{HEAD ~ The processing unit} obtains at least one first waveform from the storage unit, and writes {TAIL ~ the first waveform} to the ballast via the first interface 
writes
{ HEAD ~ The processing unit } obtains at least one first waveform from the storage unit , and writes { TAIL ~ the first waveform } to the ballast via the first interface
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH