JPH0969964A - Tap-off with transforming function for catv - Google Patents
Tap-off with transforming function for catvInfo
- Publication number
- JPH0969964A JPH0969964A JP7246712A JP24671295A JPH0969964A JP H0969964 A JPH0969964 A JP H0969964A JP 7246712 A JP7246712 A JP 7246712A JP 24671295 A JP24671295 A JP 24671295A JP H0969964 A JPH0969964 A JP H0969964A
- Authority
- JP
- Japan
- Prior art keywords
- tap
- catv
- power
- frequency signal
- subscriber
- 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.)
- Granted
Links
- 230000001131 transforming effect Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 abstract description 19
- 230000001012 protector Effects 0.000 abstract description 17
- 238000004804 winding Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Details Of Television Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＣＡＴＶシステムの
分配線と加入者宅の引込線とを接続するためのＣＡＴＶ
用タップオフに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CATV for connecting a distribution line of a CATV system and a service line of a subscriber's house.
For tap-off.
【０００２】[0002]
【従来の技術】双方向ＣＡＴＶシステムは近年は、単な
る映像信号やデータの伝送に利用されるだけではなく、
電話サービスにも利用されている。双方向ＣＡＴＶシス
テムを利用した電話サービスの一例として図４に示す様
なシステムがある。これは、加入者Ａ側に置かれた端末
機（ＶＩＵ：Voice Interface Unit）からのデジタル信
号をＣＡＴＶシステムの上り帯域を利用して、保安器
Ｋ、タップオフＤ、双方向増幅器Ｃを通してヘッドエン
ド装置Ｂに置かれた電話用センター装置まで伝送し、そ
のデジタル信号を電話用センター装置の交換器によりＣ
ＡＴＶシステムの下り帯域に乗せて双方向増幅器Ｃ、タ
ップオフＤ、保安器Ｋを通して他の加入者側の端末機に
伝達し、加入者間同士が通話出来るようにしたものであ
る。なお、図４のタップオフＤは図２に示す様に入力端
Ａと出力端Ｂの間に直列に設けられたコンデンサＣ1 、
Ｃ2 、両コンデンサＣ1 、Ｃ2 間に設けられた分岐器
Ｇ、分配器Ｈ、分配器Ｈと分岐出力端子Ｉ1 、Ｉ2 間に
設けられたコンデンサＣ3 、Ｃ4、入力端Ａと出力端Ｂ
間に並列に設けられたチョークコイルＪ1 、Ｊ2 、両チ
ョークコイルＪ1 、Ｊ2 間に設けられたコンデンサＣ5
とから構成されている。チョークコイルＪ1 、Ｊ2 はタ
ップオフの入力側又は出力側に接続される増幅器に電源
を送電するために設けられたものである。2. Description of the Related Art In recent years, an interactive CATV system has been used not only for transmitting video signals and data,
It is also used for telephone services. As an example of a telephone service using the bidirectional CATV system, there is a system as shown in FIG. This is a head-end device using a digital signal from a terminal (VIU: Voice Interface Unit) placed on the subscriber A side through a protector K, a tap-off D, and a bidirectional amplifier C using the upstream band of the CATV system. It is transmitted to the telephone center unit placed in B and the digital signal is transmitted by the exchange of the telephone center unit to C.
The signal is transmitted to the other subscriber's terminal through the bidirectional amplifier C, the tap-off D, and the protector K in the downlink band of the ATV system so that the subscribers can talk with each other. The tap-off D in FIG. 4 is a capacitor C 1 provided in series between the input end A and the output end B as shown in FIG.
C 2, both capacitors C 1, C turnout provided between 2 G, distributor H, distributor H and the branch output terminals I 1, a capacitor provided between the I 2 C 3, C 4, an input terminal A And output end B
Choke coils J 1 and J 2 provided in parallel between them, and a capacitor C 5 provided between both choke coils J 1 and J 2.
It is composed of The choke coils J 1 and J 2 are provided for transmitting power to an amplifier connected to the tap-off input side or output side.
【０００３】[0003]
【発明が解決しようとする課題】ＣＡＴＶシステムによ
り電話サービスを実現する場合、現状のＣＡＴＶシステ
ムでは、加入者側の電話用端末機（ＶＩＵ）を初めとす
る各種の端末側機器は全て加入者側の電源で駆動されて
いるため、雷障害等により加入者側が停電した場合、加
入者側の端末機が動作しなくなり、電話が通じなくなっ
てしまうという問題があった。When a telephone service is realized by a CATV system, in the current CATV system, all terminal equipments such as a telephone terminal (VIU) on the subscriber side are all on the subscriber side. Since there is a power failure on the subscriber side due to a lightning failure or the like, there is a problem that the terminal device on the subscriber side does not work and the telephone cannot be connected.
【０００４】[0004]
【課題を解決するための手段】本発明は前記課題を解決
するため、ＣＡＴＶシステムでは施設側から加入者側へ
送られる高周波信号に、ＣＡＴＶシステムの幹線、分岐
幹線等に接続されている幹線増幅器、幹線分岐増幅器等
のＣＡＴＶ用機器を駆動するための電源（通常はＡＣ６
０Ｖ）が重畳されていることに着目し、その電源を加入
者側へ伝送して加入者宅内のブースタや電話用端末機
（ＶＩＵ）等を動作させ、端末側が停電しても電話機能
だけは確保できるようにしたものである。施設側より加
入者宅側に同軸ケ−ブルを利用して電圧を送る場合は規
定（通商産業省令第６１号第２４９条）により３０Ｖ以
下で送電しなければならない。そこで本発明のＣＡＴＶ
用変圧機能付タップオフは、図１に示す様にＣＡＴＶシ
ステムに使用されるタップオフに、同システムの施設側
から高周波信号に重畳して送られる電源電圧を、加入者
宅内のＣＡＴＶ用機器の駆動に必要な電圧まで降圧する
降圧部１を設けてなるものである。In order to solve the above-mentioned problems, the present invention is a CATV system in which a high frequency signal sent from a facility side to a subscriber side is connected to a main line amplifier, a branch main line or the like of the CATV system. , A power supply (usually AC6) for driving a CATV device such as a main branch amplifier.
0V) is superposed, and its power is transmitted to the subscriber side to operate the booster in the subscriber's house or the telephone terminal (VIU), etc. This is something that can be secured. When sending voltage from the facility side to the subscriber's home side using a coaxial cable, it must be transmitted at 30V or less according to the regulations (Ministry of International Trade and Industry Ordinance No. 61, Article 249). Therefore, the CATV of the present invention
As shown in Fig. 1, the tap-off with transformer function is used to drive the CATV equipment in the subscriber's house by using the tap-off used in the CATV system and the power supply voltage superposed on the high-frequency signal from the facility side of the system. A step-down unit 1 that steps down to a required voltage is provided.
【０００５】[0005]
【発明の実施の形態１】本発明のＣＡＴＶ用変圧機能付
タップオフの実施の形態を図１に基づいて詳細に説明す
る。図１に示すＣＡＴＶ用変圧機能付タップオフは入力
端Ａと出力端Ｂの間に直列に設けられたコンデンサＣ
1 、Ｃ2 、両コンデンサＣ1 、Ｃ2 間に設けられた分岐
器Ｇ、分配器Ｈ、分配器Ｈと分岐出力端子Ｉ1 、Ｉ2 間
に設けられたコンデンサＣ3 、Ｃ4 、入力端Ａと出力端
Ｂの間に並列に設けられたチョークコイルＪ1 、Ｊ2 、
両チョークコイルＪ1 、Ｊ2 間に設けられたコンデンサ
Ｃ5とを備えていることにおいては図２のタップオフと
同じである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 The embodiment of the tap-off with a transformer function for CATV of the present invention will be described in detail based on FIG. The tap-off with a transformer function for CATV shown in FIG. 1 is a capacitor C provided in series between an input end A and an output end B.
1, C 2, both capacitors C 1, C turnout provided between 2 G, distributor H, distributor H and the branch output terminals I 1, a capacitor provided between the I 2 C 3, C 4, input Choke coils J 1 , J 2 , provided in parallel between the end A and the output end B,
The fact that the capacitor C 5 is provided between both choke coils J 1 and J 2 is the same as the tap-off in FIG.
【０００６】本発明では図１の鎖線で囲割れた降圧部１
と、降圧された電源を分岐出力端子Ｉ1 、Ｉ2 に伝送す
る電源伝送部２とを図２のタップオフに付加したもので
ある。この降圧部１はチョークコイルＪ1 、Ｊ2 間とア
ースとの間に降圧トランス３を設けてなる。降圧トラン
ス３はそれ以外のトランスであってもよい。In the present invention, the step-down portion 1 surrounded by the chain line in FIG.
2 and the power supply transmission unit 2 for transmitting the stepped down power supply to the branch output terminals I 1 and I 2 are added to the tap-off in FIG. The step-down unit 1 is provided with a step-down transformer 3 between the choke coils J 1 and J 2 and the ground. The step-down transformer 3 may be another transformer.
【０００７】図１の電源伝送部２は分配器Ｈから配線さ
れた２つの分配線４、５間にチョークコイルＪ3 、Ｊ4
を接続し、両チョークコイルＪ3 、Ｊ4 間と降圧トラン
ス３の巻線途中との間にチョークコイルＪ5 を設け、チ
ョークコイルＪ5 とアースとの間にコンデンサ6 を設け
てなる。The power transmission unit 2 of FIG. 1 has choke coils J 3 , J 4 between two distribution lines 4 and 5 wired from a distributor H.
, A choke coil J 5 is provided between the choke coils J 3 and J 4 and the winding of the step-down transformer 3, and a capacitor 6 is provided between the choke coil J 5 and ground.
【０００８】[0008]
【使用例】従来のタップオフに替えて本発明のＣＡＴＶ
用タップオフを使用し、ＣＡＴＶシステムの施設側から
同軸ケーブルに送り出される高周波信号に、同施設側の
無停電電源から電源（通常は６０Ｖ）を重畳させて加入
者側へ送ると、本発明のＣＡＴＶ用タップオフの入力端
Ａに入力した高周波信号は電源カット用のコンデンサＣ
1 、Ｃ2 を通過して出力端Ｂに出力される。一方、高周
波信号に重畳されている電源（低周波）はコンデサＣ
1 、Ｃ2 によりカットされて高周波伝送路６には流れ
ず、チョークコイルＪ1 、Ｊ2 を通して保安器の出力端
Ｂに出力される。このとき、電源は降圧トランス３にも
流れ、同トランス３の巻線途中から取出されて巻線比に
応じた電圧（通常は３０Ｖ）に降圧される。この電源は
チョークコイルＪ3 、Ｊ4 を通して夫々の分岐出力端Ｉ
1 、Ｉ2 に高周波信号と共に出力され、各分岐出力端Ｉ
1 、Ｉ2 に接続される保安器（図４のＫ）に供給され
る。このとき保安器Ｋに電源通過機能を備えた図３の保
安器（本件出願人が本件出願と同日付けで出願した保安
器）を使用すれば、図１の分岐出力端Ｉ1 、Ｉ2 から保
安器に入力された電源は同保安器を通過し、加入者側の
同軸ケーブルに接続される端末機器に供給されてそれら
を動作させることができる。この場合、加入者側に供給
される電源は施設側の無停電電源装置からの供給である
ため、加入者側が停電してもそれらの端末機器は停止す
ることなく作動し続ける。[Use Example] The CATV of the present invention instead of the conventional tap-off
When the tap-off is used and the high frequency signal sent from the facility side of the CATV system to the coaxial cable is superposed on the power source (usually 60 V) from the uninterruptible power source of the facility side and sent to the subscriber side, the CATV of the present invention is obtained. The high frequency signal input to the tap-off input terminal A is the capacitor C for cutting the power supply.
It is output to the output terminal B through 1 and C 2 . On the other hand, the power supply (low frequency) superimposed on the high frequency signal is the capacitor C.
It is cut by 1 and C 2 , does not flow in the high frequency transmission line 6, and is output to the output terminal B of the protector through the choke coils J 1 and J 2 . At this time, the power also flows to the step-down transformer 3, is taken out from the middle of the winding of the same transformer 3, and is stepped down to a voltage (usually 30 V) according to the winding ratio. This power supply is connected to each branch output terminal I through choke coils J 3 and J 4.
1 and I 2 are output together with the high frequency signal, and each branch output end I
1 and I 2 are supplied to the protector (K in FIG. 4). At this time, if the protector K having the power passage function shown in FIG. 3 (the protector filed by the applicant on the same date as the present application) is used, the branch output ends I 1 and I 2 of FIG. The power input to the protector passes through the protector and is supplied to the terminal equipment connected to the coaxial cable on the subscriber side so that they can be operated. In this case, since the power supplied to the subscriber side is supplied from the uninterruptible power supply device on the facility side, even if the subscriber side has a power failure, those terminal devices continue to operate without stopping.
【０００９】図３の電源通過機能付保安器は保安系路１
１と電源通過部１２とから構成され、保安系路１１は保
安器の入力端Ａと出力端Ｂとの間に直列に設けた電源カ
ット用のコンデンサＣ1 、Ｃ2 と、一端が入力端Ａの中
心導体とコンデンサＣ1 との間に接続され他端がアース
Ｅに接地されたアレスター（ＡＲＲ）１５と、一端が両
コンデンサＣ1 、Ｃ2 の間に接続され他端がアースＥに
接地されたチョークコイル１６と、一端が出力端Ｂの外
部導体に接続され他端がアースＥに接地されたコンデン
サＣ3 とから構成されている。電源通過部２は一次側と
二次側の巻線比が１対１の絶縁型トランス１３と、その
一次側に接続された一次側チョークコイル１７と、二次
側に接続された二次側チョークコイル１８と、ポジスタ
１９とから構成され、これが保安系路１１に並列に接続
されてなる。The protector with a power passage function shown in FIG.
1 and a power supply passage portion 12, and the protection system path 11 includes capacitors C 1 and C 2 for power supply cut, which are provided in series between an input end A and an output end B of the protector, and one end of which is an input end. An arrester (ARR) 15 connected between the center conductor of A and the capacitor C 1 and the other end grounded to the earth E, and one end connected between the capacitors C 1 and C 2 and the other end connected to the earth E. It is composed of a grounded choke coil 16 and a capacitor C 3 having one end connected to the outer conductor of the output end B and the other end grounded to the earth E. The power supply passage unit 2 includes an insulation type transformer 13 having a winding ratio of 1: 1 between the primary side and the secondary side, a primary side choke coil 17 connected to the primary side, and a secondary side connected to the secondary side. It is composed of a choke coil 18 and a posistor 19, which are connected in parallel to the security system path 11.
【００１０】本発明のＣＡＴＶ用タップオフを図３の電
源通過機能付保安器と組合わせて使用すると、同保安器
には保安系路１１があるため従来の保安器と同様にＣＡ
ＴＶシステムの施設側及び加入者側の設備を雷障害、高
圧混触等から保護することができる。また、本発明のＣ
ＡＴＶ用タップオフの分岐出力端Ｉ1 、Ｉ2 から保安器
の入力端Ａに入力された高周波信号は電源カット用のコ
ンデンサＣ1 、Ｃ2 を通過して出力端Ｂに出力される。
高周波信号に重畳されている電源はコンデンサＣ2 によ
りカットされて保安系路１１には流れず、一次側チョー
クコイル１７を通して絶縁型トランス１３の一次側に流
れ、それが同トランス１３の巻線比（１対１）に応じて
同トランスの２次側にそのまま出力され、二次側チョー
クコイル１８を通して保安器の出力端Ｂに出力される。
この結果、施設側から加入者側へ電源が供給され、この
電源により加入者側の同軸ケーブルに接続される端末機
器を常時、動作させることができる。When the CATV tap-off according to the present invention is used in combination with the protector with a power passage function shown in FIG. 3, since the protector has a security system path 11, the CATV is similar to the conventional protector.
It is possible to protect the facilities on the facility side and the subscriber side of the TV system from lightning damage, high voltage contact, etc. In addition, C of the present invention
The high frequency signal input from the branch output terminals I 1 and I 2 of the ATV tap-off to the input terminal A of the protector passes through the power cut capacitors C 1 and C 2 and is output to the output terminal B.
The power source superposed on the high frequency signal is cut by the capacitor C 2 and does not flow to the safety system path 11, but flows to the primary side of the insulation type transformer 13 through the primary side choke coil 17, which is the winding ratio of the transformer 13. According to (1: 1), it is directly output to the secondary side of the same transformer, and is output to the output terminal B of the protector through the secondary side choke coil 18.
As a result, power is supplied from the facility side to the subscriber side, and the terminal device connected to the coaxial cable on the subscriber side can always be operated by this power source.
【００１１】[0011]
【発明の効果】本発明のＣＡＴＶ用タップオフをＣＡＴ
Ｖシステムに使用すれば、ＣＡＴＶシステムの施設側の
増幅器用電源の一部を加入者側に供給するのに適する電
圧に降圧して供給することができる。このため同軸ケー
ブルに接続される加入者側の端末機器、特に、電話用端
末機を常時駆動させることができ、加入者側が停電して
もＣＡＴＶシステムの電話用端末機の動作を確保するこ
とができ、加入者側が停電しても電話だけは通話可能と
なる。The tap-off for CATV of the present invention is CAT.
When used in the V system, a part of the amplifier power supply on the facility side of the CATV system can be stepped down to a voltage suitable for supplying to the subscriber side and supplied. Therefore, the terminal equipment on the subscriber side, especially the telephone terminal equipment, connected to the coaxial cable can be driven at all times, and the operation of the telephone terminal equipment of the CATV system can be secured even if the subscriber equipment is out of power. Yes, even if the subscriber side loses power, only the telephone can talk.
【図１】本発明のＣＡＴＶ用タップオフの実施の形態を
示す結線図。FIG. 1 is a connection diagram showing an embodiment of a CATV tap-off according to the present invention.
【図２】従来のＣＡＴＶ用タップオフの説明図。FIG. 2 is an explanatory diagram of a conventional CATV tap-off.
【図３】本件出願人が本件出願と同日に出願した電源通
過機能付保安器の結線図。FIG. 3 is a wiring diagram of a protector with a power passage function, which the applicant filed on the same day as the application.
【図４】ＣＡＴＶシステムを利用した電話通信の説明
図。FIG. 4 is an explanatory diagram of telephone communication using the CATV system.
１は降圧部 1 is the step-down section
Claims (1)
に、同システムの施設側から高周波信号に重畳して送ら
れる電源電圧を、加入者宅内のＣＡＴＶ用端末機器の駆
動に必要な電圧まで降圧する降圧部を設けてなることを
特徴とするＣＡＴＶ用変圧機能付タップオフ。1. A step-down for tap-off used in a CATV system, in which a power supply voltage superposed on a high-frequency signal from a facility side of the system is sent to a voltage required for driving a CATV terminal device in a subscriber's house. Tap-off with a transformer function for CATV, which is characterized by having a section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24671295A JP3614950B2 (en) | 1995-08-30 | 1995-08-30 | Tap-off with transformer function for CATV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24671295A JP3614950B2 (en) | 1995-08-30 | 1995-08-30 | Tap-off with transformer function for CATV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0969964A true JPH0969964A (en) | 1997-03-11 |
| JP3614950B2 JP3614950B2 (en) | 2005-01-26 |
Family
ID=17152528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24671295A Expired - Fee Related JP3614950B2 (en) | 1995-08-30 | 1995-08-30 | Tap-off with transformer function for CATV |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3614950B2 (en) |
-
1995
- 1995-08-30 JP JP24671295A patent/JP3614950B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3614950B2 (en) | 2005-01-26 |
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