JPS6032447A - Folded circuit of two-wire carrier line by group - Google Patents
Folded circuit of two-wire carrier line by groupInfo
- Publication number
- JPS6032447A JPS6032447A JP58141160A JP14116083A JPS6032447A JP S6032447 A JPS6032447 A JP S6032447A JP 58141160 A JP58141160 A JP 58141160A JP 14116083 A JP14116083 A JP 14116083A JP S6032447 A JPS6032447 A JP S6032447A
- Authority
- JP
- Japan
- Prior art keywords
- group
- line
- low
- amplifier
- filter
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、短距離搬送多重通信回線として使用されてい
る群別２線式搬送回線の試験等のための折返し回路に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loopback circuit for testing group-based two-wire carrier lines used as short-distance carrier multiplex communication lines.
群別２線式搬送回線とは、送信および受信の周波数帯域
を低群（例えば１２〜６０キロヘルツ）と高群（７２〜
１２０キロヘルツ）に群別して１対の搬送ケーブル心線
（２線）によって両方向の信号を伝送する方式である。A group-specific two-wire carrier line is a transmission and reception frequency band that is divided into a low group (for example, 12 to 60 kilohertz) and a high group (72 to 60 kilohertz).
This method transmits signals in both directions using a pair of carrier cable cores (2 wires) in groups of 120 kHz).
端局間の伝送距離が長くなった場合には、約１０キロメ
ートルごとに中継装置を設置して線路損失の増幅補正を
行なっている。When the transmission distance between terminal stations becomes long, repeaters are installed approximately every 10 kilometers to amplify and compensate for line loss.
従来、上述の搬送回線の定期点検２回線品質チェック等
を行なう場合は、両端局に人員を配置して、２組の測定
器を用意して端局間対向状態で各種の試験を実施してい
る。従って、試験のために多大の労力および時間がかか
るという欠点がある。Conventionally, when carrying out the above-mentioned periodic inspection and line quality check of the carrier line, personnel were assigned to both terminal stations, two sets of measuring instruments were prepared, and various tests were conducted with the terminal stations facing each other. There is. Therefore, there is a drawback that it requires a lot of effort and time for testing.
本発明の目的は、上述の従来の欠点を解決し、任意の中
継装置または他方の端局装置で低群または高群を高群ま
たは低群へ折返すことにより一方の端局から試験するこ
とを可能とした群別２線式搬送回線の折返し回路を提供
することにある。An object of the present invention is to solve the above-mentioned conventional drawbacks and to test from one terminal station by folding back the low group or high group to the high group or low group at any relay device or other terminal device. It is an object of the present invention to provide a return circuit for group-based two-wire transport lines that enables the following.
本発明の折返し回路は、群別２線式搬送回線の各中継装
置およびまたは端局装置において、低群または高群周波
数帯域を通過させる帯域ろ波器と、低群または高群用線
路増幅器の出力信号を高群または低群用帯域に変換する
ための周波数変換手段と、該周波数変換手段の出力を高
群または低群側へ折返し接続する切替スイッチと、端局
装置からの信号によって前記周波数変換手段および切替
スイッチを駆動する駆動手段とを備えて、一方の端局装
置から特定の中継装置または他方の端局装置の前記駆動
手段を選択駆動することにより当該中継装置等の低群ま
たは高群用線路増幅器の出力を高群または低群用帯域に
周波数変換して折返し接続することを特徴とする。The folding circuit of the present invention includes a bandpass filter that passes the low group or high group frequency band, and a line amplifier for the low group or high group in each repeating device and/or terminal device of a group-based two-wire carrier line. A frequency conversion means for converting the output signal into a high group or low group band; a changeover switch for connecting the output of the frequency conversion means back to the high group or low group side; A converting means and a driving means for driving a changeover switch are provided, and by selectively driving the driving means of a specific relay device or the other terminal device from one terminal device, the relay device etc. can be set to a low group or a high group. It is characterized in that the output of the group line amplifier is frequency-converted to a high group or low group band and then connected back.
次に、本発明について、図面を参照して詳細に説明する
。Next, the present invention will be explained in detail with reference to the drawings.
図は、本発明の一実施例を示すブロック図である。すな
わち、各中継装置は、ケーブル線路Ｌから入力した低群
信号を方向ろ波器２によって分離抽出し、低群用線路増
幅器４によって増幅した後、方向ろ波器２′を介してケ
ーブル線路Ｌ′に送出する。The figure is a block diagram showing one embodiment of the present invention. That is, each repeater separates and extracts the low group signal input from the cable line L using the directional filter 2, amplifies it using the low group line amplifier 4, and then outputs the low group signal input from the cable line L via the directional filter 2'. ’.
ケーブル線路Ｌ′から入力した高群信号は、同様に方向
ろ波器２′を通って高群用線路増幅器３で増幅され、方
向流波器２を介してケーブル線路Ｌに送出される。また
、低群用線路増幅器４の出力信号は、低群周波数帯域を
通過させる帯域ろ波器６によって分岐されて変調器８に
入力され、発振器７の出力周波数によって変潤されて高
群周波数帯域に変換され、低域通過ろ波器９によって不
要波が除去されて、切替スイッチ１０の動作接点に供給
される。切替スイッチ１０は、方向ろ波器２′の高群側
出力と高群用線路増幅器３の入力との間に挿入されたス
イッチであって、平常接点側は図示実線のように接続さ
れ、動作時には図示点線のように低域通過ろ波器９の出
力を高群用線路増幅器３の入力に接続する。該切替スイ
ッチ１０および前記発振器７は、帯域ろ波器５の出力に
よって駆動される。帯域ろ波器５は、各中継装置ごとに
割当てられた固有の周波数を通過させる帯域ろ波器であ
る。The high group signal inputted from the cable line L' similarly passes through the directional filter 2', is amplified by the high group line amplifier 3, and is sent to the cable line L via the directional wave filter 2. Further, the output signal of the low group line amplifier 4 is branched by a bandpass filter 6 that passes the low group frequency band, inputted to the modulator 8, and is modulated by the output frequency of the oscillator 7 to pass the low group frequency band. , unnecessary waves are removed by the low-pass filter 9, and the signal is supplied to the operating contact of the changeover switch 10. The changeover switch 10 is a switch inserted between the high-group side output of the directional filter 2' and the input of the high-group line amplifier 3, and the normal contact side is connected as shown by the solid line in the figure and operates. Sometimes, the output of the low-pass filter 9 is connected to the input of the high group line amplifier 3 as shown by the dotted line in the figure. The changeover switch 10 and the oscillator 7 are driven by the output of the bandpass filter 5. The bandpass filter 5 is a bandpass filter that passes a unique frequency assigned to each relay device.
従って、一方の端局装置から、試験用測定器Ｔによって
、特定の周波数（ｆ１、ｆ２、・・・ｆＮ）の信号を低
群用増幅器１０の入力に供給することにより、該周波数
に対応する中継装置では帯域ろ波器５の出力によって発
振器７および切替スイッチ１０が駆動され、低群回線は
当該中継装置で高群側に折返し接続される。次に、試験
用測定器Ｔの内蔵する特性試験用の発振器（１２〜６０
キロヘルツ）の出力を送出すれば、該信号は前期中継装
置で高群帯域の信号に変換されて切替スイッチ１０を介
して高群側に折返し送出される。すなわち、端局装置側
で高群用線路増幅器３の出力をレベルメータで測定する
ことによって、折返し回線の伝送特性等各種の測定をす
ることができる。Therefore, by supplying a signal of a specific frequency (f1, f2, . . . fN) from one end station device to the input of the low group amplifier 10 using the test measuring instrument T, In the relay device, an oscillator 7 and a changeover switch 10 are driven by the output of the bandpass filter 5, and the low group line is connected back to the high group side in the relay device. Next, the oscillator (12 to 60
If an output of (kilohertz) is transmitted, the signal is converted into a high group band signal by the first repeater and sent back to the high group side via the changeover switch 10. That is, by measuring the output of the high group line amplifier 3 with a level meter on the terminal equipment side, various measurements such as the transmission characteristics of the return line can be made.
相手側端局装置にも同様な折返し回路を設けておけば、
全区間を通しての折返し試験が可能となることは勿論で
ある。If a similar loopback circuit is provided at the other party's terminal equipment,
Needless to say, it is possible to conduct repeat tests over the entire section.
以上のように、本発明においては、各中継装置および又
は端局装置に、低群帯域信号を高群帯域信号に、または
その逆の周波数変換をする周波数変換手段と、該周波数
変換手段の出力を高群または低群側へ接続する切替スイ
ッチとを備えて、一方の端局装置から任意の中継装置ま
たは相手側端局装置を指定して前記周波数変換手段およ
び切替スイッチを駆動して低群から高群へ、または高群
から低群へ折返し接続できるように構成したから、一方
の端局装置から折返しによる搬送回線の試験等が可能と
なり、また、試験のための相手側端局装置の測定器およ
び人員の配置が不要となるという効果がある。As described above, in the present invention, each relay device and/or terminal device includes a frequency conversion means for frequency converting a low group band signal to a high group band signal or vice versa, and an output of the frequency conversion means. and a changeover switch for connecting the frequency converter and the changeover switch to the high group or low group side, and one terminal station device specifies an arbitrary relay device or the other end station device and drives the frequency conversion means and the changeover switch to connect the frequency converter and the changeover switch to the low group side. Since it is configured so that loopback connections can be made from the high group to the high group or from the high group to the low group, it is possible to test the carrier line by looping back from one end station device, and also to connect the other end station device for testing. This has the effect of eliminating the need for measuring instruments and personnel.
図は本発明の一実施例を示すブロック図である。
図において、１・・・低群用増幅器、２．２′・・・方
向ろ波器、３・・・高群用線路増幅器、４・・・低群用
線路増幅器、５，６・・・帯域ろ波器、７・・・発振器
、８・・・変調器、９・・・低域通過ろ波器、１０・・
・切替スイッチ。
代理人 弁理士 住田俊宗The figure is a block diagram showing one embodiment of the present invention. In the figure, 1... amplifier for low group, 2.2'... directional filter, 3... line amplifier for high group, 4... line amplifier for low group, 5, 6... band filter, 7... oscillator, 8... modulator, 9... low pass filter, 10...
・Selector switch. Agent Patent Attorney Toshimune Sumita
Claims (1)
において、低群または高群周波数帯域を通過させる帯域
ろ波器と、低群または高群用線路増幅器の出力信号を高
群または低群用帯域に変換するための周波数変換手段と
、該周波数変換手段の出力を高群または低群側へ折返し
接続する切替スイッチと、端局装置からの信号によって
前記周波数変換手段および切替スイッチを駆動する駆動
手段とを備えて、一方の端局装置から特定の中継装置ま
たは他方の端局装置の前記駆動手段を選択駆動すること
により当該中継装置等の低群または高群用線路増幅器の
出力を高群または低群用帯域に周波数変換して折返し接
続することを特徴とする群別２線式搬送回線の折返し回
路。In each repeating device and/or end station device of the group-specific two-wire carrier line, a bandpass filter that passes the low group or high group frequency band and an output signal of the line amplifier for the low group or high group are used to pass the low group or high group frequency band. A frequency conversion means for converting to a group band, a changeover switch for connecting the output of the frequency conversion means back to the high group or low group side, and driving the frequency conversion means and the changeover switch by a signal from a terminal device. and a driving means for selectively driving a specific relay device or the driving means of the other terminal device from one terminal device, thereby controlling the output of the low group or high group line amplifier of the relay device, etc. A folding circuit for a group-specific two-wire carrier line, characterized in that the frequency is converted to a band for a high group or a low group and the loop connection is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141160A JPS6032447A (en) | 1983-08-03 | 1983-08-03 | Folded circuit of two-wire carrier line by group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141160A JPS6032447A (en) | 1983-08-03 | 1983-08-03 | Folded circuit of two-wire carrier line by group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6032447A true JPS6032447A (en) | 1985-02-19 |
Family
ID=15285523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58141160A Pending JPS6032447A (en) | 1983-08-03 | 1983-08-03 | Folded circuit of two-wire carrier line by group |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6032447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473579A (en) * | 1982-01-26 | 1984-09-25 | American Cyanamid Company | Antiatherosclerotic tetrasubstituted ureas and thioureas |
-
1983
- 1983-08-03 JP JP58141160A patent/JPS6032447A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473579A (en) * | 1982-01-26 | 1984-09-25 | American Cyanamid Company | Antiatherosclerotic tetrasubstituted ureas and thioureas |
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