National Instruments PXIe-5665, Calibration Manual, Page: 84 / 85

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Appendix B: Power Sensor Calibration Factor
Uncertainty
Table 56.
Combiner Paths
Combiner Path Start Stop
Total
Loss
*
(dB, max.)
Isolation
†
(dB, min.)
VSWR
‡
(max.)
2 1 >700 MHz 10 GHz 8.0 20 1.75
2 18.0
2 1 >10 GHz 14 GHz 8.0 20 2.00
2 18.0
*
Total Loss
includes the splitter loss at either input or output ports. The unused input port is terminated
in 50 Ω .
†
Isolation
is the loss between input ports. The output port is terminated in 50 Ω .
‡
VSWR
includes any port. All other ports are terminated in 50 Ω .
Table 57. Maximum Power Sensor Calibration Factor Uncertainty
Frequency Calibration Factor Uncertainty (%)
10 MHz ≤ 1.15
20 MHz ≤ 0.80
30 MHz ≤ 0.65
40 MHz to 200 MHz ≤ 0.55
300 MHz to 400 MHz ≤ 0.60
500 MHz to 1 GHz ≤ 0.50
2 GHz to 4 GHz ≤ 0.60
5 GHz ≤ 0.75
6 GHz ≤ 0.80
7 GHz ≤ 0.85
8 GHz ≤ 0.90
9 GHz ≤ 0.95
10 GHz ≤ 1.00