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公开(公告)号：EP0674452B1
公开(公告)日：2002-07-03
申请号：EP95301971.8
申请日：1995-03-24
发明人： Okubo, Yoichi , Norichika, Michio , Yokote, Takashi , Suzuki, Hiroshi , Akiyama, Tadashi, , Suganuma, Jun
CPC分类号： H04W88/085 , H04B10/25753 , H04B10/25759
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公开(公告)号：EP0674452A3
公开(公告)日：1996-01-03
申请号：EP95301971.8
申请日：1995-03-24
发明人： Okubo, Yoichi , Norichika, Michio , Yokote, Takashi , Suzuki, Hiroshi , Akiyama, Tadashi, , Suganuma, Jun
CPC分类号： H04W88/085 , H04B10/25753 , H04B10/25759
摘要： A repeater for installation as a measure for silent zones, which automatically compensates for a variation in a light loss caused by a difference in length among optical cables interconnecting a master device (3) and a plurality of slave devices (4) which are allocated and installed in an underground shopping center or the like. The master device and the slaves devices each have current detectors (35-1 to 35-n; 44) for detecting current values of O/E transducers which transduce received light to electric signals. Based on the detected current values, gain control signals are applied to variable gain amplifiers (36-1 to 36-n) to change their amplification factors so that the levels of output RF signals for transmission to a radio base station and a portable station have a prescribed value, thereby compensating for the variation in the light loss of the optical cables (5). This repeater greatly facilitates its installation and additional installation of slave devices.
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3.发明公开Repeater for radio paging system and light-wave receiver therefor 失效Relaisstationfürein Funkrufsystem undLichtwellenempfängerdafür。
公开(公告)号：EP0674452A2
公开(公告)日：1995-09-27
申请号：EP95301971.8
申请日：1995-03-24
发明人： Okubo, Yoichi , Norichika, Michio , Yokote, Takashi , Suzuki, Hiroshi , Akiyama, Tadashi, , Suganuma, Jun
CPC分类号： H04W88/085 , H04B10/25753 , H04B10/25759
摘要： A repeater for installation as a measure for silent zones, which automatically compensates for a variation in a light loss caused by a difference in length among optical cables interconnecting a master device (3) and a plurality of slave devices (4) which are allocated and installed in an underground shopping center or the like. The master device and the slaves devices each have current detectors (35-1 to 35-n; 44) for detecting current values of O/E transducers which transduce received light to electric signals. Based on the detected current values, gain control signals are applied to variable gain amplifiers (36-1 to 36-n) to change their amplification factors so that the levels of output RF signals for transmission to a radio base station and a portable station have a prescribed value, thereby compensating for the variation in the light loss of the optical cables (5). This repeater greatly facilitates its installation and additional installation of slave devices.
摘要翻译： 一种作为静音区域测量的中继器，其自动补偿由主设备（3）和多个从设备（4）之间互连的光缆之间的长度差造成的光损耗的变化， 安装在地下购物中心等。 主装置和从装置各自具有电流检测器（35-1至35-n; 44），用于检测将接收的光转换成电信号的O / E换能器的当前值。 基于检测到的电流值，增益控制信号被施加到可变增益放大器（36-1至36-n）以改变其放大因子，使得用于传输到无线电基站和便携式站的输出RF信号的电平具有 规定值，从而补偿光缆（5）的光损失的变化。 该中继器极大地方便了其安装和附加安装从设备。
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