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60
Complete
the
following procedure:
(1)
Connect
the
test
equipment
as
shown
in
Figure
6.15.
COUNTER
TRIG LEVEL
A OUTPUT
^
1
;
OSCILLOSCOPE
"f
1
1
"""V
PROBE
Fig.
6.15
Connections
for
Trigger Level
PVP
(0
(2)
Select the
DC
coupling
of
the oscilloscope
input
(3)
Set the oscilloscope
to
monitor
a
waveform
of
approximately 12V peak-to-peak
with
a
frequency
of
2
Hz.
(4)
Select the
CHECK
function.
(5)
Press the key
sequence
0
6
SHIFT
STORE
SF
SHIFT
|
SF
(6)
Verify that Input
A
and
B
TRIG LEDs
are
flashing,
and
that the
displayed
waveform
is
as
shown
in Fig.
6.16.
Fig. 6.16
Trigger
Level
Waveform
(7)
Move
the oscilloscope probe
to
the
TRIG
.^ER
LEVEL
B
OUTPUT
pin
and
verify
that the
same waveform
is
obtained.
(8)
Press the key
sequence
SHIFT
STORE
(9)
Disconnect
the
test
equipment.
1
SHIFT
SF
.
6-33
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