JPS5447506A - Demodulator for plural carrier waves - Google Patents
Demodulator for plural carrier wavesInfo
- Publication number
- JPS5447506A JPS5447506A JP11401177A JP11401177A JPS5447506A JP S5447506 A JPS5447506 A JP S5447506A JP 11401177 A JP11401177 A JP 11401177A JP 11401177 A JP11401177 A JP 11401177A JP S5447506 A JPS5447506 A JP S5447506A
- Authority
- JP
- Japan
- Prior art keywords
- demodulation
- constitution
- output
- signal
- local oscillation
- 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
Landscapes
- Superheterodyne Receivers (AREA)
Abstract
PURPOSE: To regenerate the demodulation signal of each channel and to simplify the constitution for the SCPC/FM system, by switching the local oscillation frequencies in sequency to perform sampling corresponding to each carrier wave.
CONSTITUTION: The output signal of reference signal oscillator 51 is converted to the code switch pulse of 96k Hz at control pulse generator 50 and then applied to code transmitter 49. Then 12 sets of frequency setting codes are supplied in sequence to frequency synthesizer 36, and the output demodulates (3) the modulated waves sequentially for the 12 channels of terminal 1. And each demodulation output is sampled and reserved in circuits 52∼63 from circuit 50 via pulse (c), and then each sampling value is regenerated to the demodulation signal through LPF64∼75 to be delivered via amplifiers 76∼87. As a result, the demodulation becomes possible with one unit of the demodulator containing the frequency converter and the synthesizer for local oscillation each, thus simplifying the constitution
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11401177A JPS5447506A (en) | 1977-09-22 | 1977-09-22 | Demodulator for plural carrier waves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11401177A JPS5447506A (en) | 1977-09-22 | 1977-09-22 | Demodulator for plural carrier waves |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447506A true JPS5447506A (en) | 1979-04-14 |
Family
ID=14626806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11401177A Pending JPS5447506A (en) | 1977-09-22 | 1977-09-22 | Demodulator for plural carrier waves |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5447506A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5532760A (en) * | 1993-09-29 | 1996-07-02 | Uniden Corporation | Receiver capable of selectively receiving satellite broadcast TV signals and audio SCPC signals |
-
1977
- 1977-09-22 JP JP11401177A patent/JPS5447506A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5532760A (en) * | 1993-09-29 | 1996-07-02 | Uniden Corporation | Receiver capable of selectively receiving satellite broadcast TV signals and audio SCPC signals |
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