JPS6347308B2 - - Google Patents
Info
- Publication number
- JPS6347308B2 JPS6347308B2 JP638782A JP638782A JPS6347308B2 JP S6347308 B2 JPS6347308 B2 JP S6347308B2 JP 638782 A JP638782 A JP 638782A JP 638782 A JP638782 A JP 638782A JP S6347308 B2 JPS6347308 B2 JP S6347308B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- modulated signal
- line
- transmission
- modulator
- 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.)
- Expired
Links
- 230000008054 signal transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
【発明の詳細な説明】 本発明は周波数変調信号の送信方式に関する。[Detailed description of the invention] The present invention relates to a frequency modulated signal transmission method.
複数の周波数変調信号の送信回線を有する装置
において、各々の送信回線に対しては、間欠的に
しか送信データが発生しなくとも、送信データが
無い時点では継続してキヤリア周波数を送信しな
ければならない場合がある。 In a device that has multiple frequency modulated signal transmission lines, even if transmission data is generated only intermittently for each transmission line, the carrier frequency must be continuously transmitted when there is no transmission data. There may be cases where this is not the case.
従来この場合、高価な周波数変調装置を各回線
に対して一個ずつ設けなければならず、特に回線
数が多い場合には、経済的でなかつた。 Conventionally, in this case, one expensive frequency modulation device had to be provided for each line, which was not economical, especially when the number of lines was large.
本発明の目的は、前記の複数の周波数変調信号
送信回線を有する装置において、間欠的に発生す
る送信データに対しては、回線対応に周波数変調
器を設けることなく、周波数変調信号を送信する
ことを可能にする変調信号送信方式を提供するこ
とにある。 An object of the present invention is to transmit a frequency modulated signal for intermittently generated transmission data without providing a frequency modulator for each line in the device having a plurality of frequency modulated signal transmission lines. The purpose of the present invention is to provide a modulated signal transmission method that enables the following.
本発明の変調信号送信方式は、周波数変調信号
の送信回線に対して、送信情報無しの時点ではキ
ヤリア周波数発振器と接続し、送信情報有りの時
点では周波数変調器と接続換えを行い、周波数変
調信号を送信するようにしたことを特徴とする。 The modulated signal transmission method of the present invention connects a frequency modulated signal transmission line to a carrier frequency oscillator when there is no transmission information, changes the connection to a frequency modulator when there is transmission information, and connects the frequency modulated signal to a carrier frequency oscillator when there is no transmission information. It is characterized by transmitting.
次に図面を参照して本発明について説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロツク図で
ある。周波数変調信号の送信回線群１、キヤリア
周波数発振器（OSC）２、周波数変調器
（MODEM）３、キヤリア周波数発振器２と周波
数変調器３との接続切換装置（SW）４、制御装
置（CONT）５から構成され、制御装置５と接
続切換装置４は制御線６で、制御装置５と周波数
変調器３は信号線７で接続されている。また、送
信回線群１の各回線とキヤリア周波数発振器２と
は接続切換装置４により同時に複数回線の接続が
可能であり、周波数変調器２とは送信回線群のう
ち、１回線のみしか接続されないような構成にな
つている。 FIG. 1 is a block diagram showing one embodiment of the present invention. Frequency modulated signal transmission line group 1, carrier frequency oscillator (OSC) 2, frequency modulator (MODEM) 3, connection switching device (SW) 4 between carrier frequency oscillator 2 and frequency modulator 3, control device (CONT) 5 The control device 5 and the connection switching device 4 are connected by a control line 6, and the control device 5 and the frequency modulator 3 are connected by a signal line 7. Furthermore, each line of the transmission line group 1 and the carrier frequency oscillator 2 can be connected to a plurality of lines at the same time by a connection switching device 4, and only one line of the transmission line group can be connected to the frequency modulator 2. It is structured like this.
第２図は、第１図のブロツク図で示される装置
の動作の一例を送信回線群１における出力波形図
で示したものである。 FIG. 2 shows an example of the operation of the apparatus shown in the block diagram of FIG. 1 in the form of an output waveform diagram in the transmission line group 1. In FIG.
第２図の出力波形図を用いて説明を進める。第
２図中で送信データがない場合は、全回線ともキ
ヤリア周波数発振器２と接続切換装置４を経由し
て接続され、キヤリア周波数が出力されている。
送信データが発生した時点（第２図中のａ，ｂ，
ｃ，ｄの時点）で制御装置５は接続切換装置４に
指示を送り、該当する回線と周波数変調器３を接
続する。接続完了後、制御装置４は変調器３に送
信データを送り、該当する回線には周波数変調さ
れた信号が出力される（第２図中、ａ―ｅ間、ｂ
―ｆ間、ｃ―ｇ間、ｄ―ｈ間）。送信データが消
滅した時点（第２図中のｅ，ｆ，ｇ，ｈの時点）
で、制御装置５は再び接続切換装置４に指示を送
り、該当する回線と周波数変調器３を切り離し、
再びキヤリア周波数発振器と接続する。 The explanation will proceed using the output waveform diagram shown in FIG. When there is no transmission data in FIG. 2, all lines are connected via the carrier frequency oscillator 2 and the connection switching device 4, and the carrier frequency is output.
The point in time when the transmission data is generated (a, b, in Figure 2)
At times c and d), the control device 5 sends an instruction to the connection switching device 4 to connect the corresponding line and the frequency modulator 3. After the connection is completed, the control device 4 sends transmission data to the modulator 3, and a frequency-modulated signal is output to the corresponding line (in Fig. 2, between a and e, b
-f, c-g, dh). The time when the transmitted data disappears (times e, f, g, h in Figure 2)
Then, the control device 5 again sends an instruction to the connection switching device 4 to disconnect the corresponding line and frequency modulator 3, and
Connect with carrier frequency oscillator again.
第２図で示されるような間欠に発生する送信デ
ータに対しては複数の送信回線に対して１個のキ
ヤリア周波数発振器と１個の周波数変調器及び接
続切換装置をもつことにより、キヤリア周波数を
消滅させることなく、周波数変調されたデータを
送ることが可能である。 For transmission data that occurs intermittently as shown in Figure 2, the carrier frequency can be adjusted by having one carrier frequency oscillator, one frequency modulator, and connection switching device for multiple transmission lines. It is possible to send frequency modulated data without annihilation.
本発明は以上説明したように、複数の周波数変
調信号の送信回線を有する装置に適用することに
より、間欠的にしか送信データが発生しない場合
は、各回線対応に周波数変調器を設ける必要がな
く、経済的な装置を供給できる効果がある。 As explained above, by applying the present invention to a device having multiple frequency modulated signal transmission lines, it is not necessary to provide a frequency modulator for each line when transmission data is generated only intermittently. This has the effect of supplying economical equipment.
第１図は本発明の一実施例としての装置を示す
ブロツク図、第２図は第１図で示した装置の送信
回線群１における動作の一例を示す出力波形図で
ある。
１……周波数変調信号の送信回線群、２……キ
ヤリア周波数発振器、３……周波数変調器、４…
…キヤリア周波数発振器２と周波数変調器３との
接続切換装置、５……制御装置、６……制御装置
５と接続切換装置４との間の制御線、７……制御
装置５と周波数変調器３との間の信号線。
FIG. 1 is a block diagram showing an apparatus as an embodiment of the present invention, and FIG. 2 is an output waveform diagram showing an example of the operation of the transmission line group 1 of the apparatus shown in FIG. 1... Frequency modulated signal transmission line group, 2... Carrier frequency oscillator, 3... Frequency modulator, 4...
... Connection switching device between carrier frequency oscillator 2 and frequency modulator 3, 5... Control device, 6... Control line between control device 5 and connection switching device 4, 7... Control device 5 and frequency modulator Signal line between 3 and 3.
Claims (1)
ータ無しの時点ではキヤリア周波数発振器と接続
し、送信データ有りの時点では、周波数変調器と
接続換えを行い、周波数変調信号を送信すること
を特徴とする変調信号送信方式。1. A frequency modulated signal transmission line is connected to a carrier frequency oscillator when there is no data to be transmitted, and when there is data to be transmitted, the connection is changed to a frequency modulator and the frequency modulated signal is transmitted. Modulated signal transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP638782A JPS58123263A (en) | 1982-01-19 | 1982-01-19 | Transmission system for modulated signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP638782A JPS58123263A (en) | 1982-01-19 | 1982-01-19 | Transmission system for modulated signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123263A JPS58123263A (en) | 1983-07-22 |
| JPS6347308B2 true JPS6347308B2 (en) | 1988-09-21 |
Family
ID=11636961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP638782A Granted JPS58123263A (en) | 1982-01-19 | 1982-01-19 | Transmission system for modulated signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123263A (en) |
-
1982
- 1982-01-19 JP JP638782A patent/JPS58123263A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58123263A (en) | 1983-07-22 |
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