<s>
A	O
gating	B-Algorithm
signal	I-Algorithm
is	O
a	O
digital	O
signal	O
or	O
pulse	O
(	O
sometimes	O
called	O
a	O
"	O
trigger	O
"	O
)	O
that	O
provides	O
a	O
time	O
window	O
so	O
that	O
a	O
particular	O
event	O
or	O
signal	O
from	O
among	O
many	O
will	O
be	O
selected	O
and	O
others	O
will	O
be	O
eliminated	O
or	O
discarded	O
.	O
</s>
<s>
Such	O
a	O
signal	O
is	O
called	O
a	O
gating	B-Algorithm
signal	I-Algorithm
.	O
</s>
