Reads the raw input from the oscilloscope.
                
                Parameters
                ----------
                channel : int
                    channel number of read
                
                Returns
                -------
                rawData : bytes
                    raw binary data read from the oscilloscope

def raw(self, channel=1):
                """
                Reads the raw input from the oscilloscope.
                
                Parameters
                ----------
                channel : int
                    channel number of read
                
                Returns
                -------
                rawData : bytes
                    raw binary data read from the oscilloscope
                """
                self.waitOPC()
                self.write('COMM_FORMAT DEF9,WORD,BIN')
                self.write('C%u:WAVEFORM?' % channel)
                return self.read_raw()