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Appendix A
TYPE
EXECUTION
SYNTAX
DESCRIPTION
The Set Trigger Configuration (
configured. Upon execution of this command the unit enters the acquiring mode. This will be indicated on the
front panel by the flashing of the TRIGGER light. If a pre-trigger has been configured (via the
the sampling for pre-trigger data will begin at this time.
Since the Set Trigger Configuration command controls the configuration of an acquisition, all other acquisition
dependent commands should be sent before the Set Trigger Configuration command is sent to the unit. The
commands which should be sent to the unit prior to the Set Trigger Configuration command will depend on the
desired start and/or stop triggers. For instance, if configuring for Trigger on Command, it would not be necessary
to send the Set Trigger Level (
The following table lists the valid trigger types and their associated required prior issue commands.
Start/Stop
Trigger
Type
Note: If the start and stop triggers are of different types, a combination of the start and stop prior issue
The Set Trigger Configuration (
It sets the sources to determine when an acquisition is to be initiated and when it is to be terminated. It also
determines how these acquisition sources are to be (if at all) synchronized with the internal scan intervals (
command. Likewise, it may allow the acquisition to re-enable itself (with the same configuration) after the initial
acquisition has been terminated.
NetScan User's Manual
T
- Set Trigger Configuration
Acquisition
Deferred
Tstart,
Configure an acquisition of scan data with the following parameters:
stop,
start
,
re-arm
stop
sync
re-arm
sync
T?
Query the present trigger configuration
T
) command is the central command which controls how an acquisition is to be
L
) command.
Start/Stop Trigger Definition
0
None - Event Not Defined
1
Trigger on Command(See
4
Trigger on Channel Above Level (
5
Trigger on Channel Below Level (
6
Trigger on TTL Signal Rising
7
Trigger on TTL Signal Falling
8
Trigger on Count (
9
Trigger on Alarm Turning On (
10
Trigger on Alarm Turning Off (
11
Trigger on Absolute Time (
commands is required.
T
) command is used to configure the manner in which scans are to be acquired.
is the start event
is the stop event
determines if the unit should continue acquiring after the first
acquisition completes, where
determines if acquisition events should be synchronized with the
internal timebases, where
1
@
command)
L
command)
L
command)
Y
command)
C
command)
command)
C
P
command)
API Command Reference
1
is on and
0
is off.
is on and
is off.
0
Y
Pre-Trigger/
Required Prior Issue
Post Stop
Commands
(N/A)
(N/A)
(N/A)
(N/A)
yes
I,Y
no
yes
I,Y,L
no
I,L
yes
I,Y,L
no
I,L
yes
I,Y
no
I,Y
yes
no
I,Y
—
yes
I,Y,C,A
no
I,C,A
(
A
yes
I,Y,C,A
no
I,C,A
(
A
I,Y,P
yes
no
I,P
command), then
I
I
I
(
A
is optional)
is optional)
(
is optional)
A
is optional)
I
)
A-43
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