Specifications

trlgU/auto
Key
The trig'd/auto
selection
toggl€s
betcrcen
the
two triggcr
modcs.
The
cturent
selection
is displayed in
inverse vidco.
This field
is
arnilable in
all
trigger
menus.
In
the
trig'd
mode,
the oscilloscope does
not
display
data
until all
of the
trigger
requirements
are satisfied.
While
waiting
for
the
trigger
requirements,
the message an'aitingnigr
is
displayed.
In
the auto
mode,
if
a
trigger
is not found"
a trigger
is
generated
and
acquired
data
is
displayed. A
status
message
is
displayed
in
the upper
left
corner
of the
scroen.
source Key
The sourte key
selects the
trigger
souroe.
The
options
are
channels 1
or 2,
or external uiger.
The
current
selection
is
highlightsd
in
inverse video.
level
Key
The
level
key
sets the trigger level.
The
range
on this
function is
+
12
divisions
from
center.
It
provides
flexibility
for
sening
exact
triggering
points
and specifies levels used in the
more
sophisticated
triggering
modes.
The
center
can also be selected
with
centered.
slope
Key This field is
not
labeled,
however, the
available
selections
are
graphic
representations
of the
rising
edge and falling
edge The
current selection
i5
highlighrcd
in inverse video.
noise
reiect
Key Turn noise reject
on for triggering on noisy.signals
without
the
problem
of
false triggering.
holdoff
Key Pressing
the
holdoff key
assigns
the
entry
devices
to control
holdoff.
Holdoffdisables
the trigger circuit
for
a
selectable
time
period
or
number
of events after the trigger event. Holdoffis
selected in
20 ns
time
increments, from
40
ns
to 320
ms
or
in number
of events
from 2
to
15 000
000.
Time and event
are toggled
with
the knob.
Events
are
number of
patterns (patrn),
state
(state),
or edge
and
w
(edge).
HP
545104
Front-Panel
Reference
Trigger
Menu
s3