©
National Instruments Corporation
45
NI 5421/5441 Calibration Procedure
8.
Call
niFgen_CalAdjustMainPathPostAmpGainAndOffset
(niFgen Cal Adjust Main Path Post Amp Gain And 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 9
•
mainDACValues
: An array containing two elements—the values
(
0
,
0
)—that you set on the main DAC
•
gainDACValues
: An array containing one element—the value
(
2000
)—that you set on the gain DAC
•
offsetDACValues
: An array containing two elements—the two
values (
50000
,
15000
)—that you set on the offset DAC in order
•
measuredOutputs
: An array containing two elements—the
two output voltages (
measurement 0
,
measurement 1
)—that
you measured in order
Adjusting the Direct Path Gain
1.
Call
niFgen_WriteBinary16AnalogStaticValue
(niFgen Write
Binary 16 Analog Static Value VI) to set the main DAC value using
the following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
value
:
0
2.
Call
niFgen_SetAttributeViInt32
to set the gain DAC value
(niFgen property node:
Calibration»Gain DAC Value
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_GAIN_DAC_VALUE
•
value
:
2000
3.
Call
niFgen_SetAttributeViInt32
to set the offset DAC value
(niFgen property node:
Calibration»Offset DAC Value
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_OFFSET_DAC_VALUE
•
value
:
32767
