JPH04284789A - Trunk line amplifier - Google Patents
Trunk line amplifierInfo
- Publication number
- JPH04284789A JPH04284789A JP3072151A JP7215191A JPH04284789A JP H04284789 A JPH04284789 A JP H04284789A JP 3072151 A JP3072151 A JP 3072151A JP 7215191 A JP7215191 A JP 7215191A JP H04284789 A JPH04284789 A JP H04284789A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- fault
- transmitter
- radio waves
- line amplifier
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、ＣＡＴＶの幹線ケーブ
ルに挿入して用いられる幹線増幅器に関するものである
。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trunk amplifier used by being inserted into a CATV trunk cable.
【０００２】0002
【従来の技術】かかる幹線増幅器は、一般に監視回路を
備えており、電源電圧の異常、信号断等の障害が生ずる
と、これを監視回路が検出し、ＣＡＴＶの幹線ケーブル
を介して警報信号の送出を行い、これにより中央装置へ
障害の発生を報知するものとなっている。2. Description of the Related Art Such main line amplifiers are generally equipped with a monitoring circuit, and when a failure such as an abnormality in the power supply voltage or a signal cut-off occurs, the monitoring circuit detects this and issues an alarm signal via the CATV main cable. This is used to notify the central device of the occurrence of a failure.
【０００３】0003
【発明が解決しようとする課題】しかし、障害の報知に
応じて係員が出動し、当該増幅器の修理を行う場合、幹
線増幅器の設置部位が電柱間の架線中等、高所の空間で
あるため、夜間では目視による当該増幅器の発見が困難
となり、修理が遅延する欠点を生じている。[Problem to be Solved by the Invention] However, when a staff member is dispatched to repair the amplifier in response to notification of a fault, since the main amplifier is installed in a high space such as an overhead wire between utility poles, At night, it is difficult to visually detect the amplifier, resulting in a delay in repair.
【０００４】したがって、本発明の目的は、障害を生じ
た際の発見を容易とする幹線増幅器を提供するものであ
る。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a mains amplifier that facilitates detection of failures when they occur.
【０００５】[0005]
【課題を解決するための手段】本発明は、上述の幹線増
幅器において、監視回路の検出出力に応じ、障害の発生
を示す電波の送信を行う送信機を設けたものである。SUMMARY OF THE INVENTION According to the present invention, the above-mentioned trunk amplifier is provided with a transmitter that transmits radio waves indicating the occurrence of a fault in response to the detection output of the monitoring circuit.
【０００６】[0006]
【作用】したがって、ハンデイタイプ等の受信機を携行
することにより、電波の受信状況に応じて当該増幅器を
容易に発見することができる。[Operation] Therefore, by carrying a handy type receiver or the like, the amplifier can be easily found depending on the radio wave reception situation.
【０００７】[0007]
【実施例】以下、実施例を示す図１のブロック図により
本発明の詳細を説明する。同図において、入力端１から
のＣＡＴＶ信号は、混合器２を介して増幅器３により増
幅され、出力端４から送出されるものとなっており、入
力端１および出力端４がＣＡＴＶの幹線ケーブル中へ介
挿され、これにより幹線ケーブルの伝送損失補償が行わ
れる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to the block diagram of FIG. 1 showing an embodiment. In the same figure, a CATV signal from an input end 1 is amplified by an amplifier 3 via a mixer 2, and then sent out from an output end 4, and the input end 1 and output end 4 are connected to the CATV main cable. This compensates for the transmission loss of the trunk cable.
【０００８】一方、監視回路５が増幅器３の電源電圧、
信号レベル等を監視し、これらに異常を生ずれば障害の
発生を検出するものとなっており、障害の検出に応じて
警報信号を送出し、混合器２および入力端１を介して幹
線ケーブルへ警報信号の送信を行い、これにより中央装
置へ障害の発生を報知するものとなっている。On the other hand, the monitoring circuit 5 monitors the power supply voltage of the amplifier 3,
It monitors the signal level, etc., and detects the occurrence of a fault if an abnormality occurs in these. In response to the detection of a fault, an alarm signal is sent out, and the signal is sent to the main cable via the mixer 2 and the input terminal 1. This system notifies the central equipment of the occurrence of a failure.
【０００９】また、監視回路５の検出出力は送信機６へ
与えられており、この検出出力に応じて送信機６が障害
の発生を示す電波の送信を行うため、これがアンテナ端
子７およびアンテナ８を介して送信される。Furthermore, the detection output of the monitoring circuit 5 is given to a transmitter 6, and in response to this detection output, the transmitter 6 transmits radio waves indicating the occurrence of a fault. Sent via .
【００１０】したがって、中央装置側では、警報信号の
受信に応じて係員が出動する際、ハンデイタイプ等の小
型受信機９を携行するものとし、これにより送信機６の
送信電波を受信しながら探索を行えば、電波の受信状況
に応じて当該増幅器を容易に発見することができる。[0010] Therefore, on the central equipment side, when a staff member is dispatched in response to the reception of an alarm signal, he/she shall carry a small receiver 9 such as a handy type, so that he/she can search while receiving the radio waves transmitted by the transmitter 6. If this is done, the amplifier can be easily found depending on the radio wave reception status.
【００１１】なお、送信機６の出力は、電波法上許容さ
れる微弱電界のもので十分であり、識別を容易とするに
は特定の信号により変調するものとしておけばよい。Note that the output of the transmitter 6 is sufficient to have a weak electric field permitted under the Radio Law, and to facilitate identification, it may be modulated with a specific signal.
【００１２】0012
【発明の効果】本発明によれば、障害の検出に応じ、こ
れを示す電波の送信を行う送信機を設けたことにより、
障害を生じた幹線増幅器の発見が容易となり、特に夜間
において有効であり、障害の修理が速やかとなるため、
各種のＣＡＴＶシステムにおいて顕著な効果が得られる
。[Effects of the Invention] According to the present invention, by providing a transmitter that transmits radio waves indicating a failure in response to detection of the failure,
This makes it easier to find faulty mains amplifiers, which is especially effective at night, and allows for prompt repair of faults.
Remarkable effects can be obtained in various CATV systems.
【図１】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
１ 入力端 ２ 混合器 ３ 増幅器 ５ 監視回路 ６ 送信機 ７ アンテナ端子 ８ アンテナ 1 Input end 2 Mixer 3 Amplifier 5 Monitoring circuit 6 Transmitter 7 Antenna terminal 8 Antenna
Claims (1)
ＡＴＶ用の幹線増幅器において、前記監視回路の検出出
力に応じ障害の発生を示す電波の送信を行う送信機を設
けたことを特徴とする幹線増幅器。Claim 1: A C comprising a monitoring circuit for detecting a failure.
A main line amplifier for an ATV, characterized in that a transmitter is provided for transmitting radio waves indicating the occurrence of a fault in response to the detection output of the monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3072151A JPH04284789A (en) | 1991-03-13 | 1991-03-13 | Trunk line amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3072151A JPH04284789A (en) | 1991-03-13 | 1991-03-13 | Trunk line amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04284789A true JPH04284789A (en) | 1992-10-09 |
Family
ID=13480972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3072151A Pending JPH04284789A (en) | 1991-03-13 | 1991-03-13 | Trunk line amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04284789A (en) |
-
1991
- 1991-03-13 JP JP3072151A patent/JPH04284789A/en active Pending
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