JPS6397944U - - Google Patents
Info
- Publication number
- JPS6397944U JPS6397944U JP19119086U JP19119086U JPS6397944U JP S6397944 U JPS6397944 U JP S6397944U JP 19119086 U JP19119086 U JP 19119086U JP 19119086 U JP19119086 U JP 19119086U JP S6397944 U JPS6397944 U JP S6397944U
- Authority
- JP
- Japan
- Prior art keywords
- fsk
- data
- transmitted
- fsk data
- received
- 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
- 230000005540 biological transmission Effects 0.000 claims 2
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Bidirectional Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第１図は本考案の一実施例を示すモデムのブロ
ツク図、第２図は第１図に示すモデムに設けられ
ているフイルタの動作を説明するための特性図で
ある。
符号の説明、１……ＦＳＫ変調器、２……電圧
増幅器、３……レベル調整器、４……マツチング
トランス、５，６……電圧増幅器、７……ＦＳＫ
復調器、８……ハイパスフイルタ、９……ローパ
スフイルタ、１０……データレコーダ。
FIG. 1 is a block diagram of a modem showing an embodiment of the present invention, and FIG. 2 is a characteristic diagram for explaining the operation of a filter provided in the modem shown in FIG. Explanation of symbols, 1...FSK modulator, 2...Voltage amplifier, 3...Level adjuster, 4...Matching transformer, 5, 6...Voltage amplifier, 7...FSK
demodulator, 8... high pass filter, 9... low pass filter, 10... data recorder.
Claims (1)
ンピユータと端末装置との間でデータの全二重通
信を行うにあたり、送信すべきデジタルデータを
ＦＳＫ変調することにより特定周波数帯域を有す
る送信ＦＳＫデータに変換して電話回線に供給す
るとともに前記送信ＦＳＫデータとは異なる周波
数帯域を有する受信ＦＳＫデータをＦＳＫ復調す
ることにより元のデジタルデータに変換して受信
側のコンピユータあるいは端末装置に供給する変
調・復調装置において、ＦＳＫ復調器を含む受信
ＦＳＫデータ伝送系路に混在する送信ＦＳＫデー
タおよび受信ＦＳＫデータのうちいずれか一方の
ＦＳＫデータを分離抽出するフイルタと、該フイ
ルタより得られるＦＳＫデータを出力する出力端
子とを少なくとも具備してなる変調・復調装置。 When performing full-duplex data communication between computers or between a computer and a terminal device via a telephone line, the digital data to be transmitted is FSK-modulated, converted to transmission FSK data having a specific frequency band, and then transmitted over the phone. In a modulation/demodulation device that performs FSK demodulation on received FSK data that is supplied to a line and has a frequency band different from that of the transmitted FSK data, it is converted into original digital data and supplied to a computer or terminal device on the receiving side. At least a filter that separates and extracts either one of the transmitted FSK data and the received FSK data that are mixed in the received FSK data transmission path including the demodulator, and an output terminal that outputs the FSK data obtained from the filter. A modulation/demodulation device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19119086U JPS6397944U (en) | 1986-12-12 | 1986-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19119086U JPS6397944U (en) | 1986-12-12 | 1986-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6397944U true JPS6397944U (en) | 1988-06-24 |
Family
ID=31145101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19119086U Pending JPS6397944U (en) | 1986-12-12 | 1986-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6397944U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60197036A (en) * | 1983-09-10 | 1985-10-05 | エステイ−シ− ピ−エルシ− | Data transmission system |
-
1986
- 1986-12-12 JP JP19119086U patent/JPS6397944U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60197036A (en) * | 1983-09-10 | 1985-10-05 | エステイ−シ− ピ−エルシ− | Data transmission system |
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