| http://www.w3.org/ns/prov#value | - The output buffer 13 is followed by a laser drive circuit 15 and a transmission encoder 16. [0037] The encoder 11 may be formed by a digital signal processor, a CPU, or a similar device including a combination of an input/output port, a processing section, a ROM, and a RAM. In this case, the encoder 11 operates in accordance with a control program stored in the ROM or the RAM. The control program
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