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