Specifications
Power Meter Supplemental Characteristics
Agilent E4418B/E4419B Service Guide
1-7
Measurement Noise
Power sensor dependent (refer to Table 1-2 and Table 1-3).
Averaging effects on measurement noise. Averaging over 1 to 1024
readings is available for reducing noise. Table 1-3 provides the
measurement noise for a particular power sensor with the number of
averages set to 16 for normal mode and 32 for x2 mode. Use the “Noise
Multiplier” for the appropriate mode (normal or x2) and number of
averages to determine the total measurement noise value.
For example, for an Agilent 8481D power sensor in normal mode with the
number of averages set to 4, the measurement noise is equal to:
(<45 pW x 2.75) = <124 pW
Table 1-2: Noise Multiplier
Number of
Averages
1
2
4
8
16
32
64
128
256
512
1024
Noise Multiplier
(Normal Mode)
5.5
3.89
2.75
1.94
1.0
0.85
0.61
0.49
0.34
0.24
0.17
Noise Multiplier
(x2 mode)
6.5
4.6
3.25
2.3
1.63
1.0
0.72
0.57
0.41
0.29
0.2
4402serv.book Page 7 Tuesday, October 14, 2003 3:18 PM
Summary of Contents for E4418B
Page 19: ...1 Specifications 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
Page 37: ...2 Performance Tests 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
Page 69: ...3 Adjustments 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
Page 81: ...4 Theory of Operation 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
Page 95: ...5 Replaceable Parts 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
Page 119: ...6 Troubleshooting 4402serv book Page 1 Tuesday October 14 2003 3 18 PM ...
