Table 4. AC Amplitude Accuracy Verification
Config
Input
Impedance
(
Ω)
Vertical
Range
(V
pk-pk
)
Test
Point
(V
pk-pk
)
DMM
Range
(Vrms)
As-
Found
Limits
(dB)
As-Left
Limits
(dB)
Measurement
Uncertainty
(dB)
2
1
50
0.2
0.1
0.05
±0.15
±0.10
±0.018
2
50
0.7
0.35
0.50
±0.15
±0.10
±0.012
3
50
1.4
0.7
0.50
±0.15
±0.10
±0.014
4
50
5
2.5
5.00
±0.15
±0.10
±0.013
5
50
10
5
5.00
±0.15
±0.10
±0.017
6
1 M
0.2
0.1
0.05
±0.15
±0.10
±0.018
7
1 M
0.7
0.35
0.50
±0.15
±0.10
±0.011
8
1 M
1.4
0.7
0.50
±0.15
±0.10
±0.014
9
1 M
5
2.5
5.0
±0.15
±0.10
±0.013
10
1 M
10
5
5.0
±0.15
±0.10
±0.017
11
1 M
40
20
50.0
±0.25
±0.18
±0.048
12
1 M
80
20
50.0
±0.25
±0.18
±0.048
2
Measurement Uncertainty
is based on the following equipment and conditions:
•
NI PXI-4071 specifications apply after self-calibration is performed and in an ambient
temperature of 23 °C ± 5 °C.
18
|
ni.com
|
PXIe-5172 Calibration Procedure