JPH0230286A - Catv protector - Google Patents

Catv protector

Info

Publication number
JPH0230286A
JPH0230286A JP18104688A JP18104688A JPH0230286A JP H0230286 A JPH0230286 A JP H0230286A JP 18104688 A JP18104688 A JP 18104688A JP 18104688 A JP18104688 A JP 18104688A JP H0230286 A JPH0230286 A JP H0230286A
Authority
JP
Japan
Prior art keywords
terminal
changeover
changeover device
switching
terminals
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
Application number
JP18104688A
Other languages
Japanese (ja)
Inventor
Yasushi Hamada
靖司 濱田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP18104688A priority Critical patent/JPH0230286A/en
Publication of JPH0230286A publication Critical patent/JPH0230286A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent noise invading to an incoming line without changing over a protector and to prevent deterioration in the communication at an incoming frequency band desired to be in use by allowing a changeover device to select the frequency band of the incoming signal. CONSTITUTION:A 1st input terminal 1 is connected to a CATV transmission line and a common terminal 2c of a 1st changeover device 2 is connected to the 1st input terminal. Moreover, a 1st changeover terminal 2a of the 1st changeover device 2 and a 1st changeover terminal 3a of a 2nd changeover device 3 are connected and a band limit filter 4 is inserted between a 2nd changeover terminal 2b of the 1st changeover device 2 and a 2nd changeover terminal 3b of the 2nd changeover device 3. Through the connection above, an outgoing signal is made equivalently coupled directly even if the signal passes through both paths and the frequency band of the incoming signal is selected by the changeover device.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はＣＡＴＶ保安器に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a CATV protector.

〔従来の技術〕[Conventional technology]

従来、この種のＣＡＴＶ保安器は、接続される宅内機器
側から侵入し流台する上り流台雑音を阻止する目的で特
定の周波数以下を阻止する広域ろ波器を内蔵させた構成
となっていた。Conventionally, this type of CATV protector has a built-in wide-area filter that blocks frequencies below a specific frequency in order to block upstream noise that enters and flows from connected home equipment. Ta.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のＣＡＴＶ保安器は、上り流台雑音除去の
ため、広域ろ波器を内蔵しているので、その広域が波器
の阻止域に使用したい映像信号周波数帯やデータ信号周
波数帯があった場合には、保安器そのものを取替えなけ
ればならないという欠点がある。The conventional CATV protector mentioned above has a built-in wide-area filter to remove upstream noise, so the wide area filter can be used for the video signal frequency band or data signal frequency band that you want to use as the filter's stopband. In this case, the disadvantage is that the protector itself must be replaced.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のＣＡＴＶ保安器は、第１または第２の切替端子
に接続する第１と第２の共通端子と前記第１の切替端子
同士を接続した第１と第２の切替器と、この第１と第２
の切替器の第２の切替端子間に挿入された帯域制限ろ波
器と、前記第１と第２の共通端子にそれぞれ接続する伝
送路側と宅内機器側の第１と第２の入出力端子とを有し
ている。The CATV protector of the present invention includes first and second common terminals connected to the first or second switching terminals, first and second switching devices connecting the first switching terminals, and the first and second switching terminals connected to each other. 1 and 2
a band-limiting filter inserted between the second switching terminals of the switch, and first and second input/output terminals on the transmission line side and the home equipment side connected to the first and second common terminals, respectively. It has

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.

本実施例は、ＣＡ、　Ｔ　Ｖ伝送路側に第１の入出力端
子１を接続し、第１の入出力端子と第１の切替器２の第
１の共通端子２ｃを接続し、第１の切替器２の第１の切
替端子２ａと第２の切替器３の第１の切替端子３ａを接
続し、第１の切替器２の第２の切替端子２ｂと第２の切
替器３の第２の切替端子３ｂ間に帯域制限７戸波器４を
挿入し、第２の切替器３の第２の共通端子３ｃに第２の
入出力端子５を接続し、第２の入出力端子５を宅内機器
側に接続して構成する。In this embodiment, the first input/output terminal 1 is connected to the CA and TV transmission line side, the first input/output terminal and the first common terminal 2c of the first switch 2 are connected, and the first The first switching terminal 2a of the switching device 2 and the first switching terminal 3a of the second switching device 3 are connected, and the second switching terminal 2b of the first switching device 2 and the first switching terminal 3a of the second switching device 3 are connected. A band limiter 7 waver 4 is inserted between the switching terminals 3b of the second switching device 3, and the second input/output terminal 5 is connected to the second common terminal 3c of the second switching device 3. Connect and configure on the home equipment side.

ここにおいて、下り信号については双方径路を通過して
も等測的に直結であり、上り信号周波数帯を切替器によ
って選択させる。Here, the downlink signal is isometrically directly connected even if it passes through both paths, and the uplink signal frequency band is selected by the switch.

上り周波数帯による通信の劣化を避けられるという効果
がある。This has the effect of avoiding deterioration in communication due to the uplink frequency band.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明のＣＡＴＶ保安器のブロック図である。 １．５・・・第１と第２の入出力端子、２．３・・・第
１と第２の切替器、２ａ、３ａ・・・第１の切替端子、
２ｂ、３ｂ・・・第２の切替端子、２ｃ、３ｃ・・・第
１と第２の共通端子、４・・・帯域制限が波器。FIG. 1 is a block diagram of a CATV protector according to the present invention. 1.5... First and second input/output terminals, 2.3... First and second switching devices, 2a, 3a... First switching terminals,
2b, 3b...second switching terminal, 2c, 3c...first and second common terminal, 4...bandwidth limiter.

Claims (1)

【特許請求の範囲】[Claims] 第１または第２の切替端子に接続する第１と第２の共通
端子と前記第１の切替端子同士を接続した第１と第２の
切替器と、この第１と第２の切替器の第２の切替端子間
に挿入された帯域制限ろ波器と、前記第１と第２の共通
端子にそれぞれ接続する伝送路側と宅内機器側の第１と
第２の入出力端子とを有することを特徴とするＣＡＴＶ
保安器。first and second common terminals connected to the first or second switching terminals; first and second switching devices connecting the first switching terminals; It has a band-limiting filter inserted between the second switching terminals, and first and second input/output terminals on the transmission line side and on the home equipment side, respectively connected to the first and second common terminals. CATV featuring
Safety device.
JP18104688A 1988-07-19 1988-07-19 Catv protector Pending JPH0230286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18104688A JPH0230286A (en) 1988-07-19 1988-07-19 Catv protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18104688A JPH0230286A (en) 1988-07-19 1988-07-19 Catv protector

Publications (1)

Publication Number Publication Date
JPH0230286A true JPH0230286A (en) 1990-01-31

Family

ID=16093824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18104688A Pending JPH0230286A (en) 1988-07-19 1988-07-19 Catv protector

Country Status (1)

Country Link
JP (1) JPH0230286A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07308021A (en) * 1994-05-10 1995-11-21 Meguro Denki Seizo Kk Protector for catv subscriber
JP2001346185A (en) * 2000-06-05 2001-12-14 Maspro Denkoh Corp Two-way catv system
WO2012168652A1 (en) 2011-06-08 2012-12-13 Peugeot Citroën Automobiles SA Device for protecting a vehicle user
WO2012168653A1 (en) 2011-06-08 2012-12-13 Peugeot Citroën Automobiles SA Compartment partition
WO2012168654A1 (en) 2011-06-10 2012-12-13 Peugeot Citroen Automobiles Sa Vehicle allowing safe carriage of loads

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07308021A (en) * 1994-05-10 1995-11-21 Meguro Denki Seizo Kk Protector for catv subscriber
JP2001346185A (en) * 2000-06-05 2001-12-14 Maspro Denkoh Corp Two-way catv system
JP4582873B2 (en) * 2000-06-05 2010-11-17 マスプロ電工株式会社 Bidirectional amplifier
WO2012168652A1 (en) 2011-06-08 2012-12-13 Peugeot Citroën Automobiles SA Device for protecting a vehicle user
WO2012168653A1 (en) 2011-06-08 2012-12-13 Peugeot Citroën Automobiles SA Compartment partition
WO2012168654A1 (en) 2011-06-10 2012-12-13 Peugeot Citroen Automobiles Sa Vehicle allowing safe carriage of loads

Similar Documents

Publication Publication Date Title
US5255267A (en) Apparatus for combining broadband and baseband signal transmissions
CA2279076A1 (en) Signal distribution network
WO1998054901A8 (en) Twisted pair communication system
US2516211A (en) Filter connecting telephone transmitter to power line during calls
JPH0230286A (en) Catv protector
US5045823A (en) Terminating scheme for transmitting multiple signals on a coaxial cable to multiple tap outlets
KR0154793B1 (en) Radio telephone
US3932712A (en) Telephone transmission system
CA2049005C (en) Key telephone apparatus
JPH01143517A (en) Filter circuit
US5581386A (en) Method of terminal control signal transmission and photonic switching system incorporating said method
JP4536888B2 (en) Bidirectional amplifier
JP2000041230A (en) Two-way catv filter
JPH02303225A (en) Tr box
JPH02127824A (en) Two-way catv relay amplifier
JPS59215185A (en) Converter input and output device
JPS63309084A (en) Noise reducing circuit
RU45217U1 (en) AUTOMATIC WIRELESS BROADCASTING SYSTEM
US2883464A (en) Device for signal receivers
JPH07298246A (en) Signal transmission method for two-way catv system and two-way amplifier used for the method
JPH0478855U (en)
JPH0287759A (en) Information transmission system
JPH07288794A (en) Bidirectional catv transmission system
JPS6139774B2 (en)
JPH02260967A (en) Facsimile equipment