JPS54111211A - Direct radio relay unit having signal branching means - Google Patents
Direct radio relay unit having signal branching meansInfo
- Publication number
- JPS54111211A JPS54111211A JP1827078A JP1827078A JPS54111211A JP S54111211 A JPS54111211 A JP S54111211A JP 1827078 A JP1827078 A JP 1827078A JP 1827078 A JP1827078 A JP 1827078A JP S54111211 A JPS54111211 A JP S54111211A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- branched
- signal
- squelch
- oscillator
- 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
Abstract
PURPOSE: To adapt a set stand-by constitution of each demodulator to improve the reliability for branched signals by mixing the other branched output signal and the output signal of a squelch oscillator in frequency and making input signals of branch demolulators equal to one another.
CONSTITUTION: Input signals are branched by receiving branching filter 12, and one of f1 of branched outputs has the frequency shifted by fixed frequency fs by frequency converter 17. Then, signal f1' obtained by shifting f1 by frequency fs and one of outputs of squelch oscillator SOSC1 which has the same frequency as signal f1' are selected by switch SW1 and are transmitted from TX1. Here, other output f2 franched by branding filter circuit 12 and output f2' of squelch oscillator SOSC2 are mixed in frequency to obtain a branched signal, which has the same frequency as fixed frequency fs, in squelch switch SW2. As a result, by making frequencies of input signals of branch demodulators 22 and 23 equal to each other, the set stand- by constitution of demodulators 22 and 23 can be adapted, and the reliability for branched signals can be improved.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1827078A JPS54111211A (en) | 1978-02-20 | 1978-02-20 | Direct radio relay unit having signal branching means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1827078A JPS54111211A (en) | 1978-02-20 | 1978-02-20 | Direct radio relay unit having signal branching means |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54111211A true JPS54111211A (en) | 1979-08-31 |
Family
ID=11966956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1827078A Pending JPS54111211A (en) | 1978-02-20 | 1978-02-20 | Direct radio relay unit having signal branching means |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54111211A (en) |
-
1978
- 1978-02-20 JP JP1827078A patent/JPS54111211A/en active Pending
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