JPS6480188A - Catv level automatic variable system - Google Patents

Catv level automatic variable system

Info

Publication number
JPS6480188A
JPS6480188A JP23692887A JP23692887A JPS6480188A JP S6480188 A JPS6480188 A JP S6480188A JP 23692887 A JP23692887 A JP 23692887A JP 23692887 A JP23692887 A JP 23692887A JP S6480188 A JPS6480188 A JP S6480188A
Authority
JP
Japan
Prior art keywords
level
section
signal
data
measuring
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
JP23692887A
Other languages
Japanese (ja)
Other versions
JP2518307B2 (en
Inventor
Yasushi Hamada
Hitoshi Yoshizawa
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62236928A priority Critical patent/JP2518307B2/en
Publication of JPS6480188A publication Critical patent/JPS6480188A/en
Application granted granted Critical
Publication of JP2518307B2 publication Critical patent/JP2518307B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To avoid much man-hour by measuring a level of a measuring frequency by a level measuring section, sending the result to a data sending section, receiving an incoming signal of the measured data by a data signal reception section of a center and adjusting the level of an outgoing band signal generator by a level variable control section so as to adjust the level into a proper level thereby reducing the adjusting time of the output level. CONSTITUTION:A level measurement section 4 sets a measuring frequency by using a control signal from a control signal reception section 3, measures the level and sends the measured data to a data transmission section 5. In receiving the measured data from the measuring section 4, the data transmission section 5 adds its own address, converts the measured data to a signal of an incoming band and sends the result as an incoming signal. The measured data reaching the center 30 is given to a data signal reception section 6 via a directional filter 9. An outgoing band signal generator 8 receives the control signal from the level variable control section 7 and sends the outgoing signal adjusted to the proper level to the outgoing line via the directional filter 9. Thus, the deviation adjustment between channels is automated by using plural measuring frequencies.
JP62236928A 1987-09-21 1987-09-21 CATV level automatic variable system Expired - Lifetime JP2518307B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62236928A JP2518307B2 (en) 1987-09-21 1987-09-21 CATV level automatic variable system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62236928A JP2518307B2 (en) 1987-09-21 1987-09-21 CATV level automatic variable system

Publications (2)

Publication Number Publication Date
JPS6480188A true JPS6480188A (en) 1989-03-27
JP2518307B2 JP2518307B2 (en) 1996-07-24

Family

ID=17007829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62236928A Expired - Lifetime JP2518307B2 (en) 1987-09-21 1987-09-21 CATV level automatic variable system

Country Status (1)

Country Link
JP (1) JP2518307B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361394A (en) * 1989-12-19 1994-11-01 Kabushiki Kaisha Toshiba Upstream signal control apparatus for cable television system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388514A (en) * 1977-01-14 1978-08-04 Nippon Cetu Kk System for automatically preeequalizing transmission tv signal of catv system
JPS5650680A (en) * 1979-09-29 1981-05-07 Pioneer Electronic Corp Line monitor device for two-way data communication system
JPS6053390A (en) * 1983-09-02 1985-03-27 Nec Corp Relay amplifier for catv

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388514A (en) * 1977-01-14 1978-08-04 Nippon Cetu Kk System for automatically preeequalizing transmission tv signal of catv system
JPS5650680A (en) * 1979-09-29 1981-05-07 Pioneer Electronic Corp Line monitor device for two-way data communication system
JPS6053390A (en) * 1983-09-02 1985-03-27 Nec Corp Relay amplifier for catv

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361394A (en) * 1989-12-19 1994-11-01 Kabushiki Kaisha Toshiba Upstream signal control apparatus for cable television system

Also Published As

Publication number Publication date
JP2518307B2 (en) 1996-07-24

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