EP 0559805 A4 19931103 - COMPENSATION CONTROL FOR OFF-PREMISES CATV SYSTEM
Title (en)
COMPENSATION CONTROL FOR OFF-PREMISES CATV SYSTEM
Publication
Application
Priority
- US 61926190 A 19901128
- US 61937090 A 19901128
- US 61963090 A 19901128
Abstract (en)
[origin: WO9210062A1] A compensation control for an off-premises CATV system includes an automatic gain control and an automatic slope control. A first feedback control (302, 306, 310) is used to compare a first portion of a television signal to a first reference level and null the error. A second feedback control (304, 308, 312) is used to compare a second portion of the signal to a second reference level and null the error. In a second embodiment, the second feedback control differences first and second portions of the television signal. The reference level for automatic gain control is equal to the attenuation between the off-premises equipment and the subscriber premises plus the desired level at the subscriber premises. The level of a jamming signal is set to fall within a range of power levels related to the reference level.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H04K 3/42 (2013.01); H04K 3/43 (2013.01); H04K 3/825 (2013.01); H04N 7/102 (2013.01); H04N 7/166 (2013.01); H04K 2203/14 (2013.01)
Citation (search report)
- [A] EP 0323258 A2 19890705 - GEN INSTRUMENT CORP [US]
- [A] US 4792971 A 19881220 - UEMURA HIROKI [JP]
- [A] US 4418424 A 19831129 - KAWAMOTO NORIYUKI [JP], et al
- [A] US 4769838 A 19880906 - HASEGAWA YONOSUKE [JP]
- [A] EP 0265349 A2 19880427 - BROADBAND ENG INC [US]
- See references of WO 9210062A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
WO 9210062 A1 19920611; AU 9131291 A 19920625; CA 2096749 A1 19920529; EP 0559805 A1 19930915; EP 0559805 A4 19931103
DOCDB simple family (application)
US 9108921 W 19911126; AU 9131291 A 19911126; CA 2096749 A 19911126; EP 92902277 A 19911126