UTD2000M
User
Manual
Less
amplitude
trigger
can
be
used
to
trigger
the
pulse
signal
that
has
passed
one
trigger
level
but
has
failed
to
pass
another
one.
Less
amplitude
triggering
can
only
accept
those
triggers
aroused
by
pulses
within
two
prescribed
amplitudes
for
both
entry
and
exit.
Following
is
the
operation
steps
explained
by
taking
a
specific
case
as
an
example:
1
、
Press
MENU
key
located
in
the
trigger
control
area
to
enter
into
trigger
type
menu;
2
、
Then
press
F1
and
use
“
MULTIPURPOSE
”
knob
to
select
less
amplitude
pulse
in
the
ejected
menu,
then
press
“SELECT”
to
confirm
the
selection;
3
、
Press
F2
to
set
signal
source
as
CH1;
Now
the
waveform
we
see
can
not
be
triggered
stably;
4
、
Press
F3
to
select
high
and
low
level
respectively,
and
use
trigger
level
knob
to
adjust
the
corresponding
high
and
low
level
separately;
5
、
Press
F5
to
enter
into
less
amplitude
pulse
settings;
Less
amplitude
pulse
settings:
1
、
Press
F1
to
select
positive
or
negative
polarity;
2
、
Press
F2
to
select
specific
trigger
condition
(select
“
＞
”
as
for
this
case),
and
then
use
“MULTIPURPOSE”
knob
to
set
a
specific
trigger
time.
Fig
3
‐
12
Less
Amplitude
Pulse
Trigger
(Positive
Polarity)
72
