{HEAD ~ means} for sampling the n outputs at a specified time relative to the sample clock pulse to produce {TAIL ~ the n samples} 
{ HEAD ~ means } for sampling the n outputs at a specified time relative to the sample clock pulse to produce { TAIL ~ the n samples }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL