8.
Disable the calibrator output.
Verifying Input Capacitance
Follow this procedure to verify in the input capacitance of the PXIe-5164 using an
oscilloscope calibrator.
Table 8. Input Capacitance Verification
Config
Vertical Range (V
pk-pk
)
Test Limit (pF)
Measurement Uncertainty (pF)
6
0
0.25 V
17.7 to 22.7
±0.52
1
2.5 V
17.7 to 22.7
±0.52
2
25 V
17.7 to 22.7
±0.52
1.
Connect the calibrator test head to channel 0 of the PXIe-5164.
2.
Configure the PXIe-5164 with the following settings:
•
Input impedance: 1 MΩ
•
Maximum input frequency: 300 MHz
•
Vertical offset: 0 V
•
Vertical range: the Vertical Range value from the
Input Capacitance Verification
table
•
Sample rate: 1 GS/s
•
Minimum number of points: 50,000 samples
3.
Configure the calibrator to measure capacitance.
4.
Enable the calibrator.
5.
Wait 1 second for settling, then record the measured capacitance.
6.
Compare the measured capacitance to the appropriate Limit from the
7.
Repeat steps 2 through 6 for each configuration listed in the
8.
Connect the calibrator test head to channel 1 of the PXIe-5164 and repeat steps 2 through
6 for each configuration listed in the
Input Capacitance Verification
table.
9.
Disable the calibrator output.
6
Measurement uncertainty based on Fluke 9500B with Fluke 9530 test head specifications that
apply at T
cal
± 5 °C, where Factory T
cal
= 23 °C. Uncertainty of the 9500B includes long-term
stability of 1 year, temperature coefficient, linearity, load, and line regulation and traceability of
factory and National Calibration Standard.
PXIe-5164 Calibration Procedure
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© National Instruments
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