JPH02214344A - Digital signal modulator/demodulator - Google Patents
Digital signal modulator/demodulatorInfo
- Publication number
- JPH02214344A JPH02214344A JP1036501A JP3650189A JPH02214344A JP H02214344 A JPH02214344 A JP H02214344A JP 1036501 A JP1036501 A JP 1036501A JP 3650189 A JP3650189 A JP 3650189A JP H02214344 A JPH02214344 A JP H02214344A
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- signal
- sent
- line
- optical cable
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Optical Communication System (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Dc Digital Transmission (AREA)
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はディジタル信号変復調装置に関し、特にディジ
タル通信回線を構成する回線制御装置ならびに変復調装
置間を接続する通信ケーブルからの漏洩を改良したディ
ジタル信号変復調装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital signal modulation/demodulation device, and in particular to a digital signal modulation/demodulation device that improves leakage from a line control device constituting a digital communication line and a communication cable connecting the modulation/demodulation devices. It relates to a modem device.
近年、電磁環境工学（以下ＥＭＣ（Ｅｌｅｃｔｒｏ Ｍ
ａｇｎｅｔｉｃ Ｃｏｍｐａｔｉｂｉｌｉｔｙ）という
）の重要性がいわれている。ＥＭＣは電磁波妨害である
ＥＭＩ（Ｅｌｅｃｔｒｏ Ｍａｇｎｅｔｉｃ Ｉｏｔｅ
ｒｆｅｒｅｎｃｅ）と電磁感受性であるＥ Ｍ Ｓ （
Ｅｌｅｃｔｒｏ Ｍａｇｎｅｔｉｃ ５ｕｓｃｅｐｔｉ
ｂｉｌｉｔｙ）とがある、−例として、ＥＭＩの規格は
、米国のＦＣＣｒｅｇｕｌａｔｉｏｎ Ｌｉｔｌｅ ４
７ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎ。In recent years, electromagnetic environment engineering (EMC)
The importance of "agnetic compatibility" is said to be important. EMC stands for electromagnetic interference (EMI).
rference) and electromagnetic susceptibility, E M S (
Electro Magnetic 5uscepti
For example, the EMI standard is the US FCC Regulation Litele 4.
7 Telecommunication.
ｃｈａｐｔ １５ ｓｕ６°ｐａｒｔＪ Ｐ２Ｓ５〜５
１１にあるように、商業環境に対する電磁波妨害がクラ
スＡとして規定されている０例えば放射性雑音が測定間
隔３メータの場合、周波数３０〜９０ Ｍ Ｈｚの間で
５０ｄｂμＶ以下と規格化されている。従来、ディジタ
ル通信回線を構成する装置は、第２図のブロック図に示
すように、変調装置７Ａ、ＩＯＡ、復調装置８Ａ、９Ａ
、回線制御装置５Ａ、６Ａ、制御信号ケーブル１１〜１
４、伝送ライン１１．１２から構成される。今、変調装
置７Ａに入力された入力信号は変調されて伝送ライン１
１により伝送された後、復調装置８Ａにより復調される
。なお、伝送ライン１１は無線回線等で構成される場合
もある。一方、伝送ラインの回線切替ならびに監視等を
行う回線制御信号を授受する回線制御装置５Ａの制御信
号１５も変調装置７Ａ、伝送ライン１１、復調装置８Ａ
を経由して回線制御装置６Ａに伝達される。また、前述
の回線切替等に必要な確認応答信号ならび反対方向の伝
送ライン１２の制御信号も前述と同様の手順で変調装置
１０Ａ、伝送ライン１２．復調装置９Ａを経由して回線
制御装置６Ａ、５Ａ間で制御信号の授受が行われる。chapter 15 su6°partJ P2S5~5
11, electromagnetic wave interference in a commercial environment is defined as class A. For example, when radiation noise is measured at a measurement interval of 3 meters, it is standardized to be 50 dbμV or less between frequencies 30 and 90 MHz. Conventionally, devices constituting a digital communication line include a modulator 7A, an IOA, and demodulators 8A and 9A, as shown in the block diagram of FIG.
, line control devices 5A, 6A, control signal cables 11-1
4. Consists of transmission lines 11 and 12. Now, the input signal input to the modulator 7A is modulated and transmitted to the transmission line 1.
1 and then demodulated by demodulator 8A. Note that the transmission line 11 may be configured with a wireless line or the like. On the other hand, the control signal 15 of the line control device 5A, which sends and receives line control signals for switching and monitoring the transmission line, is also transmitted to the modulator 7A, the transmission line 11, and the demodulator 8A.
It is transmitted to the line control device 6A via. Further, an acknowledgment signal necessary for the above-mentioned line switching, etc. and a control signal for the transmission line 12 in the opposite direction are also sent to the modulation device 10A, the transmission line 12. Control signals are exchanged between the line control devices 6A and 5A via the demodulator 9A.
ここで制御信号ケーブル１１〜１４は約３５ Ｍ Ｈ２
程度の制御信号を伝送するが、この制御信号ケーブル１
１〜１４からの制御信号のてい倍波が電磁波として漏洩
していた。Here, the control signal cables 11 to 14 are approximately 35 MH2
This control signal cable 1
The harmonics of the control signals from 1 to 14 were leaking as electromagnetic waves.
上述した従来のディジタル信号変復調装置にあっては、
制御信号が制御信号ケーブルを介して伝送されるため、
制御信号ケーブルから電磁波が放射され、この放射電磁
波が前述のＥＭＣの規格を満足することができないとい
う欠点があった。In the conventional digital signal modulation/demodulation device described above,
Because the control signal is transmitted through the control signal cable,
Electromagnetic waves are radiated from the control signal cable, and this radiated electromagnetic wave has a disadvantage in that it cannot satisfy the above-mentioned EMC standards.
本発明のディジタル信号は、ディジタル化された制御信
号を伝送する回線制御装置と変調または復調装置との間
に接続ケーブルを有するディジタル信号変復調装置にお
いて、送信側変調装置または受信側復調装置と回線制御
装置との間の制御信号を光ケーブルを使用して伝送する
。The digital signal of the present invention can be used in a digital signal modulation/demodulation device that has a connection cable between a line control device that transmits a digitized control signal and a modulation or demodulation device. Control signals to and from the device are transmitted using optical cables.
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。第２図
と同じ構成の部分すなわち伝送ライン１１．１２は同一
符号により示している。第１図において変調装置７に入
力された入力信号と回線制御装置５から、光ケーブル１
により伝送されてきた制御信号とを変調装置７で変調す
る。変調された信号は伝送ライン１１で伝送された後、
復調装置８に入力され復調される。復調された信号から
制御信号が抽出され、光ケーブル２を介して回線制御装
置６に送られ制御信号が授受される。また、反対側の回
線も前述と同様の手順で、光ケーブル４．変調装置１０
．伝送ライン１２．復調装置９．光ケーブル３の経路で
反対側回線の制御信号が授受される。ここで回線制御装
置５と変調装置７との間および復調装置８と回線制御装
置６との間は、従来の電気信号である制御信号を光を媒
体として伝送するので、電気信号を光信号に変換する光
電変換器（図示せず）が回線制御装置５゜６ならびに変
調装置７．復調装置８に付加されている。反対側回線の
回線制御装置６と変調装置１０との間および復調装置９
と回線制御装置５との間についても同様に光電変換器（
図示せず）が付加されている。このようにして制御信号
は光ケーブルにより送られるため、従来のような制御信
号ケーブルから漏洩する電磁放射を防ぐことができる。FIG. 1 is a block diagram of one embodiment of the present invention. Parts having the same structure as in FIG. 2, ie transmission lines 11, 12, are designated by the same reference numerals. In FIG. 1, the input signal input to the modulation device 7 and the optical cable 1
The modulator 7 modulates the control signal transmitted by the modulator 7. After the modulated signal is transmitted on the transmission line 11,
The signal is input to demodulator 8 and demodulated. A control signal is extracted from the demodulated signal and sent to the line control device 6 via the optical cable 2, where the control signal is exchanged. Also, for the line on the opposite side, follow the same procedure as described above using optical cable 4. Modulation device 10
．． Transmission line 12. Demodulator 9. Control signals for the opposite line are exchanged along the path of the optical cable 3. Here, between the line control device 5 and the modulation device 7 and between the demodulation device 8 and the line control device 6, the control signal, which is a conventional electric signal, is transmitted using light as a medium, so the electric signal is converted into an optical signal. A photoelectric converter (not shown) for conversion is connected to the line control device 5.6 and the modulation device 7. It is added to the demodulator 8. Between the line control device 6 and the modulation device 10 of the opposite side line and the demodulation device 9
Similarly, a photoelectric converter (
(not shown) is added. In this way, the control signal is sent via the optical cable, thereby preventing electromagnetic radiation from leaking from the conventional control signal cable.
したがって、前述したＦＣＣの規則にある電磁波妨害の
規格にていしよくしない回線制御装置と変復調装置間の
信号接続を実現することができる。Therefore, it is possible to realize a signal connection between the line control device and the modulation/demodulation device that does not meet the standards for electromagnetic interference in the aforementioned FCC regulations.
以上のごとく本発明は光ケーブルにより装置間接続を行
っているので、制御信号により接続ケーブルから漏洩す
る電磁放射を防ぐことができるという効果がある。また
、ＦＣＣの電磁波妨害の規則等に拘束されない通信装置
を構成できる効果がある。As described above, since the present invention connects devices using optical cables, it is effective in preventing electromagnetic radiation leaking from the connection cables by control signals. Furthermore, it is possible to configure a communication device that is not bound by the FCC regulations regarding electromagnetic interference.
第１図は本発明の一実施例のブロック図、第２図は従来
のディジタル信号変復調装置のブロック図である。
１．２，３．４・・・光ケーブル、５，６．５Ａ。
６ Ａ−・・回線制御装置、７，１０．７Ａ、ＩＯＡ・
・・変調装置、８，９．８Ａ、９Ａ・・・復調装置、１
１１２・・・伝送ライン、１３〜１６・・・制御信号ケ
ーブル。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional digital signal modulation/demodulation device. 1.2, 3.4... Optical cable, 5, 6.5A. 6 A-...Line control device, 7, 10.7A, IOA・
...Modulation device, 8, 9.8A, 9A...Demodulation device, 1
112...Transmission line, 13-16...Control signal cable.
Claims (1)
変調または復調装置との間に接続ケーブルを有するディ
ジタル信号変復調装置において、送信側変調装置または
受信側復調装置と回線制御装置との間の制御信号を光ケ
ーブルを使用して伝送することを特徴とするディジタル
信号変復調装置。In a digital signal modulation/demodulation device that has a connection cable between a line control device that transmits digitized control signals and a modulation or demodulation device, the control signal between the transmitting side modulation device or the receiving side demodulation device and the line control device A digital signal modulation/demodulation device that transmits signals using an optical cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1036501A JPH02214344A (en) | 1989-02-15 | 1989-02-15 | Digital signal modulator/demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1036501A JPH02214344A (en) | 1989-02-15 | 1989-02-15 | Digital signal modulator/demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02214344A true JPH02214344A (en) | 1990-08-27 |
Family
ID=12471573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1036501A Pending JPH02214344A (en) | 1989-02-15 | 1989-02-15 | Digital signal modulator/demodulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02214344A (en) |
-
1989
- 1989-02-15 JP JP1036501A patent/JPH02214344A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11239085A (en) | Guided communication system and its method | |
| JPS59114647U (en) | A device that transmits and receives signals over AC power grid lines | |
| CN105406899A (en) | Power line carrier communication apparatus used for overocean communication | |
| JPH02214344A (en) | Digital signal modulator/demodulator | |
| CN113659718B (en) | Carrier communication system and method for transmitting high voltage transmission line protection switch signals | |
| JP3146108B2 (en) | Distribution line carrier signal synchronous injection method | |
| JP2513061B2 (en) | Communication method between terminals | |
| JPH04207721A (en) | Power line carrier communication system | |
| JPH07235906A (en) | Optical communication device | |
| JPH0126210B2 (en) | ||
| Tsuzuki et al. | Dual mode transmission PLC system with an EMC considered algorithm | |
| KR200184185Y1 (en) | Line nosie rednceing apparatus of modem receiuer | |
| JPH0310491A (en) | Cctv data communication system | |
| JPS607576Y2 (en) | data modulator/demodulator | |
| KR100287423B1 (en) | Wireless Signal Transceiver in Optical Subscriber Transmitter | |
| JPS58172027A (en) | Sensitivity suppression prevention method | |
| JPS6248840A (en) | Frequency converting circuit | |
| JPS6115432A (en) | Optical signal transmission circuit | |
| JPH03258145A (en) | Signal cable | |
| JP3025143U (en) | Infrared communication device | |
| JPS5961320A (en) | Bidirectional communication system | |
| JPS6025334A (en) | Optical communication device for spatial transmission | |
| WO2007043162A1 (en) | Power line communication system and its relay device | |
| JPS5816651B2 (en) | data access | |
| JPH11261455A (en) | Signal transmission equipment |