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JPS5624833A - Satellite down-link acquisition unit - Google Patents

Satellite down-link acquisition unit

Info

Publication number
JPS5624833A
JPS5624833A JP10143379A JP10143379A JPS5624833A JP S5624833 A JPS5624833 A JP S5624833A JP 10143379 A JP10143379 A JP 10143379A JP 10143379 A JP10143379 A JP 10143379A JP S5624833 A JPS5624833 A JP S5624833A
Authority
JP
Japan
Prior art keywords
frequency
scan
receiver
reception
range
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
JP10143379A
Other languages
Japanese (ja)
Inventor
Hiroyuki Ito
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 JP10143379A priority Critical patent/JPS5624833A/en
Publication of JPS5624833A publication Critical patent/JPS5624833A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail

Landscapes

  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To facilitate acquisition by narrowing the range of a reception frequency scan by previously predicting and setting the frequency of satellite down link in a receiver. CONSTITUTION:Reception frequency converter 2 converts a signal, received by antenna unit 1, into an intermediate frequency and after the Doppler effect is compensated by Doppler-frequency-shift compensator 3, it is input to receiver 4. Reception-frequency scan controller 5 takes a scan within the required frequency range and stops the scan on receiving acquisition information from receiver 4 and memory unit 6 remembers the current reception frequency. From this point, the acquisition narrow in frequency range can be attained by supplying the frequency stored in unit 6 to controller 5 as an initial value.
JP10143379A 1979-08-08 1979-08-08 Satellite down-link acquisition unit Pending JPS5624833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10143379A JPS5624833A (en) 1979-08-08 1979-08-08 Satellite down-link acquisition unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10143379A JPS5624833A (en) 1979-08-08 1979-08-08 Satellite down-link acquisition unit

Publications (1)

Publication Number Publication Date
JPS5624833A true JPS5624833A (en) 1981-03-10

Family

ID=14300554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10143379A Pending JPS5624833A (en) 1979-08-08 1979-08-08 Satellite down-link acquisition unit

Country Status (1)

Country Link
JP (1) JPS5624833A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04286220A (en) * 1991-03-14 1992-10-12 Nec Corp Satellite communication earth station equipment
US7607232B2 (en) 2003-01-10 2009-10-27 Shindaiwa, Inc. Vegetation cutting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04286220A (en) * 1991-03-14 1992-10-12 Nec Corp Satellite communication earth station equipment
US7607232B2 (en) 2003-01-10 2009-10-27 Shindaiwa, Inc. Vegetation cutting device
US7979991B2 (en) 2003-01-10 2011-07-19 Pfaltzgraff James R Vegetation cutting device

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