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National Instruments Corporation
37
NI 5622 Calibration Procedure
12. Fetch in chunks the waveform in digitizer memory by repeating steps
12a through 12e thirty-one times. The result is a downconverted,
resampled waveform used in step 13.
a.
Configure which point in the acquired waveform is the first to be
fetched using the niScope Property Node.
b.
Acquire a waveform using the niScope Fetch (poly) VI. Select the
WDT instance of the VI. Use the default value for the
timestamp
Type
parameter.
LabVIEW VI
C/C++ Function Call
Call
niScope_SetAttributeViInt32
with the
following parameters:
vi
: The instrument handle from
niScope_init
channelList
:
“0”
attributeId
:
NISCOPE_ATTR_
FETCH_RELATIVE_TO
value
:
NISCOPE_VAL_START
(for iteration 1),
NISCOPE_VAL_READ_POINTER
(for iterations
2 through 31)
LabVIEW VI
C/C++ Function Call
Call
niScope_Fetch
with the following
parameters:
vi
: The instrument handle from
niScope_init
channelList
:
“0”
timeout
:
5.0
numSamples
:
1,000,000
