JPS56115961A - Phase characteristic measuring system - Google Patents

Phase characteristic measuring system

Info

Publication number
JPS56115961A
JPS56115961A JP1874080A JP1874080A JPS56115961A JP S56115961 A JPS56115961 A JP S56115961A JP 1874080 A JP1874080 A JP 1874080A JP 1874080 A JP1874080 A JP 1874080A JP S56115961 A JPS56115961 A JP S56115961A
Authority
JP
Japan
Prior art keywords
phase
frequency
signals
characteristic
signal
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
JP1874080A
Other languages
Japanese (ja)
Inventor
Akira Hamada
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 JP1874080A priority Critical patent/JPS56115961A/en
Publication of JPS56115961A publication Critical patent/JPS56115961A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To make it possible to make the compensation of a characteristic at the time of generated phasing by measuring the phasial characteristic by using plurality of pilot signals while transmitting signals in the broad zone transmission system. CONSTITUTION:From the transmitter 4 the transmission signal is sent out being added with two pilot signals f1 and f2 (f2/f1=n) through a signal synthesizer 3. The output f2 of the voltage control oscillator 2 is made of the frequency f1 by means of a phase shifter 5 and by a n frequency divider 6 to detect the phase difference from the output f1 of the oscillator 1 through a phase detector 7. The detected phase difference is fed back to the voltage control oscillator 2 to lock the phase f2. The braod zone signals received by the receiver 8 are separated into the transmission signals f1 and f2 through a wave divider 9, then f2 is made of the frequency f1 through the phase shifter 10 and the n frequency divider 11. By detecting the phasial relation of the frequency divided f1 to the signal f1 directly transmitted by the phase detector 12 the phase characteristic of the circuit can be measured during transmitting time.
JP1874080A 1980-02-18 1980-02-18 Phase characteristic measuring system Pending JPS56115961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1874080A JPS56115961A (en) 1980-02-18 1980-02-18 Phase characteristic measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1874080A JPS56115961A (en) 1980-02-18 1980-02-18 Phase characteristic measuring system

Publications (1)

Publication Number Publication Date
JPS56115961A true JPS56115961A (en) 1981-09-11

Family

ID=11980056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1874080A Pending JPS56115961A (en) 1980-02-18 1980-02-18 Phase characteristic measuring system

Country Status (1)

Country Link
JP (1) JPS56115961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122642A (en) * 2004-09-30 2006-05-18 Tokyo Univ Of Science Exercise stress providing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122642A (en) * 2004-09-30 2006-05-18 Tokyo Univ Of Science Exercise stress providing device

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