means responsive to {HEAD ~ the timing signals} for generating {TAIL ~ a second input signal} having a frequency equal to the timing signal frequency divided by a second factor; and 
for generating
means responsive to { HEAD ~ the timing signals } for generating { TAIL ~ a second input signal } having a frequency equal to the timing signal frequency divided by a second factor ; and
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH