Agilent Technologies 4349B - Page 143

4349B
Initiate
State
If
the trigger
system
is
on
a
downward
path,
it
travels
directly
through
the
initiate state
without
restrictions.
If
the
trigger
system
is
on
an
upward
path,
and
INITiate:CONTinuous
is
ON
, then
it
exits
downward
to
an
event
detection
state
.
If
the
trigger system
is on
an upward
path
and INITiate:CONTinuous
is
OFF
,
then
it
exits
upward
to
the
idle
state
.
Event
Detection
State
Figure
5-7. Inside
an
Event
Detection
State
SOURce
The
:TRIGger:SOURce
command
species
which
particular
input
can
generate
the
event
required
to
continue
the
downward
path.
If
the
source
chosen
is
a
non-analog signal
such
as
BUS
,
then
no
further
qualications
are
required
to
generate
an
event.
However
,
if
an
INTernal
or
EXTernal
analog
signal
is
chosen,
additional
qualications
may
apply
.
DELay
The
:TRIGger:DELay
command
allows
you
to
specify
a
time
delay
after
the
trigger
signal
is
detected.
F
or
example
,
you
may
want
to
delay
acquiring
data
until
5
milliseconds
after
the
positive
edge
to
allow
the
measured
signal
to
settle
.
Sending
*RST
sets DELay
to
zero
.
IMMediate The :TRIGger:IMMeditate command bypasses event detection,
DELay
qualications one time
. The upward path through
the event detection state
contains only one condition. If the condition is satised,
the trigger system
exits upward.
Sequence Operation State
The downward entrance to the sequence operation state forces the 4349B to start a
measurement. An upward exit is not allowed until the measurement is complete.
GPIB Reference 5-39