Calibration Wizard; When To Calibrate - Keysight Technologies FieldFox A Series User Manual

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Noise Figure Mode (Option 356 – CPU2 Only)

Calibration Wizard

The Noise Figure mode has two types of calibration wizard softkeys: Receiver

Cal and User Cal.

A receiver calibration is required for a user calibration. On the Fieldfox,

after you have completed a user calibration, the User Cal (User Cal)

annotation overwrites the displayed Receiver Cal (Rcvr Cal) annotation.

To access the calibration wizards:

— Press Cal then

Noise Figure has two different calibrations that are important to run,

depending on the type of measurement you are using:

— Receiver calibrations (required for all measurements).

— User calibrations (required, if the setup uses an external preamplifier).

Understanding Receiver and User Calibrations

This section contains the following:

Receiver Calibration (Receiver Cal):

When there is no preamplifier in the measurement, only a receiver

calibration is required.

The receiver calibration's purpose is to establish the true measurement

bandwidth of the receiver when making noise measurements. This bandwidth

information is used to calculate the gain of the DUT when there is no user

calibration. But, if there is a user calibration, the gain calculation is

independent of the receiver bandwidth from the receiver calibration. The

Keysight N9927-90001 User's Guide

Run Receiver Cal

Run User Cal

— follow the prompts

"Receiver Calibration (Receiver Cal):"

"User Calibration (User Cal):"

"Optimizing Measurement Accuracy:"

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