The source unit has {HEAD ~ a check data unit} generating {TAIL ~ at least one check datum} for control data for the medical device , and a transmitting unit transmitting the control data and the check datum to the collection unit  
generating
The source unit has { HEAD ~ a check data unit } generating { TAIL ~ at least one check datum } for control data for the medical device , and a transmitting unit transmitting the control data and the check datum to the collection unit
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH