HP 83480A User Manual

Trigger Menu
This section describes the Trigger menu, and explains how you can use its
controls to trigger the instrument. The trigger circuit performs two functions.
It locates the waveform of interest, and it synchronizes the instrument
measurement and display to the waveform.
Trigger
Basics
A
trigger event
is
dened
as
an
edge
of
a
selected
slope
(either
positive
or
negative)
that transitions
through
a
selected
voltage
(trigger
level).
The
trigger
circuit
and
sampler
circuit
operate
in
parallel.
The sampler
samples
the
input
signal
at
a
specic
rate
.
The trigger
circuit
operates
independently
of
the
sampler
circuit,
and
a
trigger
event
does not
have
to
occur
at
the
same
time
as
a
sample
point.
Because the
instrument
knows
when
the
trigger
event
happened
in
relation
to
the
sampled data,
the
instrument
knows
where
to
place
the
sampled
data
on
the
display
.
There
are
three
green
LEDs
at
the
top
left
corner
of
the
mainframe
.
When
a
LED
is
lit,
it
indicates
the
trigger
status
of
the
instrument.
Armed The instrument is waiting for a trigger event to occur.
Triggered The instrument triggered on a valid trigger event.
Freerun The instrument is automatically triggered as soon as it is
armed. This is useful for seeing a waveform untriggered or
for
looking
at
a
baseline
.
HP
83480A
Option
100
only: When
in
the
12
GHz
mode
,
the
triggered
and
freerun
lights
are
illuminated
at
all times
to
reect
the
operation
of
the
12
GHz trigger
.
Refer to the User's Reference for the plug-in you
are using for details on the
trigger specications
.
6-50

HP 83480A Specifications

General

Brand	HP
Model	83480A
Category	Measuring Instruments
Language	English