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E1437A
ASCII Overview and Commands
Query syntax:
TRIGGER:ADCLEVEL?
TRIGGER:DELAY?
TRIGGER:GEN?
TRIGGER:MAGLEVEL?
TRIGGER:SLOPE?
TRIGGER:TYPE?
Example Statement:
OUTPUT 70924;"Trigger:setup 1,256,25.6,0,0,1"
OUTPUT 70924;"trigger:type?"
Description:
An E1437 can be triggered to collect data in a variety of ways. The trigger can be
internally generated or can come from an external source. Multiple modules can be
triggered synchronously. A variable pre- and post-trigger delay can be programmed
for data collection. The slope and level of the trigger point on a signal can be
selected. The source of the internal trigger can be either the output of the ADC or
the magnitude of the complex output of the decimation filter.
TRIGGER:SETUP is the command that sets all trigger parameters at once. An E1437
will generate a trigger only when it is in the TRIGGER state and the SYNC line on
the VXI backplane is released. When a trigger is generated, the E1437 will release
the SYNC line.
Parameter Definitions:
parameter
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determines the trigger source.
value
USER disables the module from any event-driven trigger generation though it is still
possible to force the module to trigger a measurement by pulling the SYNC line once the
0
module is in the trigger state. You may do this by calling the MEAS:START function,
waiting for the module to reach the trigger state, then triggering the measurement by
using MEAS:CONTROL to pull the SYNC line.
1
ADC generates a trigger based on the raw data samples from the ADC
EXTERNAL uses transitions on the signal applied to the BNC external trigger connector on
2
the front panel.
MAG generates a trigger based on the log magnitude of the signal after it has been
3
filtered to a selectable bandwidth around the center frequency established by the
FREQUENCY:SETUP function.
4
IMMEDIATE triggers a measurement immediately upon entering the trigger state.
type parameter definition
TRIGGER:SETUP
command/query
5-51
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