Metek EX1200A SERIES, Руководство пользователя

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VTI Instruments Corp.
80 EX1200A Triggering
IVI-COM Programming Interface
The I VTEXDMM.Trigger interface provides properties and methods for setting the input trigger.
The I VTEXDMM.Trigger.Multipoint interface provides properties and methods for setting the
sample trigger and setting the measurement complete output trigger.
T
AKE THE
M
EASUREMENT
Once the DMM has been configured, the measurement must next be initiated. Once initialized, the
DMM moves from the
Idle State through the trigger model.
IVI-COM Programming Interface
The IVTEXDmmMeasurement interface provides properties and methods for reading the FIFO
count and measured values. Initiate method can be used for initiating the DMM. FIFOCount can
be used to get a count of the measured values available in the DMM after it is initiated.
R
ETRIEVE THE
D
ATA
The DMM stores the measured samples into FIFO until retrieved. This data can be accessed upon
completion of the measurement and must be retrieved to be read. The data is automatically deleted
from FIFO once it has been retrieved.
IVI-COM Programming Interface
The IVTEXDmmMeasurement interface provides properties and methods for reading the FIFO
count and measured values. Read and ReadMultiPoint can be used to retrieve the measured value
without timestamp. Read will be used for retrieving single measurement at a time whereas the
ReadMultiPoint can retrieve a block of data.
ReadTimeStamped and ReadMultiPointTimeStamped can be used for retrieving measured
values with time stamp. The ReadTimeStamped will be used for retrieving single measurement
with timestamp whereas ReadMultiPointTimeStamped can retrieve a block of data with time
stamp.
Note that all four read measurement functions initiate the DMM and retrieve the measured values,
whereas fetch only retrieves the measured values without initiating the DMM.