JPS55114094A - Intercept command transmission system - Google Patents

Intercept command transmission system

Info

Publication number
JPS55114094A
JPS55114094A JP2125479A JP2125479A JPS55114094A JP S55114094 A JPS55114094 A JP S55114094A JP 2125479 A JP2125479 A JP 2125479A JP 2125479 A JP2125479 A JP 2125479A JP S55114094 A JPS55114094 A JP S55114094A
Authority
JP
Japan
Prior art keywords
signal
station
control
intercept command
control signal
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
JP2125479A
Other languages
Japanese (ja)
Inventor
Kazuhiro Nakano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2125479A priority Critical patent/JPS55114094A/en
Publication of JPS55114094A publication Critical patent/JPS55114094A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/08—Calling by using continuous ac
    • H04Q9/10—Calling by using continuous ac using single different frequencies

Abstract

PURPOSE:To secure the certainty of called-state decision operation by holding a reception level constant by sending an intercept command signal by using the free time of control signal transmission without overlapping with a control signal. CONSTITUTION:Control signals f1-fn corresponding to subordinate stations 2-1- 2-n are generated by control signal oscillator OSC1 of master station 1 and are sent to subordinate stations 2-1-2-n via hybrid HYB1. Then, called-state decision parts BPF1-BPFn of subordinate stations 2-1-2-n allow selectively control signals to pass through. On detecting a control signal for its own station, fixed operation, e.g., control measurement is taken to send a return signal out. Further, intercept command oscillator OSC2 is oscillated in the free time of control signal transmission by controlling intercept command transmitting contact 4 by control-signal oscillator OSC1 to send an intercept command signal to intercepting station 3. This intercept command signal allows the intercepting station to receive the return signal to the subordinate station at that time.
JP2125479A 1979-02-24 1979-02-24 Intercept command transmission system Pending JPS55114094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2125479A JPS55114094A (en) 1979-02-24 1979-02-24 Intercept command transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2125479A JPS55114094A (en) 1979-02-24 1979-02-24 Intercept command transmission system

Publications (1)

Publication Number Publication Date
JPS55114094A true JPS55114094A (en) 1980-09-03

Family

ID=12049938

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2125479A Pending JPS55114094A (en) 1979-02-24 1979-02-24 Intercept command transmission system

Country Status (1)

Country Link
JP (1) JPS55114094A (en)

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