code: def read_info_string(self):
          
          infostring = []
  
          # Send the command byte and sleep for 9 ms
          self.cnxn.xfer([0x3F])
          sleep(9e-3)
  
          # Read the info string by sending 60 empty bytes
          for i in range(60):
              resp = self.cnxn.xfer([0x00])[0]
              infostring.append(chr(resp))
  
          sleep(0.1)
  
          return ''.join(infostring)
docs: Reads the information string for the OPC
  
          :rtype: string
  
          :Example:
  
          >>> alpha.read_info_string()
          'OPC-N2 FirmwareVer=OPC-018.2....................BD'