JPS5784630A - Radio communication system - Google Patents

Radio communication system

Info

Publication number
JPS5784630A
JPS5784630A JP16173380A JP16173380A JPS5784630A JP S5784630 A JPS5784630 A JP S5784630A JP 16173380 A JP16173380 A JP 16173380A JP 16173380 A JP16173380 A JP 16173380A JP S5784630 A JPS5784630 A JP S5784630A
Authority
JP
Japan
Prior art keywords
circuit
mixer
opposing
given
local oscillation
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
JP16173380A
Other languages
Japanese (ja)
Inventor
Yuji Kato
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 JP16173380A priority Critical patent/JPS5784630A/en
Publication of JPS5784630A publication Critical patent/JPS5784630A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

PURPOSE:To select the channel possible for opposing communication at any time, by driving the mixer of transmission/reception section with the output of a vacant channel display circuit. CONSTITUTION:Only the reception frequency in use among radio frequencies F1-F5 is converted into a base band signal at a mixer 4 and supplied to a display circuit 9. When the vacant channel switch of the circuit 9 is depressed, the said control signal is given to a local oscillation circuit 6 via driving circuits 10, 7, and the local oscillation output is given to the mixers 4 and 16. Next, the opposing station is called from a signal circuit 19 to communicate with the opposing station.
JP16173380A 1980-11-17 1980-11-17 Radio communication system Pending JPS5784630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16173380A JPS5784630A (en) 1980-11-17 1980-11-17 Radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16173380A JPS5784630A (en) 1980-11-17 1980-11-17 Radio communication system

Publications (1)

Publication Number Publication Date
JPS5784630A true JPS5784630A (en) 1982-05-27

Family

ID=15740843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16173380A Pending JPS5784630A (en) 1980-11-17 1980-11-17 Radio communication system

Country Status (1)

Country Link
JP (1) JPS5784630A (en)

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