18. Connect the DMM and function generator to channel 4 of the PXIe-5172 as shown in the
AC Verification Test Connections
figure and repeat steps 2 through 9 for each
AC Amplitude Accuracy Verification
table.
19. Disable the function generator output.
20. Connect the DMM and function generator to channel 5 of the PXIe-5172 as shown in the
AC Verification Test Connections
figure and repeat steps 2 through 9 for each
AC Amplitude Accuracy Verification
table.
21. Disable the function generator output.
22. Connect the DMM and function generator to channel 6 of the PXIe-5172 as shown in the
AC Verification Test Connections
figure and repeat steps 2 through 9 for each
AC Amplitude Accuracy Verification
table.
23. Disable the function generator output.
24. Connect the DMM and function generator to channel 7 of the PXIe-5172 as shown in the
AC Verification Test Connections
figure and repeat steps 2 through 9 for each
AC Amplitude Accuracy Verification
table.
25. Disable the function generator output.
Verifying
50 Ω
Bandwidth
Follow this procedure to verify the 50 Ω analog bandwidth of the PXIe-5172 by generating a
sine wave and comparing the amplitude measured by the PXIe-5172 to the amplitude
measured by the power sensor.
Before performing this procedure, complete the
procedures and
calculate the
splitter balance
and
splitter loss
of your power splitter.
Table 5.
50 Ω
Bandwidth Verification
Config
Sample
Rate
(S/s)
Vertical
Range
(V
pk-pk
)
Test Point
As-
Found
Limits
(dB)
As-Left
Limits
(dB)
Measurement
Uncertainty
(dB)
3
Frequency
(MHz)
Amplitude
(dBm)
1
125 M
0.2
0.05
-13
—
—
—
2
250 M
0.2
99.1
-13
-3.0 to
1.0
-2.5 to
0.9
±0.107
3
125 M
0.7
0.05
-2.1
—
—
—
4
250 M
0.7
100.1
-2.1
-3.0 to
1.0
-2.5 to
0.9
±0.113
3
Measurement uncertainty is based on the following equipment and conditions:
•
Rohde & Schwarz NRP-Z91 at 20 °C to 25 °C.
•
Harmonics from the signal generator are less than -30 dBc.
PXIe-5172 Calibration Procedure
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© National Instruments
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