NI 5421/5441 Calibration Procedure
38
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8.
Call
niFgen_CalAdjustMainPathPreAmpOffset
(niFgen Cal
Adjust Main Path Pre Amp Offset VI) using the following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
configuration
: The
Current Configuration
value for the current
iteration from Table 7
•
gainDACValues
: An array containing two elements—the two
values (
2000
,
1000
) that you set as the gain DAC in the order that
you measured them
•
offsetDACValues
: An array containing two elements—the two
values (
50000
,
15000
) that you set as the offset DAC in the order
that you measured them
•
measuredOutputs
: An array containing three elements—the
three output voltages (
measurement 0
,
measurement 1
,
measurement 2
) that you measured in the order that you
measured them
Adjusting the Main Path Pre-Amplifier Gain
1.
Call
niFgen_SetAttributeViInt32
to set the analog path value
(niFgen property node:
Output Attributes»Analog Path
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_ANALOG_PATH
•
value
:
NIFGEN_VAL_FIXED_LOW_GAIN_ANALOG_PATH
2.
Call
niFgen_SetAttributeViReal64
to set the post-amplifier
attenuation (niFgen property node:
Calibration»Post-Amplifier
Attenuation
) using the following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_POST_AMPLIFIER_ATTENUATION
•
value
:
0
