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Modem is the important equipment in two way satellite time and frequency transfer (TWSTFT, short for TW). It takes the role of modulating and demodulating the one pulse per second (1PPS). With the using of the multi-channel technology in TWSTFT, multi-channel modem is carried on. The multi-channel modem concerned in this paper is NICT modem while the single channel modem is the TWT-100. In this paper,...
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