JPS6485432A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS6485432A
JPS6485432A JP24070487A JP24070487A JPS6485432A JP S6485432 A JPS6485432 A JP S6485432A JP 24070487 A JP24070487 A JP 24070487A JP 24070487 A JP24070487 A JP 24070487A JP S6485432 A JPS6485432 A JP S6485432A
Authority
JP
Japan
Prior art keywords
equalizer
links
automatic
mean error
square mean
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
Application number
JP24070487A
Other languages
Japanese (ja)
Inventor
Kazuo Narukama
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP24070487A priority Critical patent/JPS6485432A/en
Publication of JPS6485432A publication Critical patent/JPS6485432A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To realize an economical and excellent transmission characteristic by increasing the number of links of a stationary equalizer, and switching the number of links depending on long range and short range communication so as to retard and equalize the long range and short range communication. CONSTITUTION:An automatic equalizer corresponding to + or -3 link is used without any modification to select the number of links of a stationary equalizer 2. Then the number of links is switched selectively when the square mean error of a deciding device 4 of the automatic equalizer 3 is not converged. The automatic equalizer 3 is operated to minimize the square mean error of the device 4 by the adjustment of tap gain and since the tap gain is normally nearly + or -3 links as its limit, in case of the long range communication, even if the tap gain is adjusted to a maximum value, the square mean error is not converged. The tap gain limit and the square mean error are supplied to a control means to increase the number of links of the equalizer 2 to apply automatic equalization again, thereby applying optimized equalization. Thus, the delay equalizer effective to both the long range and short range communication is realized with economical and easy apply excellent transmission control by the automatic equalizer.
JP24070487A 1987-09-28 1987-09-28 Automatic equalizer Pending JPS6485432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24070487A JPS6485432A (en) 1987-09-28 1987-09-28 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24070487A JPS6485432A (en) 1987-09-28 1987-09-28 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS6485432A true JPS6485432A (en) 1989-03-30

Family

ID=17063463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24070487A Pending JPS6485432A (en) 1987-09-28 1987-09-28 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS6485432A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6371080B1 (en) 1999-05-10 2002-04-16 Hitachi, Ltd. Throttle device for internal-combustion engine
US6488010B2 (en) 2000-01-18 2002-12-03 Hitachi, Ltd. Throttle device for internal-combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6371080B1 (en) 1999-05-10 2002-04-16 Hitachi, Ltd. Throttle device for internal-combustion engine
US6390062B1 (en) 1999-05-10 2002-05-21 Hitachi, Ltd. Throttle device of internal combustion engine
US6945228B2 (en) 1999-05-10 2005-09-20 Hitachi, Ltd. Throttle device for internal-combustion engine
US6488010B2 (en) 2000-01-18 2002-12-03 Hitachi, Ltd. Throttle device for internal-combustion engine
US6591809B2 (en) 2000-01-18 2003-07-15 Hitachi, Ltd. Throttle device for internal-combustion engine

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