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3.
4.2.
2. 2
Pressing the
TRIG-LEVEL
key
0
)
displays Input
A
or
B's
current
trigger
level
and
causes the
TRIG-LEVEL
LED
to flash.
3.4.
2. 2.
3
This displayed trigger level
can
now
be changed up
(
t
)
or
down
(
j
)
in
20
mV
steps (XI)
or
200
mV
steps
(X10) using
either the
LEVEL
1
1
keys
0)
»
or
a
new
trigger
level
entered
from
the
keyboard.
'
3.4.2.
2.4
Press
the
TRIG-LEVEL
key
(
0
)
again
to
return the counter
to
its
main
function and store the displayed
trigger level.
The
TRIG-LEVEL LED
should stop
flashing.
The key sequence
for
manual
trigger level
step-up/down and
store
is
TRIG-
LEVEL
0
)
LEVEL
H
@
TRIG-LEVEL
0
)
.
3. 4. 2. 2.
5
Any
manual
trigger level that
is
out-of-range
will
produce
an
,T
Op
Er" display
message.
For
example,
entering
47.2V
as
a
trigger level
in
XI
attenuation
will
generate
an
tr
Op
Er"
display
message.
The
operator should
press the
CONTINUE key0)to
return
to
the previous
trigger setting
in
the
measurement mode;
select
X10
attenuation
0)
;
press the
TRIG-LEVEL
key
0
)
to
display
the
trigger level;
reenter 47.2V.
This
new
trigger level
may
be
stored
or
changed.
NOTE:
INPUT
A
and B each have
a single trigger-level
store.
Using
the
Auto-Trigger
mode
overwrites
a
manually
stored trigger
setting.
Also, pressing
the
AUTO-TRIG
key
0)
while
manually
setting the trigger level
enables
the
Auto-Trigger
mode.
Toggle
the
AUTO-TRIG
key
(0)
off,
then enter a
manual
trigger
leveL
S.4.2.3
Automatic
Trigger Setting
3. 4. 2.
3.1
Press the required
AUTO-TRIG
key
(0)
to
calculate
and
set the
auto-
trigger
level.
Automatic
attenuation occurs
in
the Auto-Trigger
mode.
3.
4.2.
3.
2
Press the
corresponding
TRIG-LEVEL
key
0
)
to display the auto-trigger
level.
The
TRIG-LEVEL
LED
will flash
when
the
trigger level
is
being
displayed.
3.
4.2.4
Single-Shot
Automatic
Trigger
3.4.2.4.1
Automatic
trigger settings
vary
as
peak
input levels
change.
To
execute and
store a single-shot auto-trigger
level:
a.
b.
c.
Enter
Special
Function
31 using
key sequence
31
SHIFT
0)
STORE
(0)
and
SF (0)
Enable
special functions using
key sequence
SHIFT
0
)
SF
0
)
Press the
AUTO-TRIG
key
(0
.
The
LED
lights
as the level
is
cal-
culated
and
set,
then
turns off
3-36
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