Manual
42
Model 835-M Programmer’s
Manual
V1.1 2011
:TRIGger
Subsystem
Triggers control
the
playback
by telling the
Model
835-M
when to play the signal.
Depending on the trigger
settings
for the
Model
835-M
,
the waveform
playba
c
k
can occur
once,
continuously,
or the
835-M
may start and stop playing the waveform repeatedly (GATE mode). A
trigger
signal comprises
both
positive
and negative
signal transitions (states),
which are
also called
high and low
periods.
You
can configure
the
835-M
to trigger on
eit
her
state of the trigger
signal.
It
is common
to have multiple
triggers, also
referred to
as
trig
ger
occurrences
or events,
occur
when the
signal
generator
requires
only a
single
trigger. In this situation, the
Model
835-M
recognizes
the first
trigger and
ignore
s
the rest.
When you
select
a trigger mode, you may
lose
the
signal
from the
RF
output until you trigger the
wavefo
rm.
There are four parts to
c
o
nfiguring the trigger:
1. Choosing
the trigger type which
controls
the waveform’s
tran
s
mission.
x NORMal
:
trigger edge
initiates/stops
sweeps
x
GATE :
trigger level
starts/stops
sweep
2. Setting the waveform’s
response
to triggers:
—
CONTinuous :
reapeatedly
accepts
trigger events
—
SINGle : uses
only one trigger
eve
nt
3.
Selecting
the trigger
source
which
determines
how the
Model
835-M
receives
its trigger signal,
internally or externally. The
GATE choice requires
an external trigger.
3. Setting the trigger polarity when
using
an external source
Command
Parameters
Unit
(defa
ult)
Remar
k
TRIGger[:SEQuence]:TYPE NORMal|GATE|POINt
N/A
V0.3.10
TRIGger[:SEQuence]:TYPE:GATE LOW|HIGH HIGH V0.3.10
TRIGger[:SEQuence]:SOURce IMMediate|
K
EY|EXT|BUS
IMM
V0.3.10
TRIGger[:SEQuence]:DELay <value> 0
s
V0.3.10
TRIGge
r[S
E
Qu
ence
]:SLOP
e
POSitive|NEGative POS V0.3.10
TRIGge
r[S
E
Qu
ence
]:RETRi
gger
ON|OFF|IMMediate OFF V0.3.10
[SOURce]:TRIGger[:SEQuence]:ECOunt <value>
1
V0.3.10
[SOURce]:TRIGGer[:SEQuence]:OUTPut:POLarity
[
S
OU
Rce]:TRIG
G
er[
:
SEQuence]
:
OU
TPut
:MODE
NOR
M
al|IN
V
erted
NOR
M
al|GAT
E|POINt
NORM
?
V0.3.10
V0.3.10
:TRIGger:TYPE
TRIGger[:SEQuence]:TYPE
NORMal
| GATE |
POINT
TRIGge
r[:SE
Q
uence
]
:TYP
E?
This command sets
the trigger type that
controls
the waveform’s playback.
The following list
describes
the trigger type
command
choices:
NORMal Upon triggering, the waveform sequence
plays according
to
settlings
defined by
:INITiate:CONTinuous
(only
once
or repeatedly)
GATE An external trigger
signal
repeatedly
starts
and
stops
the waveform’s
playback.
The
time duration for
playback
depends on the duty period of the trigger
signal
and the
gate polarity selection. The waveform plays during the inactive state and
stops during