Labels:barrier reef | book | bulletin board | cabinet | crt screen | earth | grass | oscilloscope | poster | rock | sky | windowpane OCR: System No. 4 100 200 300 400 500 ms Signal Sending duration 150 ms Signal imit ation tnot recoonized} Transmission PREFIX Reception SIGNAL {limit valuesi [10] Safety margin {duration] 100 ms Recognition time of signal Signal |xx ou YY Sending duration oU 100 m s 350 20 FTS Transmission 1120 Reception Himit values] SUFFIX SIGNALS (15) [25 [25] Safety margin tdurat tion} DE 50 160 m1 200 m Recognition time signal XX YY 100 200 300 400 500 S 46920 FIGURE t/Q.J21 Duration of Line Signal Elements dura
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