| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication equipment which improves the transmission quality of a transmission/reception signal of an optical beacon and can be miniaturized. SOLUTION: Relating to this equipment, demultiplexing circuits 20 and 40 are provided at a transmission/reception part for transmission/reception of a radio beacon and an optical beacon and a main body part for processing of the transmission/reception signal respectively and demultiplex various signals on a high frequency cable L to perform multiplex transmission. Optical beacon demultiplexing circuits 20 and 40 demuiltiplexing square wave optical beacon transmission/reception signals LBs and LBr consist of hybrid circuits provided with buffer circuits 24 and 44, terminating resistances 25 and 45, differential compactors 26 and 46, since hydroid circuits have a simple constitution and have no cut-off areas like a filter, the waveform is prevented from being distorted by filtering the harmonic component of a signal on the low frequency side together with a signal on the high frequency side at the time of extracting the signal on the low frequency side even if frequencies of optical beacon transmission/reception signals are close. |
