NI 5421, Процедура калибровки

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26 | ni.com | NI 5421/5441 Calibration Procedure
• attributeID :
NIFGEN_ATTR_ANALOG_PATH
• value :
NIFGEN_VAL_MAIN_ANALOG_PATH
8. Call
niFgen_SetAttributeViReal64
to set the gain (NI-FGEN Gain property) using
the following parameters:
•
vi : The session handle returned from
niFgen_InitExtCal
• channelName :
"0"
• attributeID :
NIFGEN_ATTR_ARB_GAIN
• value :
1
9. Call
niFgenSetAttributeViBoolean
(NI-FGEN Output Enabled property) to enable
the NI 5421/5441 output. Use the following parameters:
•
channelName :
"0"
• attributeID :
NIFGEN_ATTR_OUTPUT_ENABLED
• value :
VI_TRUE
• vi : The session handle returned from
niFgen_init
10. Call
niFgen_ConfigureSampleRate
(niFgen Set Sample Rate VI) using the following
parameters:
•
vi : The session handle returned from
niFgen_init
• Sample Rate : 100 MS/s (
100000000
)
Repeat steps 11 through 20 for each iteration in Table 8, changing the Number of Samples and
Number of Cycles for each iteration.
Table 8. NI 5421/5441 Setup for Main Analog Path Flatness Verification
Iteration Frequency
Number of
Samples
Number of
Cycles
Published Specification
Low-Gain
Amplifier
High-Gain
Amplifier
1 50 kHz 2,000 1 REF REF
2 100 kHz 1,000 1 -1.0 dB to
+0.5 dB
-1.2 dB to
+0.5 dB
3 1 MHz 1,000 10 -1.0 dB to
+0.5 dB
-1.2 dB to
+0.5 dB
4 5 MHz 1,000 50 -1.0 dB to
+0.5 dB
-1.2 dB to
+0.5 dB
5 10 MHz 1,000 100 -1.0 dB to
+0.5 dB
-1.2 dB to
+0.5 dB
6 15 MHz 1,000 150 -1.0 dB to
+0.5 dB
-1.2 dB to
+0.5 dB