JPS57133371A - Sweeping method - Google Patents

Sweeping method

Info

Publication number
JPS57133371A
JPS57133371A JP56018481A JP1848181A JPS57133371A JP S57133371 A JPS57133371 A JP S57133371A JP 56018481 A JP56018481 A JP 56018481A JP 1848181 A JP1848181 A JP 1848181A JP S57133371 A JPS57133371 A JP S57133371A
Authority
JP
Japan
Prior art keywords
frequency
signal
mixer
given
amplifier
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
JP56018481A
Other languages
Japanese (ja)
Inventor
Hideo Yamane
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56018481A priority Critical patent/JPS57133371A/en
Publication of JPS57133371A publication Critical patent/JPS57133371A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/585—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value
    • G01S13/586—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value using, or combined with, frequency tracking means

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To enable curtailment of a time required for locking without deterioration of the sensitivity of locking of a frequency tracking loop, by providing a frequency detecting circuit whose central frequency is higher by a prescribed value than that of the tracking loop. CONSTITUTION:In addition to the frequency tracking loop, the frequency detecting circuit consisting of the turee units of a band-pass filter, an amplifier and a frequency discriminator, whose central frequency is higher by a prescribed value than that of the former, is constituted. And, when a signal is impressed on a mixer 1, for instance, a sweep signal delivered from a sweep circuit 6 is given to a voltage controlling oscillator 9 through an addition amplifier 7 and a filter 8, transformed into a signal having a frequency proportional to a voltage and impressed on the mixer 1. When the frequency of the output signal of the mixer 1 lowers and enters initially the pass band of the band-pass filter (b) 10, it is given to the amplifier (b) 11 and the frequency discriminator (b) 12, and when it exceeds a prescribed value, a pluse signal is generated to be given to the sweep circuit and act therein so as to delay the speed of sweeping by a prescribed time.
JP56018481A 1981-02-10 1981-02-10 Sweeping method Pending JPS57133371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56018481A JPS57133371A (en) 1981-02-10 1981-02-10 Sweeping method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56018481A JPS57133371A (en) 1981-02-10 1981-02-10 Sweeping method

Publications (1)

Publication Number Publication Date
JPS57133371A true JPS57133371A (en) 1982-08-18

Family

ID=11972819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56018481A Pending JPS57133371A (en) 1981-02-10 1981-02-10 Sweeping method

Country Status (1)

Country Link
JP (1) JPS57133371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256537A2 (en) 1986-08-15 1988-02-24 Fuji Photo Film Co., Ltd. Color print and a method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256537A2 (en) 1986-08-15 1988-02-24 Fuji Photo Film Co., Ltd. Color print and a method for producing the same

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