JPS56166648A - Transmission switching system for television signal - Google Patents

Transmission switching system for television signal

Info

Publication number
JPS56166648A
JPS56166648A JP7064080A JP7064080A JPS56166648A JP S56166648 A JPS56166648 A JP S56166648A JP 7064080 A JP7064080 A JP 7064080A JP 7064080 A JP7064080 A JP 7064080A JP S56166648 A JPS56166648 A JP S56166648A
Authority
JP
Japan
Prior art keywords
signal
station
pilot signal
detector
circuit
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
JP7064080A
Other languages
Japanese (ja)
Inventor
Mutsuo Morimoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7064080A priority Critical patent/JPS56166648A/en
Publication of JPS56166648A publication Critical patent/JPS56166648A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Details Of Television Systems (AREA)

Abstract

PURPOSE:To increase a switching speed by installing a controller in only a transmitting station and receiving station when interposing a repeater station between both the stations. CONSTITUTION:A signal from a repeater station 3 passes through the same path as the receiving terminal of the repeater station 3 at a receiving station 2 and is led out of a system from a telephone signal output terminal 19. A base-band pilot signal, on the other hand, is branched to a path to the output terminal 19 and detected by a base-band pilot signal detector 20, and consequently a signal showing that the system is normal is transmitted to a switching signal detector 22 in a transmitting station 1 via a control line 6. This detector 22 makes sure that the system from the receiving station 2 is normal, and then turns on a TV signal insertion switch 26 to send an inserted TV signal and a TV circuit pilot signal, generated by a TV circuit pilot signal generator 25, from a TV signal input terminal 24 to the transmitter 10 of a circuit 5. Thus, a switching speed is increased easily.
JP7064080A 1980-05-26 1980-05-26 Transmission switching system for television signal Pending JPS56166648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7064080A JPS56166648A (en) 1980-05-26 1980-05-26 Transmission switching system for television signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7064080A JPS56166648A (en) 1980-05-26 1980-05-26 Transmission switching system for television signal

Publications (1)

Publication Number Publication Date
JPS56166648A true JPS56166648A (en) 1981-12-21

Family

ID=13437441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7064080A Pending JPS56166648A (en) 1980-05-26 1980-05-26 Transmission switching system for television signal

Country Status (1)

Country Link
JP (1) JPS56166648A (en)

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