{TAIL ~ An operation} of the protection circuit upon occurrence of an unwanted pulse in {HEAD ~ the first packet synchronizing signal} a will be described with reference to FIG 5 
{ TAIL ~ An operation } of the protection circuit upon occurrence of an unwanted pulse in { HEAD ~ the first packet synchronizing signal } a will be described with reference to FIG 5
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH