JPS5510247A - Automatic equalization-characteristic control system - Google Patents

Automatic equalization-characteristic control system

Info

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
Application number
JP8292578A
Other languages
Japanese (ja)
Other versions
JPS5838979B2 (en
Inventor
Yoshihiro Hayashi
Yoshio Nomura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP8292578A priority Critical patent/JPS5838979B2/en
Publication of JPS5510247A publication Critical patent/JPS5510247A/en
Publication of JPS5838979B2 publication Critical patent/JPS5838979B2/en
Expired legal-status Critical Current

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
JP8292578A 1978-07-10 1978-07-10 Automatic equalization degree control method Expired JPS5838979B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH045060U (en) * 1990-04-24 1992-01-17

Also Published As

Publication number Publication date
JPS5838979B2 (en) 1983-08-26

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