JPS57162537A - Heterodyne television relay broadcasting residual side band amplitude modulating type device - Google Patents

Heterodyne television relay broadcasting residual side band amplitude modulating type device

Info

Publication number
JPS57162537A
JPS57162537A JP56046362A JP4636281A JPS57162537A JP S57162537 A JPS57162537 A JP S57162537A JP 56046362 A JP56046362 A JP 56046362A JP 4636281 A JP4636281 A JP 4636281A JP S57162537 A JPS57162537 A JP S57162537A
Authority
JP
Japan
Prior art keywords
voice
video signal
relay broadcasting
amplifying
type device
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
JP56046362A
Other languages
Japanese (ja)
Inventor
Masao Ogino
Toshio Kawaguchi
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 JP56046362A priority Critical patent/JPS57162537A/en
Publication of JPS57162537A publication Critical patent/JPS57162537A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Landscapes

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

Abstract

PURPOSE:To increase the reliability of a TV relay broadcasting device of image/voice separation amplifying system, by amplifying both the image and voice at one time when a fault arises. CONSTITUTION:In the normal mode a switch SW is set at a position shown by a solid line in the diagram. The video signal PIC and the voice signal VOI which are separated from each other through filters FIL1 and FIL2 are amplified by exclusive amplifiers AMP1 and AMP2 and led to the subsequent processing circuit via a mixers MIX2 and MIX3, respectively. On the other hand, if some fault arises at an electric power amplifying stage PA3, the switch SW is changed to the position shown by the dotted line. Then the voice signal amplified by the amplifier AMP2 is mixed again with the video signal via a hybrid circuit H1. Thus the voice signal receives the amplification of electric power through power amplifiers PA1 and PA2 of the video signal system. As a result, the function of the system is maintained regardless of the fault if the amplifier PA3.
JP56046362A 1981-03-31 1981-03-31 Heterodyne television relay broadcasting residual side band amplitude modulating type device Pending JPS57162537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56046362A JPS57162537A (en) 1981-03-31 1981-03-31 Heterodyne television relay broadcasting residual side band amplitude modulating type device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56046362A JPS57162537A (en) 1981-03-31 1981-03-31 Heterodyne television relay broadcasting residual side band amplitude modulating type device

Publications (1)

Publication Number Publication Date
JPS57162537A true JPS57162537A (en) 1982-10-06

Family

ID=12745035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56046362A Pending JPS57162537A (en) 1981-03-31 1981-03-31 Heterodyne television relay broadcasting residual side band amplitude modulating type device

Country Status (1)

Country Link
JP (1) JPS57162537A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0188568U (en) * 1987-12-02 1989-06-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0188568U (en) * 1987-12-02 1989-06-12

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