JPS5490922A - Delivery system for announcement signal - Google Patents
Delivery system for announcement signalInfo
- Publication number
- JPS5490922A JPS5490922A JP15742677A JP15742677A JPS5490922A JP S5490922 A JPS5490922 A JP S5490922A JP 15742677 A JP15742677 A JP 15742677A JP 15742677 A JP15742677 A JP 15742677A JP S5490922 A JPS5490922 A JP S5490922A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- subcarrier
- line monitor
- main delivery
- band
- 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
- Monitoring And Testing Of Transmission In General (AREA)
- Radio Relay Systems (AREA)
Abstract
PURPOSE: To enable to reduce the cross modulation distortion, by using the signal of frequency near the frequency band of the main delivery signal as subcarrier.
CONSTITUTION: Based on the signal of the line monitor pilot signal generator 1, the circuit 5 synthesized to the frequency band near the band upper or lower the band of the main delivery signal, is provided. The subcarrier formed is modulated 3 with the announcement signal and synthesized 5 with the main delivery signal, and it is transmitted with FM modulation 7. On the other hand, at the reception side, the reception signal is FM-demodulated 12, separated 13 into the signal corresponding to the modulation system, and the line monitor pilot signal obtained is performed for synchronizing reproduction. Based on the line monitor pilot signal, the subcarrier signal is reproduced 18, and the announcement signal is obtained with the synchronizing detection 19. Thus, cross modulation distortion can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15742677A JPS5490922A (en) | 1977-12-28 | 1977-12-28 | Delivery system for announcement signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15742677A JPS5490922A (en) | 1977-12-28 | 1977-12-28 | Delivery system for announcement signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5490922A true JPS5490922A (en) | 1979-07-19 |
Family
ID=15649366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15742677A Pending JPS5490922A (en) | 1977-12-28 | 1977-12-28 | Delivery system for announcement signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5490922A (en) |
-
1977
- 1977-12-28 JP JP15742677A patent/JPS5490922A/en active Pending
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