Agilent Technologies NFA Series, Performance Verification And Calibration Manual

Page: 73 / 184

Chapter 2 61
Test Descriptions
Noise Figure Range and Accuracy
Equation 1
Range
dB
0.125 = Metrology Data
dB
at 1dB / 8
Range
dB
0.5 = Metrology Data
dB
at 1dB / 2
Range
dB
1 to 11 = Metrology Data
dB
from 1 to 11
Range
dB
12 to 22 = Metrology Data
dB
from 1 to 11 + (11dB to re-reference)
Equation 2
Range
dB
0.125 = Measured Attenuation
dB
at 1dB / 8
Range
dB
0.5 = Measured Attenuation
dB
at 1dB / 2
Range
dB
1 to 11 = Measured Phot
dB
Ref 1 - Measured Phot
dB
from -55 to -65
Range
dB
12 to 22 = Measured Phot
dB
Ref 2 - Measured Phot
dB
from -66 to -76 +
(11dB to re-reference)
NOTE
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 62.
8 -73 19
9 -74 20
10 -75 21
11 -76 22
Table 2-13 Noise Figure Range and Accuracy Test Worksheet
Attenuator
Step Size (dB) Input
Level
(dBm) Measured
Phot (dB) Range
(dB) Actual
Attenuation (dB)
Equation 1 Measured
Attenuation (dB)
Equation 2