Keysight NFA Series - Page 83

Chapter 2 63
Test Descriptions
Noise Figure Range and Accuracy
Table 2-15 4.5-6.5 dB Noise Source ENR Test Record
Actual NF range = 5 dB ENR - 10LOG (10^ (Actual
Attenuation
dB
/10) -1)
Measured NF range = 5 dB ENR - 10LOG (10^
(Measured Attenuation
dB
/10) -1)
Instrumentation Uncertainty: = Actual NF - Measured NF
Table 2-16 14-16 dB Noise Source ENR Test Record
Actual NF range = 15 dB ENR - 10LOG (10^
(Actual Attenuation
dB
/10) -1)
Measured NF range = 15 dB ENR - 10LOG (10^
(Measured Attenuation
dB
/10) -1)
Instrumentation Uncertainty:
Range
dB
0.125 to 11 = Actual NF - Measured NF
Range
dB
12 to 15 = Actual NF - Measured NF +
Instrumentation Uncertainty at
11 dB (re-reference)
Table 2-17 20-22 dB Noise Source ENR Test Record
Actual NF range = 22 dB ENR - 10LOG (10^
(Actual Attenuation
dB
/10) -1)
Measured NF range = 22 dB ENR - 10LOG (10^
(Measured Attenuation
dB
/10) -1)
Instrumentation Uncertainty:
Range
dB
0.125 to 11 = Actual NF - Measured NF
Range
dB
12 to 22 = Actual NF - Measured NF +
Instrumentation Uncertainty at
11 dB (re-reference)