If the first receiving unit does have an unused tuner, the first receiving device records {HEAD ~ the particular content} at {TAIL ~ the particular time} 
at
If the first receiving unit does have an unused tuner , the first receiving device records { HEAD ~ the particular content } at { TAIL ~ the particular time }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL