Keysight NFA Series Performance Verification And Calibration Manual page 82

Table 2-14
Attenuator Input
Step Size (dB) Level
(dBm)
8 -73
9 -74
10 -75
11 -76
Equation 1
Equation 2
NOTE
Test Descriptions
Noise Figure Range and Accuracy
Noise Figure Range and Accuracy Test Worksheet
Measured
Phot (dB)
Range 0.125 = Metrology Data
dB
Range 0.5 = Metrology Data
dB
Range 1 to 11 = Metrology Data
dB
Range 12 to 22 = Metrology Data
dB
re-reference)
Range 0.125 = Measured Attenuation
dB
Range 0.5 = Measured Attenuation
dB
Range 1 to 11 = Measured Phot
dB
to -65
Range 12 to 22 = Measured Phot
dB
to -76 + (11dB to re-reference)
The ENR values given in the calculations are taken to be 5dB, 15dB and
22dB respectively. The actual and measured attenuations supplied
within the appropriate Test Records are calculated from in the equations
in the Tables on page 63.
62
Range Actual
(dB) Attenuation (dB)
Equation 1
19
20
21
22
at 1dB / 8
dB
at 1dB / 2
dB
from 1 to 11
dB
from 1 to 11 + (11dB to
dB
dB
Ref 1 - Measured Phot
dB
Ref 2 - Measured Phot
dB
Measured
Attenuation (dB)
Equation 2
at 1dB / 8
dB
at 1dB / 2
dB
dB
from -55
from -66
Chapter 2