JPS5744349A - Broadcasting device - Google Patents

Broadcasting device

Info

Publication number
JPS5744349A
JPS5744349A JP12051380A JP12051380A JPS5744349A JP S5744349 A JPS5744349 A JP S5744349A JP 12051380 A JP12051380 A JP 12051380A JP 12051380 A JP12051380 A JP 12051380A JP S5744349 A JPS5744349 A JP S5744349A
Authority
JP
Japan
Prior art keywords
frequency
transmission
oscillator
output
center
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
JP12051380A
Other languages
Japanese (ja)
Inventor
Shunpei Ito
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12051380A priority Critical patent/JPS5744349A/en
Publication of JPS5744349A publication Critical patent/JPS5744349A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To eliminate a shift in transmission frequeny by controlling transmission frequencies of transmission centers on the basis of the transmission frequency of a specific transmission center when a broadcast is delivered from those transmission centers at the same frequency. CONSTITUTION:At a specific transmission center 1, the output of a highly stable oscillator 3 is applied to a transmitter 5, whose output is sent from an antenna 7 while part of the output of the oscillator 3 is frequency-divided into a frequency f1 by a frequency divider 9 to be transmitted to another transmission center 2 via a transmission line 10. At the transmission center 2, the frequency f1 is extracted by a filter 11 and amplified by an amplifier 12, whose output is applied to a phase comparator 15. The phase comparator 15 compares the output of a voltage-controlled oscillator 13 with a signal whose frequency is divided by a frequency divider 14 and the frequency f1 sent from the transmission center 1 to equalize the oscillation frequency of the oscillator 13 to the frequency of the oscillator 3.
JP12051380A 1980-08-29 1980-08-29 Broadcasting device Pending JPS5744349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12051380A JPS5744349A (en) 1980-08-29 1980-08-29 Broadcasting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12051380A JPS5744349A (en) 1980-08-29 1980-08-29 Broadcasting device

Publications (1)

Publication Number Publication Date
JPS5744349A true JPS5744349A (en) 1982-03-12

Family

ID=14788072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12051380A Pending JPS5744349A (en) 1980-08-29 1980-08-29 Broadcasting device

Country Status (1)

Country Link
JP (1) JPS5744349A (en)

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