EP 0995273 A2 20000426 - AM QUALITY DETECTOR
Title (en)
AM QUALITY DETECTOR
Title (de)
QUALITÄTSDETEKTOR FÜR AM
Title (fr)
DETECTEUR DE QUALITE DE MODULATION D'AMPLITUDE (AM)
Publication
Application
Priority
- EP 99905127 A 19990308
- EP 98200938 A 19980326
- IB 9900382 W 19990308
Abstract (en)
[origin: WO9949581A2] During an automatic scanning of an AM frequency band it is required that the scanning is only stopped when a usable audio signal is received. To achieve this normally the receiver checks the (RF) signal level and the IF frequency of the received signal. Because at night the propagation of AM signals is improved as a consequence of the weather conditions it is possible that a far away station having the same transmitting fequency interferes with a local station. To overcome this a detector and receiver are proposed whereby the detector detects interferences of two or more stations and supplies a detection signal resulting in resuming scanning for a next station.
IPC 1-7
IPC 8 full level
H03J 7/04 (2006.01); H04B 1/10 (2006.01); H04B 1/16 (2006.01); H04B 17/00 (2006.01)
CPC (source: EP KR)
H03J 7/04 (2013.01 - EP); H04B 1/10 (2013.01 - KR); H04B 1/1027 (2013.01 - EP)
Citation (search report)
See references of WO 9949581A2
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9949581 A2 19990930; WO 9949581 A3 20000106; CN 1273714 A 20001115; EP 0995273 A2 20000426; JP 2002500850 A 20020108; KR 20010012983 A 20010226
DOCDB simple family (application)
IB 9900382 W 19990308; CN 99800343 A 19990308; EP 99905127 A 19990308; JP 54797799 A 19990308; KR 19997010955 A 19991125