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