JPS5640350A - Mf signal transmitting and receiving system - Google Patents

Mf signal transmitting and receiving system

Info

Publication number
JPS5640350A
JPS5640350A JP11595079A JP11595079A JPS5640350A JP S5640350 A JPS5640350 A JP S5640350A JP 11595079 A JP11595079 A JP 11595079A JP 11595079 A JP11595079 A JP 11595079A JP S5640350 A JPS5640350 A JP S5640350A
Authority
JP
Japan
Prior art keywords
frequency
receiving
variable
dividing
balanced modulator
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
JP11595079A
Other languages
Japanese (ja)
Inventor
Mitsuru Takamura
Shozo Nishimura
Yasumasa Fukuhara
Kazuyoshi Watanabe
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.)
Anritsu Corp
Japan Radio Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Anritsu Corp
Japan Radio Co Ltd
Nippon Telegraph and Telephone 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 Anritsu Corp, Japan Radio Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Anritsu Corp
Priority to JP11595079A priority Critical patent/JPS5640350A/en
Publication of JPS5640350A publication Critical patent/JPS5640350A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Landscapes

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

Abstract

PURPOSE:To simplify a transmitting and receiving circuit, by providing a variable frequency oscillator for transmission and reception and by transmitting and receiving the difference between a fixed frequency or an input frequency and the variable frequency. CONSTITUTION:In case of transmission, a fixed frequency is applied from input terminal 1' to balanced modulator 3, and variable frequency-dividing oscillator 2 oscillates a frequency, which is obtained by adding the natural frequency and the transmission signal frequency, and applies this frequency to balanced modulator 3. Next, the output of balanced modulator 3 is caused to pass through low-pass filter 6 which stops passage of frequencies higher than the fixed frequency, and a frequency of the difference between the variable frequency-dividing oscillation frequency and the fixed frequency is obtained as the transmission signal output. In case of receiving, a frequency obtained by adding the receiving frequency and the center frequency of band-pass filter 4 is applied from variable frequency-dividing oscillator 2 to balanced modulator 3. When the receiving frequency is input from input terminal 1, the difference between the variable frequency-dividing oscillation frequency and the receiving frequency drops as the center frequency of band-pass filter 4 and appears at receiving output terminal 5.
JP11595079A 1979-09-10 1979-09-10 Mf signal transmitting and receiving system Pending JPS5640350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11595079A JPS5640350A (en) 1979-09-10 1979-09-10 Mf signal transmitting and receiving system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11595079A JPS5640350A (en) 1979-09-10 1979-09-10 Mf signal transmitting and receiving system

Publications (1)

Publication Number Publication Date
JPS5640350A true JPS5640350A (en) 1981-04-16

Family

ID=14675159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11595079A Pending JPS5640350A (en) 1979-09-10 1979-09-10 Mf signal transmitting and receiving system

Country Status (1)

Country Link
JP (1) JPS5640350A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258472U (en) * 1985-09-30 1987-04-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258472U (en) * 1985-09-30 1987-04-11

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