Title:
ディジタルテレビジョン放送信号受信装置
Document Type and Number:
Japanese Patent JP4151619
Kind Code:
B2
Abstract:
A multi-directional antenna connected with a digital television broadcast signal receiver is arranged not to move one full turn instantaneously in response to an abrupt drop down in the intensity of a received signal thus to avoid any downward overshooting of the intensity of the received signal and eliminate any useless direction searching time while remains favorably controlled to face in the direction where the intensity of the received signal is at optimum. More specifically, the maximum of the intensity of a received signal at each channel is measured and the threshold is set to a level lower than the maximum. When the intensity of a received signal has dropped down from the threshold, the antenna remains not turned within a predetermined period of marginal time. The antenna is moved one full turn only when the intensity drops down from the threshold and stays continuously over the predetermined period of marginal time. Then, the maximum of the intensity of the received signal is modified and stored for future use.
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Inventors:
Toshihiro Takashiro
Yoshitomi Nagamura
Yasuhiro Inui
Yoshitomi Nagamura
Yasuhiro Inui
Application Number:
JP2004189974A
Publication Date:
September 17, 2008
Filing Date:
June 28, 2004
Export Citation:
Assignee:
Funai Electric Co., Ltd.
International Classes:
H04B1/18; H01Q1/12; H01Q3/02; H04B1/16; H04B7/10; H04N5/44; H04N7/20
Domestic Patent References:
| JP2004015800A | ||||
| JP2004173062A | ||||
| JP9321517A |
Attorney, Agent or Firm:
Yasuo Itaya
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