HP 54501A Programming Reference Manual page 285

When the "user defined" standard
is selected,
the source and level are
set
in the same manner
as
before.
The QUALIFY
command
is
used to
set
the "qualify
on"
field. This
command
uses
the parameters
HIGH
and
LOW.
The
edge defined by the QUALIFY
command must occur within the
range
of time values that are
displayed
in the next front panel field. The
TRIGGER:CONDITION RANGE
command sets
the
greater
than and
less
than time
values.
In order
to actually generate
a
trigger the qualified
conditions must be met within the specified time.
To
set
the time values
send
"TRIGGER:CONDITION RANGE,
<
gt_value
>,
<
lt_value
>".
The
next field "trigger
on" is set
with the
OCCURRENCE
command and
OCCURRENCE:SLOPE
command.
To
set
the number of
occurrences
send the
command
":TRIGGER:OCCURRENCE
< number
>"
and to
set the slope
for the occurrences send the command
":TRIGGER:OCCURRENCE:SLOPE POSITIVE". The slope command
can also use
NEGATIVE
as a parameter.
The description
for each
of
the commands will tell you
in which modes
that command
is
valid.
See figure 16-1 for
Trigger
subsystem commands syntax
diagram.
Trigger Subsystem
16-8
HP 54501A
Programming