JPS5744349A - Broadcasting device - Google Patents
Broadcasting deviceInfo
- 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
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.
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) |
-
1980
- 1980-08-29 JP JP12051380A patent/JPS5744349A/en active Pending
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