JPS6333384Y2 - - Google Patents
Info
- Publication number
- JPS6333384Y2 JPS6333384Y2 JP1981091782U JP9178281U JPS6333384Y2 JP S6333384 Y2 JPS6333384 Y2 JP S6333384Y2 JP 1981091782 U JP1981091782 U JP 1981091782U JP 9178281 U JP9178281 U JP 9178281U JP S6333384 Y2 JPS6333384 Y2 JP S6333384Y2
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- signal
- light
- output level
- television
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000007689 inspection Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
Landscapes
- Details Of Television Systems (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Description
【考案の詳細な説明】
本考案は、柱上に張られたメツセンジヤワイヤ
等に吊り下げられたテレビ共聴用増幅器の出力レ
ベルを遠隔的に測定できるようにしたテレビ共聴
用増幅器のレベルモニタ装置に関する。[Detailed description of the invention] The present invention is a TV common listening amplifier that allows the output level of a TV common listening amplifier suspended from a messenger wire stretched on a pole to be measured remotely. The present invention relates to a level monitor device.
従来、テレビ共聴システムにおいて電柱上に張
り渡されたメツンジヤワイヤ等に吊り下げられて
いるテレビ共聴用増幅器（線路増幅器）を現場で
点検する場合には、増幅器を設けている電柱には
しご等をかけて登り、増幅器のモニタ端子を使つ
て増幅器の出力レベルを測定することで点検する
ようにしている。また、システムに故障が起きた
ような場合には、増幅器の１台１台について上記
の点検作業を行なうこととなり、このため、定期
点検及びシステム故障時の点検に時間がかかり、
特にシステムの故障時には故障した増幅器の発見
に手間取るという問題がある。 Conventionally, when inspecting on-site the TV common listening amplifier (line amplifier), which is suspended from a mesh wire stretched over a telephone pole in a TV common listening system, it is necessary to place a ladder etc. on the telephone pole where the amplifier is installed. I try to inspect it by climbing up and measuring the output level of the amplifier using the amplifier's monitor terminal. In addition, in the event of a system failure, the above inspection work must be performed on each amplifier, which means that periodic inspections and inspections in the event of a system failure take time.
In particular, there is a problem in that when a system failure occurs, it takes time to discover the failed amplifier.
本考案は、このような従来の問題点に着目して
なされたもので、取付け状態にあるテレビ共聴用
増幅器の筐体底面に、増幅器の出力レベルに応じ
た変調光を発する発光素子を設け、この発光素子
からの光を携帯用の測定器で受光して復調するこ
とにより増幅器の出力レベルの測定を遠隔的に行
なえるようにし、点検を簡単かつ容易に行なえる
ようにして上記の問題点を解決することを目的と
する。 The present invention was developed by focusing on these conventional problems, and includes a light emitting element that emits modulated light according to the output level of the amplifier on the bottom of the casing of the installed TV common listening amplifier. By receiving and demodulating the light from this light emitting element with a portable measuring device, the output level of the amplifier can be measured remotely, making inspection simple and easy, and solving the above problem. The purpose is to resolve the points.
以下、本考案を図面に基づいて説明する。 Hereinafter, the present invention will be explained based on the drawings.
第１図は本考案に用いるテレビ共聴用増幅器の
一実施例を示したブロツク図である。 FIG. 1 is a block diagram showing an embodiment of a television common listening amplifier used in the present invention.
まず構成を説明すると、増幅器筐体１の内部に
は、幹線ケーブル２を介して入力するテレビ信号
（90〜222MHz）を所定の出力レベルに増幅して出
力する線路増幅器３が設けられ、この線路増幅器
３は前置増幅器４、利得制御回路５主軸増幅器６
で構成され、テレビ信号に含まれるAGC制御用
のパイロツト信号を分岐器７、フイルタ８で取り
出し、検波器９で直流電圧に変換した後にDCア
ンプ１０で増幅し、利得制御回路５はAGC制御
電圧ea（−１〜−5V）を印加するようにしてい
る。このAGC制御電圧eaは線路増幅器３の出力
レベルに応じた信号電圧となるので、この実施例
ではAGC制御電圧eaに応じてモニタ用の変調光
を作り出すようにしている。 First, to explain the configuration, a line amplifier 3 is provided inside the amplifier housing 1 to amplify a TV signal (90 to 222MHz) input via a main cable 2 to a predetermined output level and output it. The amplifier 3 includes a preamplifier 4, a gain control circuit 5, and a main shaft amplifier 6.
The pilot signal for AGC control included in the TV signal is taken out by a brancher 7 and a filter 8, converted to a DC voltage by a detector 9, and then amplified by a DC amplifier 10, and the gain control circuit 5 outputs the AGC control voltage. I try to apply e a (-1 to -5V). Since this AGC control voltage e a becomes a signal voltage according to the output level of the line amplifier 3, in this embodiment, modulated light for monitoring is produced according to the AGC control voltage e a .
すなわち、AGC制御電圧eaをＶ／Ｆ変換器１
１に入力して制御電圧eaに応じて変化する数ＫHz
オーダの周波数信号に変換し、次いで、発振器１
２で発振した数十ＫHz程度の一定周波数信号によ
り変調器１３で振幅変調した後に、増幅器筐体の
取付け状態における底面に露出して取付けている
発光ダイオード１４に変調器１３の出力を印加
し、線路増幅器３の出力レベルに応じた変調光
Lnを発するようにしている。 In other words, the AGC control voltage e a is
A number of KHz that is input to 1 and changes depending on the control voltage e a
Convert to a frequency signal of the order of magnitude, and then use the oscillator 1
2, the output of the modulator 13 is applied to the light emitting diode 14 which is exposed and attached to the bottom surface of the amplifier housing when the amplifier housing is installed. Modulated light according to the output level of line amplifier 3
I am trying to emit L n .
第２図は第１図のテレビ共聴用増幅器に組合せ
て用いられる携帯用測定器の一実施例を示したブ
ロツク図であり、測定器１５の外部に露出して受
光素子としてのフオトダイオード１６を設け、光
の受光によるフオトダイオード１６のインピーダ
ンスが変調光Lnに対してのみ共振的に応動し、
太陽光、街燈等からの光による外乱光に対しては
感応しないようにフオトダイオード１６と直列に
ハイパスフイルタ１７を接続している。変調光
Lnの受光信号はハイパスフイルタ１７とフオト
ダイオード１６との接続点から取り出され、AC
アンプ１８で増幅した後に復調器１９で出力レベ
ルに応じた数ＫHzオーダの信号成分が取り出さ
れ、Ｆ／Ｖ変換器２０で直流電圧に変換された後
に表示器としてのレベルメータ２１に加えられ
て、増幅器の出力レベルを表示するようにしてい
る。 FIG. 2 is a block diagram showing an embodiment of a portable measuring device used in combination with the television public listening amplifier shown in FIG. is provided, and the impedance of the photodiode 16 due to light reception responds resonantly only to the modulated light L n ,
A high-pass filter 17 is connected in series with the photodiode 16 so as not to be sensitive to disturbance light from sunlight, streetlights, etc. modulated light
The light reception signal of L n is taken out from the connection point between the high-pass filter 17 and the photodiode 16, and then
After being amplified by an amplifier 18, a signal component on the order of several KHz corresponding to the output level is extracted by a demodulator 19, converted to a DC voltage by an F/V converter 20, and then added to a level meter 21 as an indicator. , the output level of the amplifier is displayed.
第３図は第１，２図に示した本考案の実施例に
よるテレビ共聴用増幅器の出力レベルの測定状態
を示したもので、電柱２２に張られたメツセンジ
ヤワイヤ２３に吊り下げられている増幅器筐体１
の底面には、増幅器の出力レベルに応じた変調光
Lnを常時発している発光ダイオード１４が設け
られているので、保守点検の際には作業者が増幅
器筐体１の近く（発光ダイオードの指向角の範囲
内）に行つて測定器１５の電源を入れると、変調
光Lnが測定器１５のフオトダイオード１６で受
光され、レベルメータ２１に出力レベルが表示さ
れ、簡単に出力レベルを測定することができる。 FIG. 3 shows the measurement state of the output level of the television common listening amplifier according to the embodiment of the present invention shown in FIGS. Amplifier housing 1
On the bottom of the
Since a light emitting diode 14 that constantly emits L n is provided, when performing maintenance and inspection, an operator must go near the amplifier housing 1 (within the directional angle of the light emitting diode) and turn on the power source of the measuring instrument 15. When the modulated light L n is received by the photodiode 16 of the measuring device 15, the output level is displayed on the level meter 21, and the output level can be easily measured.
第４図は本考案の他の実施例としてのテレビ共
聴用増幅器を示したブロツク図であり、この実施
例では、テレビ信号の各チヤンネル毎の出力レベ
ルをモニタできるようにしたことを特徴とする。 FIG. 4 is a block diagram showing a television common listening amplifier as another embodiment of the present invention, and this embodiment is characterized by being able to monitor the output level of each channel of the television signal. do.
すなわち、線路増幅器３の出力を分岐器２４で
取り出してチヤンネルフイルタ２５に入力して１
〜12chの各チヤンネル信号に分け、検波器２６
ａ〜２６ｌのそれぞれで直流信号に変換してDC
アンプ２７ａ〜２７ｌで増幅し、DCアンプ２７
ａ ２７ｌの出力にはタイミングジエネレータ３
１からのクロツクで作動するマルチプレクサ２９
の出力で順次オンするアナログスイツチ２８ａ〜
２８ｌが設けられ、各アナログスイツチ２８ａ〜
２８ｌからの信号はチヤンネル情報と共にＡ／Ｄ
変換器３０でデジタル信号に変換され、アンドゲ
ート３２を介して変調器３４に加えられる。変調
器３４はデジタル信号を発振器３３の出力する数
十ＫHzの一定周波数信号にてパルスコード変調
し、この変調器３４の出力で発光ダイオード３５
を駆動して各チヤンネル信号の出力レベルを表わ
す変調パルス光LPを順次発する。 That is, the output of the line amplifier 3 is taken out by the brancher 24, inputted to the channel filter 25, and then
~ Divide into each channel signal of 12ch, detector 26
Each of a to 26l is converted to a DC signal and DC
Amplified by amplifiers 27a to 27l, and DC amplifier 27
a Timing generator 3 is used for the output of 27l.
Multiplexer 29 operated by a clock from 1
The analog switches 28a to 28a are turned on sequentially with the output of
28l are provided, each analog switch 28a~
The signal from 28l is sent to A/D along with channel information.
It is converted into a digital signal by a converter 30 and applied to a modulator 34 via an AND gate 32. The modulator 34 performs pulse code modulation on the digital signal using a constant frequency signal of several tens of KHz output from the oscillator 33, and the output of the modulator 34 is used to generate a light emitting diode 35.
is driven to sequentially emit modulated pulsed light L P representing the output level of each channel signal.
第５図は第４図の実施例に組合わされる測定器
のブロツク図であり、第２図の実施例と同様に、
変調パルス光LPを受光するフオトダイオード３
６、外乱光による受光信号をカツトするハイパス
フイルタ３７を有し、受光パルス信号をACアン
プ３８で増幅した後に、復調器４０で数十ＫHzの
変調成分を取り除いて出力レベルに応じたデジタ
ル信号を取り出すようにしている。この復調器４
０の復調は、チヤンネルセレクタ３９からの選択
信号に応じた特定のチヤンネルについてのみ行な
われ、具体的には変調パルス光に含まれるチヤン
ネル情報とチヤンネルセレクタ３９の設定チヤン
ネルとが一致したときに、復調出力を生ずるよう
にしている。復調器４０で取り出された所定チヤ
ンネルの出力レベルを表わすデジタル信号は、
Ｄ／Ａ変換器４１でアナログ信号に変換されてレ
ベルメータ４２に表示される。また、レベルメー
タ４２の表示レベルが何チヤンネルであるかを示
すため、チヤンネルセレクタ３９の選択チヤンネ
ルを表示するチヤンネル表示器４３を設けるよう
にしている。 FIG. 5 is a block diagram of a measuring instrument that is combined with the embodiment shown in FIG. 4, and similarly to the embodiment shown in FIG.
Photodiode 3 that receives modulated pulsed light L P
6. It has a high-pass filter 37 that cuts out the received light signal due to disturbance light, and after amplifying the received light pulse signal with an AC amplifier 38, a demodulator 40 removes the modulation component of several tens of KHz and generates a digital signal according to the output level. I'm trying to take it out. This demodulator 4
0 demodulation is performed only on a specific channel according to the selection signal from the channel selector 39. Specifically, when the channel information included in the modulated pulsed light matches the channel set by the channel selector 39, the demodulation is performed only on a specific channel according to the selection signal from the channel selector 39. It is designed to produce an output. The digital signal representing the output level of a predetermined channel extracted by the demodulator 40 is
The signal is converted into an analog signal by the D/A converter 41 and displayed on the level meter 42. Further, in order to indicate which channel the level meter 42 is displaying, a channel display 43 is provided to display the channel selected by the channel selector 39.
この第４，５図に示す実施例についても、第３
図に示すように、測定器１５をメツセンジヤワイ
ヤ２３に吊り下げられている増幅器筐体１の下に
持つていくことにより、増幅器の出力レベルを簡
単に測定することができ、特に、テレビ信号の各
チヤンネル毎の出力レベルを測定できるので、保
守点検の精度を更に高めることができる。以上説
明してきたように、本考案によれば、取付け状態
にあるテレビ共聴用増幅器の筐体定面に、増幅器
の出力レベルに応じた変調光を発する発光素子を
設け、この発光素子からの光を携帯用ので受光し
て復調することにより増幅器の出力レベルを表示
するようにしたため、定期点検の際にはしご等を
かけて登らなくとも、地上に立つたままで増幅器
の出力レベルを知ることができ、特にシステムの
故障時における故障した増幅器の発見が極めて容
易に且つ短時間で行なうことができ、保守点検に
要する作業労力の大幅な低減を図ると共に作業の
安全性を高めることもできるという効果が得られ
る。 Regarding the embodiment shown in FIGS. 4 and 5, the third
As shown in the figure, by holding the measuring device 15 under the amplifier housing 1 suspended from the messenger wire 23, the output level of the amplifier can be easily measured. Since the output level of each signal channel can be measured, the precision of maintenance and inspection can be further improved. As explained above, according to the present invention, a light emitting element that emits modulated light according to the output level of the amplifier is provided on the front surface of the housing of the installed television common listening amplifier, and the light emitting element emits modulated light according to the output level of the amplifier. Since the amplifier's output level is displayed by receiving and demodulating light with a portable device, it is possible to know the amplifier's output level while standing on the ground without having to climb a ladder or the like during periodic inspections. In particular, in the event of a system failure, the failure of the amplifier can be found extremely easily and in a short time.The work effort required for maintenance and inspection can be significantly reduced, and work safety can also be improved. is obtained.
第１図は本考案で用いるテレビ共聴用増幅器の
一実施例を示したブロツク図、第２図は第１図の
実施例に組合わされる携帯用測定器の一実施例を
示したブロツク図、第３図は第１，２図の実施例
による測定状態を示した説明図、第４，５図はテ
レビ信号の各チヤンネル毎の出力レベルをモニタ
するテレビ共聴用増幅器及び携帯用測定器の他の
実施例を示したブロツク図である。
１……増幅器筐体、２……幹線ケーブル、３…
…線路増幅器、１１……Ｖ／Ｆ変換器、１２，３
３……発振器、１３，３４……変調器、１４，３
５……発光ダイオード、１５……測定器、１６，
３６……フオトダイオード、１７，３７……ハイ
パスフイルタ、１８，３８……ACアンプ、１９，
４０……復調器、２０……Ｆ／Ｖ変換器、２１，
４２……レベルメータ、２４……分岐器、２５…
…チヤンネルフイルタ、２６ａ，２６ｌ……検波
器、２７ａ，２７ｌ……DCアンプ、２８ａ，２
８ｌ……アナログスイツチ、２９……マルチプレ
クサ、３０……Ａ／Ｄ変換器、３１……タイミン
グジユネレータ、３２……アンドゲート、３９…
…チヤンネルセレクタ、４１……Ｄ／Ａ変換器、
４３……チヤンネル表示器。
Fig. 1 is a block diagram showing an embodiment of a television common listening amplifier used in the present invention, and Fig. 2 is a block diagram showing an embodiment of a portable measuring device that is combined with the embodiment of Fig. 1. , Fig. 3 is an explanatory diagram showing the measurement state according to the embodiment shown in Figs. 1 and 2, and Figs. 4 and 5 show an amplifier for common TV listening and a portable measuring device for monitoring the output level of each channel of a TV signal. FIG. 2 is a block diagram showing another embodiment of the invention. 1...Amplifier housing, 2...Main cable, 3...
...Line amplifier, 11...V/F converter, 12,3
3...Oscillator, 13,34...Modulator, 14,3
5... Light emitting diode, 15... Measuring device, 16,
36...Photodiode, 17,37...High pass filter, 18,38...AC amplifier, 19,
40... Demodulator, 20... F/V converter, 21,
42... Level meter, 24... Turnout, 25...
...Channel filter, 26a, 26l...Detector, 27a, 27l...DC amplifier, 28a, 2
8l...analog switch, 29...multiplexer, 30...A/D converter, 31...timing generator, 32...and gate, 39...
...Channel selector, 41...D/A converter,
43...Channel display.
Claims (1)
られるテレビ共聴用増幅器と携帯用測定器との組
合わせによるテレビ共聴用増幅器のレベルモニタ
装置において、 前記テレビ共聴用増幅器はテレビ信号を分岐す
る分岐器と、該分岐器からのテレビ信号を検波す
る検波器と、該検波器からの直流電圧を増幅する
DCアンプと、該DCアンプからの出力レベルを変
調する変調器と、前記テレビ共聴用増幅器の筐体
底面に設けられ且つ前記変調器からの出力に基づ
いて変調光を発光する発光素子とから構成し、 前記携帯用測定器は、前記発光素子からの変調
光を受光する受光素子と、該受光素子の受光信号
を復調する復調器と、該復調器の出力レベルに基
づいてレベル表示する表示器とから構成したこと
を特徴とするテレビ共聴用増幅器のレベルモニタ
装置。[Scope of Claim for Utility Model Registration] A level monitoring device for a television communal listening amplifier that is a combination of a television communal listening amplifier and a portable measuring device, which are hung and attached to a messenger wire or the like, The amplifier includes a splitter that branches the TV signal, a detector that detects the TV signal from the splitter, and amplifies the DC voltage from the detector.
A DC amplifier, a modulator that modulates the output level from the DC amplifier, and a light emitting element that is provided on the bottom surface of the casing of the television common listening amplifier and that emits modulated light based on the output from the modulator. The portable measuring device includes a light receiving element that receives modulated light from the light emitting element, a demodulator that demodulates the light reception signal of the light receiving element, and a display that displays a level based on the output level of the demodulator. 1. A level monitor device for a television common listening amplifier, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981091782U JPS6333384Y2 (en) | 1981-06-22 | 1981-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981091782U JPS6333384Y2 (en) | 1981-06-22 | 1981-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57204756U JPS57204756U (en) | 1982-12-27 |
| JPS6333384Y2 true JPS6333384Y2 (en) | 1988-09-06 |
Family
ID=29886854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981091782U Expired JPS6333384Y2 (en) | 1981-06-22 | 1981-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333384Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417612A (en) * | 1977-07-08 | 1979-02-09 | Maspro Denko Kk | Community receiving system amplifier |
-
1981
- 1981-06-22 JP JP1981091782U patent/JPS6333384Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417612A (en) * | 1977-07-08 | 1979-02-09 | Maspro Denko Kk | Community receiving system amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57204756U (en) | 1982-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866301A (en) | Grounding resistance analyzing device and grounding resistance analyzing method | |
| AR011017A1 (en) | SYSTEM AND METHOD FOR THE ELECTRONIC PRESENTATION OF GEOGRAPHICAL MAPS | |
| JPS6333384Y2 (en) | ||
| CN105403373A (en) | Diffusion type natural gas station gas leakage laser online monitoring early warning apparatus | |
| CN212514245U (en) | Laser dangerous gas remote measuring and collecting system | |
| CN205384128U (en) | Laser on -line monitoring early warning device is revealed to a diffusion formula natural gas station gas | |
| CN202815094U (en) | Grounding resistance analysis device | |
| RU2537804C2 (en) | Method for early detection of fire and device for its implementation | |
| CN211877112U (en) | Quick industrial data acquisition device | |
| EP0458429A2 (en) | Optical measurement device | |
| JP2000009527A (en) | Noise-monitoring system and cable transmission system | |
| US7022963B2 (en) | Laser receiver | |
| KR0145135B1 (en) | Method and apparatus for remote sensing of faults of the distribution line | |
| US5353260A (en) | Noise signal processor | |
| KR101218153B1 (en) | Apparatus for insulation deterioration diagnosis of power utilities | |
| JP2020064035A (en) | Disaster prevention-capable satellite broadcast television device having rainfall intensity measurement and display function | |
| CN107765132A (en) | A kind of monitoring indicator lamp for gathered data | |
| RU2586856C1 (en) | Method for early fire detection and device therefor | |
| CN212433401U (en) | Meter box key tracking and positioning circuit hardware system | |
| JPS5527756A (en) | Fault position measuring system for communication balanced cable line | |
| SE8205399D0 (en) | PROCEDURE AND DEVICE FOR SEATING OF FREQUENCY | |
| CN207280928U (en) | A kind of anti-interference of stray light photodetector system based on digital servo-control | |
| JP2009047620A (en) | Optical power meter | |
| RU55989U1 (en) | DEVICE FOR CONTACTLESS IDENTIFICATION OF THE PRESENCE AND LOCATION OF DEFECTS OF METAL PIPELINE | |
| SU1441336A1 (en) | Apparatus for monitoring the quality of contacts of electronic units |