| 摘要 |
PURPOSE: A method for transmitting an electrical signal of a multichannel in real time is provided to reduce necessary cost for the transmission of a low speed timing signal by relatively simplifying a system configuration. CONSTITUTION: A part of an optical signal having XMHz frequencies inputted through an LC connector is transmitted directly to a multiplexer. The rest of the optical signal reduces the frequency to XMHz/2 through a divider. A plurality of timing signals is modulated through the multiplexer. The optical signal having the XMHz frequencies and the timing signal modulated by the multiplexer are inputted to an exclusive NOR gate after a 2-bits left shift register. The frequency of the optical signal is modulated into XMHz/2 when the inputted timing signal is Low(0). The frequency of the optical signal is modulated into the XMHz frequencies when the timing signal is High(1). [Reference numerals] (1) Timing #1 source electric signal; (2) Timing #1 modulation electric signal; (3) Timing #1 filter electric signal; (4) Timing #1 demodulation electric signal; (5) Timing #2 source electric signal; (6) Timing #2 modulation electric signal; (7) Timing #3 filter electric signal; (8) Timing #4 modulation electric signal; (AA) Device A; (BB) Long distance installation; (CC) Device B
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