JPS5510247A - Automatic equalization-characteristic control system - Google Patents
Automatic equalization-characteristic control systemInfo
- Publication number
- JPS5510247A JPS5510247A JP8292578A JP8292578A JPS5510247A JP S5510247 A JPS5510247 A JP S5510247A JP 8292578 A JP8292578 A JP 8292578A JP 8292578 A JP8292578 A JP 8292578A JP S5510247 A JPS5510247 A JP S5510247A
- Authority
- JP
- Japan
- Prior art keywords
- variation
- equalization
- comparator
- oscillator
- transmission line
- 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.)
- Granted
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE: To improve equalization precision by performing accurate compensation of each unit ocean interval by controlling the gain of an amplification part by deriving a supervision-only signal from an amplifier output and then by detecting its level variation by the control part.
CONSTITUTION: The detection signal of higher-group equalization-characteristic supervisory oscillator 2 provided to oceaninterval equalizer 1 is supplied to the higher-group transmission line by level regulator 3, selective filter 4 and hydrid coil 5 and sent out as a main signal to coast radio station 8 by way of variable equalizer 6 and coaxial transmission line 7. Further, the detection signal under the influence of the variation in equalization characteristic is separated by selective filter 12 provided to detection part 11 and rectified by rectifier 14 before being inputted to comparator 15. By comparing the normal level of oscillator 2 with the input voltage of set standart voltage 16, this comparator 15 outputs a direct-current voltage corresponding to the variation from the initial value of the frequency and the output is amplified by amplifier 17 and then sent to arithmetic processing part 18, where it is processed to control control part 44, thereby carrying out corrections of each unit ocean interval.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8292578A JPS5838979B2 (en) | 1978-07-10 | 1978-07-10 | Automatic equalization degree control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8292578A JPS5838979B2 (en) | 1978-07-10 | 1978-07-10 | Automatic equalization degree control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5510247A true JPS5510247A (en) | 1980-01-24 |
JPS5838979B2 JPS5838979B2 (en) | 1983-08-26 |
Family
ID=13787804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8292578A Expired JPS5838979B2 (en) | 1978-07-10 | 1978-07-10 | Automatic equalization degree control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5838979B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH045060U (en) * | 1990-04-24 | 1992-01-17 |
-
1978
- 1978-07-10 JP JP8292578A patent/JPS5838979B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5838979B2 (en) | 1983-08-26 |
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