JPS5624833A - Satellite down-link acquisition unit - Google Patents
Satellite down-link acquisition unitInfo
- 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
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 or are interrupted
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.
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)
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 |
-
1979
- 1979-08-08 JP JP10143379A patent/JPS5624833A/en active Pending
Cited By (3)
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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