2 Performance Tests
28 Keysight E4416A/E4417A Power Meters Service Guide
Zero Test
Specification
Description
After the power meter is initially calibrated and zeroed, the change in the digital
readout is monitored. This test also takes drift and noise into account, since drift,
noise and zero readings cannot be separated.
Equipment
– Range Calibrator: Keysight 11683A
– Power Sensor Cable: Keysight 11730A
Electrical Characteristics Performance Limits
Accuracy: Zero set (Digital settability of zero)
±0.0764 mW
[a]
[a] This performance limit is determined by the zero set specification of the power sensor used in the measurement plus the measurement noise.
The range calibrator has a zero set specification of ±0.05 mW. The calibrator measurement noise specification is 110 nW at 16 averages. At
512 averages a noise multiplier of 0.24 is required, giving a measurement noise specification of 0.0264 mW (0.24x512).
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