62
Chapter 2
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 63.
8
-73
19
9
-74
20
10
-75
21
11
-76
22
Table 2-14
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
Summary of Contents for N8972A
Page 9: ...ix Declaration of Conformity N8972A ...
Page 10: ...x Declaration of Conformity N8973A ...
Page 11: ...xi Declaration of Conformity N8974A ...
Page 12: ...xii Declaration of Conformity N8975A ...
Page 19: ...Contents xix ...
Page 20: ...xx Contents ...
Page 108: ...88 Chapter2 Test Descriptions Measurement Jitter ...
Page 124: ...104 Chapter3 Technical Specifications General Specifications ...
Page 136: ...116 AppendixA Model N8972A Test Records Measurement Jitter Test Record ...
Page 148: ...128 AppendixB Model N8973A Test Records Measurement Jitter Test Record ...
Page 160: ...140 AppendixC Model N8974A Test Records Measurement Jitter Test Record ...
Page 174: ...154 AppendixD Model N8975A Test Records Measurement Jitter Test Record ...