Keysight Technologies N9340B, User Manual

Page: 57 / 172

Making Measurements
Making Distortion Measurements
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Figure 4-13 Identifying Analyzer Distortion (O dB atten)
8 Press [AMPTD] > {Attenuation} > 10 > {dB} to increase
the RF attenuation to 10 dB.
Figure 4-14 Identifying Analyzer Distortion (10 dB atten)
The marker readout comes from two sources:
• Increased input attenuation causes poorer
signal-to-noise ratio. This causes the marker delta
value to be positive.
• Reduced contribution of the analyzer circuits to the
harmonic measurement causes the marker to be
negative.
A large marker delta value readout indicates significant
measurement errors. Set the input attenuator at a level
to minimize the absolute value of marker delta.