に,1576MHzから2040MHzの高周波信号(以下高周波信号と表す)が受信信号として送られる。
放送信号測定装置1の入力端子2には,直流電圧に重畳された高周波信号と直流電圧を分離するための入力側電源分離フィルター3が接続されている。
入力側電源分離フィルター3を経た衛星アンテナからの高周波信号は,信号分配器4により分配され,一方は高周波測定回路7に入力され,もう一方は直流電圧に重畳された高周波信号と直流電圧とを分離するための出力側電源分離フィルター5に入力される
高周波測定回路7の内部には増幅器や検波器等が備えられ,衛星アンテナから衛星放送受信用のチューナーへ送られた高周波信号についてその強さやC/N等の測定をする。高周波測定回路7から出力された測定の結果は,液晶パネルや発光ダイオードなどで構成される表示部10で表示される。
また,分配器4から出力側電源分離フィルター5に出力された高周波信号は,出力側電源分離フィルター5を経て放送信号測定装置1の出力端子6に出力される。
FIG. 1 is a block diagram of a broadcast signal measuring apparatus according to the present invention.
First, the flow of the received signal sent from the satellite antenna to the tuner for satellite broadcast reception will be described. A high-frequency signal (hereinafter referred to as a high-frequency signal) from 1576 MHz to 2040 MHz is sent as a reception signal from the satellite antenna to the input terminal 2 of the broadcast signal measuring apparatus 1.
The input terminal 2 of the broadcast signal measuring apparatus 1 is connected to an input side power source separation filter 3 for separating the high frequency signal superimposed on the DC voltage and the DC voltage.
The high-frequency signal from the satellite antenna that has passed through the input-side power supply separation filter 3 is distributed by the signal distributor 4, one is input to the high-frequency measurement circuit 7, and the other is the high-frequency signal superimposed on the DC voltage and the DC voltage . The output side power supply separation filter 5 for separation is input .
The high frequency measurement circuit 7 includes an amplifier, a detector, and the like, and measures the strength, C / N, etc. of the high frequency signal sent from the satellite antenna to the tuner for receiving satellite broadcasts. The measurement result output from the high-frequency measurement circuit 7 is displayed on the display unit 10 composed of a liquid crystal panel, a light emitting diode, or the like.
The high frequency signal output to the output side power separation filter 5 from the distributor 4 is outputted to the output terminal 6 of the broadcast signal measuring device 1 through the output side power separation filter 5.

次に,衛星放送受信用のチューナーから衛星アンテナに供給される直流電圧の流れについて説明する。
放送信号測定装置1の出力端子6には,衛星放送受信用のチューナーから,衛星アンテナに備えられた周波数変換器の電源を供給するための直流電圧が供給される。この電圧には2つの状態があり,その電圧の状態により,衛星アンテナに備えられた周波数変換器が受信する垂直または水平の偏波を選択する。衛星放送受信用のチューナーから出力される直流電圧をVTとすると,例えば,第1の状態として9.5V<VT<12.0V,第2の状態として13.5V<VT<16.5Vが用いられる。第1の状態は垂直偏波を指定し,第2の状態は水平偏波を指定している。
出力側電源分離フィルター5で分離された直流電圧は入力側電源分離フィルター3に接続され,放送信号測定装置1の入力端子2を経て衛星アンテナへ送られる。
出力側電源分離フィルター5で分離された直流電圧は,基準電圧発生回路12で作られた基準電圧とともに,電圧判別回路11に入力される。基準電圧を基にして,電圧判別回路11では電圧の状態を判別する。
例えば,基準電圧として,9.5V,12.0V,13.5V,16.5Vを設ける。第1の状態として9.5V<VT<12.0V,第2の状態として13.5V<VT<16.5V,第3の状態としてそれ以外の電圧条件を設定する。判別回路11に入力された電圧はこれらの状態のいずれかに判別され,その結果が表示部に表示される。また,電圧判別回路11は電圧計の機能も備えており,出力側電源分離フィルター5で分離された直流電圧の値をそのまま表示部10に表示させることもできる。
図2は表示部10に表示された例を示す。
そして,出力側電源分離フィルター5で分離された直流電圧の出力は電源部13にも接続される。電源部13は高周波測定回路7や表示部10等を動作させるための電源電圧を作り,それぞれの回路に供給している。
Next, the flow of DC voltage supplied from the satellite broadcast receiving tuner to the satellite antenna will be described.
The output terminal 6 of the broadcast signal measuring apparatus 1 is supplied with a DC voltage for supplying power to a frequency converter provided in the satellite antenna from a satellite broadcast receiving tuner. This voltage has two states, and the vertical or horizontal polarization received by the frequency converter provided in the satellite antenna is selected according to the voltage state. If the DC voltage output from the tuner for satellite broadcast reception is VT, for example, 9.5V <VT <12.0V is used as the first state, and 13.5V <VT <16.5V is used as the second state. It is done. The first state specifies vertical polarization, and the second state specifies horizontal polarization.
The DC voltage separated by the output side power source separation filter 5 is connected to the input side power source separation filter 3 and sent to the satellite antenna through the input terminal 2 of the broadcast signal measuring device 1.
The DC voltage separated by the output side power supply separation filter 5 is input to the voltage discrimination circuit 11 together with the reference voltage generated by the reference voltage generation circuit 12. Based on the reference voltage, the voltage discrimination circuit 11 discriminates the voltage state.
For example, 9.5V, 12.0V, 13.5V, and 16.5V are provided as reference voltages. 9.5V <VT <12.0V is set as the first state, 13.5V <VT <16.5V is set as the second state, and other voltage conditions are set as the third state. The voltage input to the discrimination circuit 11 is discriminated in any of these states, and the result is displayed on the display unit. The voltage discrimination circuit 11 also has a voltmeter function, and can display the value of the DC voltage separated by the output side power supply separation filter 5 on the display unit 10 as it is.
FIG. 2 shows an example displayed on the display unit 10.
The output of the DC voltage separated by the output side power supply separation filter 5 is also connected to the power supply unit 13. The power supply unit 13 generates a power supply voltage for operating the high-frequency measurement circuit 7 and the display unit 10 and supplies the power supply voltage to each circuit.

衛星放送受信用のチューナーから衛星アンテナに送られている直流電圧の値を変えて,受信する偏波を選択する方式の衛星アンテナを使用する場合,衛星放送受信用のチューナーから衛星アンテナに送られた電圧値によって,衛星アンテナから出力されるそれぞれの偏波の受信信号は切り換えられる。
例えば,チューナーから衛星アンテナに送られた電圧値VTが第1の状態(9.5V<VT<12.0V)のときには,衛星アンテナで受信した垂直偏波の信号が出力され,チューナーから衛星アンテナに送られた電圧値VTが第2の状態(13.5V<VT<16.5V)のときには衛星アンテナで受信した水平偏波の信号が出力される。図2の表示例ではチューナーから衛星アンテナに送られた電圧値VTが第2の状態(13.5V<VT<16.5V)であることを示している。
このように,本実施例の放送信号測定装置1では,チューナーから衛星アンテナに送られた電圧値がどの電圧の状態であるかを判別するとともに,チューナーから衛星アンテナに指定している偏波の種類を直接読み取ることもできる。
また,チューナーから衛星アンテナに送られた電圧値が適正でない場合や,途中の伝送線路の電圧降下が大きくて,チューナーで指定した電圧の状態にならない場合も一目で確認することができる。
When using a satellite antenna that selects the polarized wave to be received by changing the DC voltage value sent from the satellite broadcast receiving tuner to the satellite antenna, it is sent from the satellite broadcast receiving tuner to the satellite antenna. Depending on the voltage value, the received signal of each polarization output from the satellite antenna is switched.
For example, when the voltage value VT sent from the tuner to the satellite antenna is in the first state (9.5 V <VT <12.0 V), the vertically polarized signal received by the satellite antenna is output, and the tuner receives the satellite antenna. When the voltage value VT sent to is in the second state (13.5 V <VT <16.5 V), a horizontally polarized signal received by the satellite antenna is output. The display example of FIG. 2 indicates that the voltage value VT sent from the tuner to the satellite antenna is in the second state (13.5 V <VT <16.5 V).
As described above, in the broadcast signal measuring apparatus 1 of the present embodiment, the voltage value sent from the tuner to the satellite antenna is determined, and the polarization of the polarization designated by the tuner to the satellite antenna is determined. The type can also be read directly.
Also, it is possible to confirm at a glance when the voltage value sent from the tuner to the satellite antenna is not appropriate, or when the voltage drop in the transmission line on the way is large and the voltage specified by the tuner is not achieved.

尚,本発明は上記実施の形態に限定されるものではなく,本発明の趣旨を逸脱しない範囲で各部の回路構成を適宜に変更して実施することも可能である。
例えば,電圧値の状態の条件及び基準電圧は上記実施例と異なっても良い。また,分配4器の代わりに分岐器や方向性結合器を用いても良い。
It should be noted that the present invention is not limited to the above embodiment, and can be implemented by appropriately changing the circuit configuration of each part without departing from the spirit of the present invention.
For example, the condition of the voltage value state and the reference voltage may be different from those in the above embodiment. Further, a branching unit or a directional coupler may be used instead of the distribution unit 4.

本発明に係る放送信号の測定装置のブロックダイヤの1例を示す。1 shows an example of a block diagram of a broadcast signal measuring apparatus according to the present invention. 本発明に係る放送信号の測定装置の表示の1例を示す。An example of the display of the measuring apparatus of the broadcast signal which concerns on this invention is shown.

符号の説明Explanation of symbols

1…放送信号の測定装置,2…入力端子,3…入力側電源分離フィルター,4…分配器,5…出力側電源分離フィルター,6…出力端子,7…高周波測定回路,10…表示部,11…電圧判別回路,12…基準電圧発生回路,13…電源回路。
DESCRIPTION OF SYMBOLS 1 ... Broadcast signal measuring device, 2 ... Input terminal, 3 ... Input side power supply separation filter, 4 ... Distributor, 5 ... Output side power supply separation filter, 6 ... Output terminal, 7 ... High frequency measurement circuit, 10 ... Display part, DESCRIPTION OF SYMBOLS 11 ... Voltage discrimination circuit, 12 ... Reference voltage generation circuit, 13 ... Power supply circuit

Claims (1)

衛星放送受信用のチューナーから供給される直流電圧の値に応じて受信電波の偏波を切り換える衛星アンテナと,前記衛星放送受信用のチューナーとの間の伝送線路に設けられ,前記衛星アンテナから出力された受信信号の大きさを測定して表示部に表示する放送信号測定装置において,
前記衛星放送受信用のチューナーから前記衛星アンテナへ送電された前記直流電圧の電圧値を測定して,その測定した電圧値が,前記衛星アンテナにて受信電波の偏波を第1偏波に設定可能な第1電圧範囲内若しくは第2偏波に設定可能な第2電圧範囲内にあるか,各電圧範囲から外れているかを判定し,その判定結果に基づき,前記測定した電圧値を,前記第1電圧範囲及び前記第2電圧範囲と共に前記表示部の電圧表示領域に模式的に表示する電圧判別回路を備えたことを特徴とする放送信号測定装置。
Provided on a transmission line between a satellite antenna for switching the polarization of a received radio wave according to the value of a DC voltage supplied from a tuner for satellite broadcast reception and the tuner for satellite broadcast reception, and output from the satellite antenna In a broadcast signal measuring device that measures the size of a received signal and displays it on a display unit ,
The voltage value of the DC voltage transmitted from the tuner for satellite broadcast reception to the satellite antenna is measured, and the measured voltage value sets the polarization of the received radio wave to the first polarization at the satellite antenna. It is determined whether it is within the first voltage range that can be set or within the second voltage range that can be set to the second polarization, or out of each voltage range, and based on the determination result, the measured voltage value is A broadcast signal measuring apparatus, comprising: a voltage discriminating circuit that schematically displays in the voltage display area of the display unit together with the first voltage range and the second voltage range .
JP2004108243A 2004-03-31 2004-03-31 Broadcast signal measuring device Expired - Fee Related JP4430446B2 (en)

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