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National Instruments Corporation
11
NI PXIe-6672 Calibration Procedure
b.
Call niSync Measure Frequency VI to measure the frequency of
the oscillator.
c.
Call niSync Close VI to close the session handle.
3.
Compare the measured frequency to the device specifications.
4.
If the measured frequency is still outside of the specified limit, repeat
steps 1–3 of the
section until the measured value falls
within the acceptable frequency range for your module, as shown in
Table 1,
.
5.
Commit the calibration values to the Calibration EEPROM using the
following procedure.
a.
Call niSync Initialize External Calibration VI to initialize the
process.
Note
NI
is the default user password. If you have changed the calibration password, use
your user-selected calibration password in place of
NI
.
LabVIEW Block Diagram
NI-SYNC C Function Call
Call
niSync_MeasureFrequency
with
the following parameters:
vi
:
“<
SessionHandle>”
sourceTerminal
:
NISYNC_VAL_OSCILLATOR
duration
:
0.5
actualDuration
:
*actualDuration
measuredFrequency
:
*measuredFrequency
error
:
*error
LabVIEW Block Diagram
NI-SYNC C Function Call
Call
niSync_close
with the following
parameter:
vi
:
“<
SessionHandle>”