HP 54501A - Trigger Subsystem; Introduction

Trigger Subsystem
16
Introduction
The
commands
in the
TRIGGER
subsystem
are
used
to
define
the
conditions
for
a trigger.
Many
of the
commands
in the
Trigger
subsystem
are
used
in
more
than
one
of
the trigger
modes.
If
the
command
is
a valid
command
for
a
trigger
mode
that
setting will
be
accepted.
If
the
command
is
not
valid
for
a trigger
mode
an
error
will
be
generated.
You
must
be
sure
that
the
instrument
is
in the
proper
trigger
mode
for
the
command
being
sent.
The
instrument
can
be
placed
in
the
trigger
mode
from
the
front
panel
or
over
the
HP-IB.
One
method
of
insuring
the
instrument
is
in
the
proper
trigger
mode
is
to
send
the
:TRIGGER:MODE
command
in the
same
program
message
as
the
parameter
to
be
set.
As
an
example,
send:
":TRIGGER:MODE
TV; LEVEL
200
MV"
This will place
the
instrument
in
the
TV
Trigger
Mode
and
set
the
trigger
level
to
200
mV.
This
is
necessary
because
the
LEVEL
command
is
also
valid
for
the
other
trigger
modes.
The
Trigger
modes
are
described
on
the
next
few
pages
prior
to
the
command syntax.
Table
16-1
lists
the
different TRIGGER
subsystem
commands
that
are
available
for
each
trigger
mode.
Note
Auto
or
triggered
mode
is
selected
with
the
TIMEBASE.-MODE
command.
HP
54501A
Programming
Trigger
Subsystem
1&-1