def strip_dbm_tx_power(self, idx):
idx = Radiotap.align(idx, <NUM_LIT:1>)<EOL>dbm_tx_power, = struct.unpack_from('<STR_LIT>', self._rtap, idx)<EOL>return idx + <NUM_LIT:1>, dbm_tx_power<EOL>
strip(1 byte) dbm_tx_power
        :return: int
            idx
        :return: int