Dynamic range
The dynamic range required to test the AUT is the difference, in decibels, between maxi-
mum boresite level and minimum AUT level that must be measured. Examples of these
include side-lobe level, null depth, and cross-polarization levels.
Measurement accuracy/signal-to-noise ratio
Measurement accuracy is affected by the measurement sensitivity of the system. The
signal-to-noise ratio will directly impact the measurement accuracy of the system for
both amplitude and phase measurements. Figure 15 illustrates the relationship between
signal-to-noise ratio and magnitude and phase errors.
Figure 15. Measurement accuracy as a function of signal-to-noise ratio.
Determine your signal-to-noise ratio based on the magnitude and phase errors you can
accept.
26 | Keysight | Antenna Test – Selection Guide
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