The data transceiver 1, wherein the receiver supplies operational power to a Radio Frequency processor for outputting a received signal and a signal strength detector for measuring a strength of {HEAD ~ the received signal} outputted from {TAIL ~ the RF processor} during the transmission period, if the transmission period is not allowed 
outputted from
The data transceiver 1 , wherein the receiver supplies operational power to a Radio Frequency processor for outputting a received signal and a signal strength detector for measuring a strength of { HEAD ~ the received signal } outputted from { TAIL ~ the RF processor } during the transmission period , if the transmission period is not allowed
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