JPS61148985A - Transmission circuit of catv - Google Patents

Transmission circuit of catv

Info

Publication number
JPS61148985A
JPS61148985A JP59271568A JP27156884A JPS61148985A JP S61148985 A JPS61148985 A JP S61148985A JP 59271568 A JP59271568 A JP 59271568A JP 27156884 A JP27156884 A JP 27156884A JP S61148985 A JPS61148985 A JP S61148985A
Authority
JP
Japan
Prior art keywords
amplifier
unit
switches
bypass
catv
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
JP59271568A
Other languages
Japanese (ja)
Inventor
Norikane Nakamaru
中丸　則兼
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP59271568A priority Critical patent/JPS61148985A/en
Publication of JPS61148985A publication Critical patent/JPS61148985A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To minimize the damage in case of a fault in the amplifier or power failure when occurred by providing a bypass rout in the amplifier and by selecting either one of the two transmission lines via the amplifier/bypass rout depending on on/off of the drive power supply to the amplifier. CONSTITUTION:In the CATV line 11, the amplifiers 14a, 14b... are connected in series. The amplification unit of each of the amplifiers 14a, 14b... is provided with switches 17 and 18 in its front and rear. The unit 16 and the bypass rout 15 are connected parallel through the switches 17 and 18. The current supplied from a power supplyer 20 to the unit 16 activates a relay circuit 19 so that the switches 17 and 18 are connected to the unit 16 side and that the signal level of the line 11 is maintained. In result, when, for instance, the unit 16 becomes faulty, the power supply is disconnected, or when the current supply from the supplyer 20 is cut off, the relay 19 becomes off and the switches 17 and 18 are switched, and consequently, the TV signal passes through the bypass route 15. Therefore, the signal level is not amplified in this unit, however, the stoppage of the wave prevented.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

本発明は、ＣＡＴＶにおいて、ＴＶ信号の伝送過程にお
ける信号レベルを維持するためにＣＡＴＶラインに増幅
器を設置しているＣＡＴＶの伝送回路に関するものであ
る。The present invention relates to a CATV transmission circuit in which an amplifier is installed in the CATV line in order to maintain the signal level during the TV signal transmission process.

【従来の技術】[Conventional technology]

この種の伝送回路としては、第１図にみられる構成のも
のが知られている。ここでは、センター側から送られる
ＴＶ信号は、ＣＡＴＶライン１を介して各端末２へ分配
されるが、途中には伝送過程における信号レベルを維持
するために増幅器３が設けられており、上記増幅器３の
増幅ユニット４には、ｆＩＩＩｌｌ供給器５により商用
電源が必要電源として供給されている。 このような構成では、ＣＡＴＶライン１上の１個所で、
地域的な停電あるいは故障にて増幅ユニット４が働らか
なくなると、その後段におけるＣＡＴＶ受信ができなく
なるなどの被害を生じてしまう。As this type of transmission circuit, one having the configuration shown in FIG. 1 is known. Here, a TV signal sent from the center side is distributed to each terminal 2 via a CATV line 1, but an amplifier 3 is provided along the way to maintain the signal level during the transmission process. Commercial power is supplied to the amplification unit 4 of No. 3 as a necessary power by a fIIIll supply device 5. In such a configuration, at one location on CATV line 1,
If the amplification unit 4 stops working due to a regional power outage or failure, damage will occur such as the inability to receive CATV in subsequent stages.

【発明が解決しようとする問題点１ 本発明は、上記事情にもとづいてなされたもので、増幅
器が故障したり、あるいはその駆動ｉ源が断たれた時に
、ＴＶ信号を通すスルー回路を設けることで、全体的な
被害を最小限にとどめるように工夫したＣＡＴＶの伝送
回路を提供しようとするものである。 【問題点を解決するための手段】 この目的のため、本発明は、ＣＡＴＶライン中に直列配
置で多数の増幅器を設置し、各増幅器を各別の電源で駆
動するように構成したものにおいて、上記増幅器にバイ
パス路を設け、上記増幅器への駆動電源のオン・オフで
増幅器経由がバイパス路経由の伝送を各層幅器毎に選択
丈る構成にしたことを特徴とするものである。[Problem to be solved by the invention 1] The present invention has been made based on the above-mentioned circumstances, and provides a through circuit for passing TV signals when the amplifier fails or its driving source is cut off. The purpose of the present invention is to provide a CATV transmission circuit that is designed to minimize overall damage. [Means for Solving the Problems] For this purpose, the present invention provides a configuration in which a large number of amplifiers are installed in series in a CATV line, and each amplifier is driven by a separate power supply. The present invention is characterized in that the amplifier is provided with a bypass path, and transmission via the amplifier or via the bypass path can be selected for each layer width device by turning on/off the drive power to the amplifier.

【実　施　例】【Example】

以下、本発明の一実施例を第２図を参照して具体的に説
明する。 図において符号１１はＣＡＴＶラインであり、分配器１
２を介して各端末１３に分配され、ＴＶ受信機１０で受
信される。上記ＣＡＴＶライン１１上には、直列配列で
増幅器１４ａ、１４ｂ、・・・が設置されていて、各増
幅器ｆ４ａ、　１４ｂ、・・・には、バイパス路１５が
設置されている。すなわち上記増幅Ｎ１４ａ、１４ｂ、
・・・は、それぞれ増幅ユニット１６のＩｙＩＷ＆に切
換スイッチ１７゜１８を具備しており、上記切換スイッ
チ１７．１８を介して増幅ユニット１６とバイパス路１
５とを並列配置しており、上記切換スイッチ１７．１８
を、リレー回路１９で制御できるようにしである。 そして電源供給器２０により、増幅ユニット１６に与え
た電流でリレー回路１９を働かせ、切換スイッチ１γ、
１８を増幅ユニット１Ｇ側にて（図面の表示状態）、Ｃ
ＡＴＶライン１１の信号レベルを維持するのである。そ
して例えば、増幅ユニット１６の故障時に電源を断とす
るか、あるいは電源供給器２０に接続されているＹｌａ
が断たれさた時（停電時）には、リレー回路９が切れて
切換スイッチ１７．１８が切換わり、ＴＶ信号はバイパ
ス路１５を通ることになる。従ってここでの信号レベル
の増強はないが、後段への停波は避けられる。 第３図にみられるのは、上記伝送回路の構成をＣＡＴＶ
ラインの家庭用回線に組込んだ例を示している。ここで
は第１段の増幅器１４ａが故障しても、ＴＶ受信機１０
への停波は避けられる。また補助電源の使用（符号２１
で示す）で、別の増幅Ｗ１４ｂを働かせることができる
。Hereinafter, one embodiment of the present invention will be specifically described with reference to FIG. In the figure, reference numeral 11 is a CATV line, and the distributor 1
2 to each terminal 13 and received by the TV receiver 10. Amplifiers 14a, 14b, . . . are installed in series on the CATV line 11, and a bypass path 15 is installed in each amplifier f4a, 14b, . That is, the amplification N14a, 14b,
... are respectively equipped with changeover switches 17 and 18 at IyIW& of the amplification unit 16, and the amplification unit 16 and the bypass path 1 are connected via the changeover switches 17 and 18.
5 are arranged in parallel, and the above changeover switches 17 and 18
can be controlled by the relay circuit 19. Then, the power supply 20 operates the relay circuit 19 with the current given to the amplification unit 16, and the changeover switch 1γ,
18 on the amplification unit 1G side (as shown in the drawing), C
The signal level of the ATV line 11 is maintained. For example, when the amplification unit 16 fails, the power is cut off, or the Yla connected to the power supply 20 is turned off.
When the power supply is cut off (during a power outage), the relay circuit 9 is cut off, the changeover switches 17 and 18 are switched, and the TV signal passes through the bypass path 15. Therefore, although there is no signal level enhancement here, stopping the signal to the subsequent stage can be avoided. What can be seen in Figure 3 is the configuration of the above transmission circuit.
An example is shown in which the system is incorporated into a home line. Here, even if the first stage amplifier 14a fails, the TV receiver 10
Stoppages at sea can be avoided. Also, use of auxiliary power supply (code 21
), another amplification W14b can be activated.

【発明の効果】【Effect of the invention】

本発明は、以上詳述したようになり、増幅器の故障時や
、あるいは部分的な停電時には、システム全体への停波
を防止でき、被害を最小限にとどめることができる。The present invention has been described in detail above, and in the event of an amplifier failure or a partial power outage, the entire system can be prevented from being stopped, and damage can be minimized.

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

第１図は従来例の構ｔｃ図、１２図は本発明の一次子例
の構成図、第３図は家庭内設置状態を示す別の実施例の
構成図である。 １０・・・ＴＶ受信機、１１・・・ＣＡＴＶライン、１
２・・・分配器、１３・・・端末、１４ａ、１４ｂ・・
・増幅器、１５．・・バイパス路、１６・・・増幅ユニ
ット、１７．　Ｈｌ・・・切換スイッチ、１９・・・リ
レー回路、２ｏ・・・ｌｌ電源供給器２１・・・補助′
Ｒ源。 ゛　特許出願人　　　　パイオニア株式会社代理人　弁
理士　　小　橋　信　浮 量　　弁理士　　村　井　　　進 オＰユ０ 声？６０FIG. 1 is a structural diagram of a conventional example, FIG. 12 is a structural diagram of a primary child example of the present invention, and FIG. 3 is a structural diagram of another embodiment showing a state of installation in a home. 10...TV receiver, 11...CATV line, 1
2...Distributor, 13...Terminal, 14a, 14b...
・Amplifier, 15. ... Bypass path, 16... Amplification unit, 17. Hl...Selector switch, 19...Relay circuit, 2o...ll power supply 21...Auxiliary'
R source.゛ Patent Applicant Pioneer Co., Ltd. Agent Patent Attorney Nobu Kobashi Ukasa Patent Attorney Susumu Murai Pyu0 Voice? 60

Claims (1)

【特許請求の範囲】[Claims] ＣＡＴＶライン中に直列配置で多数の増幅器を設置し、
各増幅器を各別の電源で駆動するように構成したものに
おいて、上記増幅器にバイパス路を設け、上記増幅器へ
の駆動電源のオン・オフで増幅器経由かバイパス路経由
の伝送を各増幅器毎に選択する構成にしたことを特徴と
するＣＡＴＶの伝送回路。A large number of amplifiers are installed in series in the CATV line,
In a configuration in which each amplifier is driven by a separate power supply, a bypass path is provided in the above amplifier, and transmission via the amplifier or via the bypass path is selected for each amplifier by turning on/off the drive power to the above amplifier. A CATV transmission circuit characterized by having a configuration in which:
JP59271568A 1984-12-21 1984-12-21 Transmission circuit of catv Pending JPS61148985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59271568A JPS61148985A (en) 1984-12-21 1984-12-21 Transmission circuit of catv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59271568A JPS61148985A (en) 1984-12-21 1984-12-21 Transmission circuit of catv

Publications (1)

Publication Number Publication Date
JPS61148985A true JPS61148985A (en) 1986-07-07

Family

ID=17501892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59271568A Pending JPS61148985A (en) 1984-12-21 1984-12-21 Transmission circuit of catv

Country Status (1)

Country Link
JP (1) JPS61148985A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382271A (en) * 1989-08-25 1991-04-08 Yagi Antenna Co Ltd Line switch for catv
JPH06189451A (en) * 1993-07-01 1994-07-08 Miharu Tsushin Kk Method for feeding power to catv amplifier
US7420294B2 (en) 2005-12-23 2008-09-02 Maya Industries Limited Smart power switch for broadband communications network
EP2736266A1 (en) * 2012-11-21 2014-05-28 ams AG Signal processing device and active headphone with such a signal processing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382271A (en) * 1989-08-25 1991-04-08 Yagi Antenna Co Ltd Line switch for catv
JPH06189451A (en) * 1993-07-01 1994-07-08 Miharu Tsushin Kk Method for feeding power to catv amplifier
US7420294B2 (en) 2005-12-23 2008-09-02 Maya Industries Limited Smart power switch for broadband communications network
US7898108B2 (en) 2005-12-23 2011-03-01 Maya Industries Limited Smart power switch for broadband communications network
EP2736266A1 (en) * 2012-11-21 2014-05-28 ams AG Signal processing device and active headphone with such a signal processing device

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