Zero Drift Of Sensors; Measurement Noise; Noise Multiplier - Agilent Technologies E4418B User Manual

Zero Drift of Sensors

Power sensor dependent (refer to Table 5-3).

Measurement Noise

Power sensor dependent (refer to Table 5-2 and Table 5-3).
Averaging effects on measurement noise. Averaging over 1 to 1024 readings is
available for reducing noise. Table 5-3 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:
Number of Averages

Noise Multiplier

(Normal Mode)
Noise Multiplier
(x2 mode)
Agilent E4418B User's Guide
(<45 pW x 2.75) = <124 pW
Table 5-2: Noise Multiplier
1 2 4 8
5.5 3.89 2.75 1.94
6.5 4.6 3.25 2.3
Power Meter Supplemental Characteristics
16 32 64 128
1.0 0.85 0.61 0.49
1.63 1.0 0.72 0.57
Specifications
256 512 1024
0.34 0.24 0.17
0.41 0.29 0.2
5-7