JPS54111211A - Direct radio relay unit having signal branching means - Google Patents

Direct radio relay unit having signal branching means

Info

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
Application number
JP1827078A
Other languages
Japanese (ja)
Inventor
Katsuhiko Tezuka
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 JP1827078A priority Critical patent/JPS54111211A/en
Publication of JPS54111211A publication Critical patent/JPS54111211A/en
Pending legal-status Critical Current

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
JP1827078A 1978-02-20 1978-02-20 Direct radio relay unit having signal branching means Pending JPS54111211A (en)

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)

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