
Specifications
Power Meter Supplemental Characteristics
Measurement Noise
Power sensor dependent (refer to Table
Averaging effects on measurement noise. Averaging over 1 to 1024 readings is available for reducing noise. Table
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 |
| 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | 512 | 1024 |
Averages |
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Noise Multiplier |
| 5.5 | 3.89 | 2.75 | 1.94 | 1.0 | 0.85 | 0.61 | 0.49 | 0.34 | 0.24 | 0.17 |
(Normal Mode) |
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Noise Multiplier |
| 6.5 | 4.6 | 3.25 | 2.3 | 1.63 | 1.0 | 0.72 | 0.57 | 0.41 | 0.29 | 0.2 |
(x2 mode) |
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Agilent E4418B/E4419B Service Guide |