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Zero Test
Specification
Electrical Characteristics
Accuracy: Zero set (Digital settability of zero)
1. 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
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 µW
(0.24x512).
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 .................................. Agilent 11683A
Power Sensor Cable ............................. Agilent 11730A
Test Setup
Power Meter
Figure 2-1: Zero Test Setup
Agilent E4418B/E4419B Service Guide
±
0.05 µW. The calibrator measurement
CHANNEL A
Agilent 11730A
Performance Tests
Zero Test
Performance Limits
1
±0.0764 µW
Range
Calibrator
POWER
METER
2-5
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