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Fig.
6
THRESHOLD
MODULE
38
ti
'7
Ov
be— 300ns —>l
5 6
Pin
connections
No
connection
Input,
connected
to
"EXT
TRIG"
BNC
connector
on
the
front
panel
-15V
input
TTL
Out
(to
pin
15
of
clock
module)
Ground
Ground
+5V
input
+15V
input
Level.
This
pin
is
connected
to
the
front
panel
"LEVEL"
potentiometer.
The
voltage
on
this
pin
is
proportional
to
the
trigger
threshold.
The
voltage
ranges
between
-15V
and
+15V,
which
sets
the
threshold
at
+40V
and
-40V,
respectively.
10.
No
connection
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