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Overview
Service Equipment You Will Need
h. 8491A Option H33 is a fixed attenuator which has been characterized to have a VSWR ≤ 1.05:1 at 50
MHz. A VSWR of 1.05:1 is recommended to test Input Attenuator Switching Uncertainty, Display
Scale Fidelity, and Absolute Amplitude Accuracy performance tests. Any 8491A/B attenuator can be
mapped into this device if the VSWR at 50 MHz has been characterized to be ≤ 1.05:1. When map-
ping the attenuator, to indicate that is meets the required specification, the Option H33 checkbox will
need to be checked in the configure test station Administration screen.
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