def strip_db_tx_attenuation(self, idx):
idx = Radiotap.align(idx, <NUM_LIT:2>)<EOL>db_tx_attenuation, = struct.unpack_from('<STR_LIT>', self._rtap, idx)<EOL>return idx + <NUM_LIT:2>, db_tx_attenuation<EOL>
strip(1 byte) db_tx_attenuation
        :return: int
            idx
        :return: int