Using Enr Tables - Keysight Technologies FieldFox A Series User Manual

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Noise Figure Mode (Option 356 – CPU2 Only)

How to Define a Noise Figure Measurement

Using ENR Tables

ENR tables are used to define the noise source(s) used in DUT measurements,

receiver, and user calibration(s). Additionally, ENR tables are used along with

DUT tables, preamplifier tables, and information collected during the

measurement to compute the measurement uncertainty. Refer to

— Both gain and noise figure measurement accuracy will be enhanced by

— It is not necessary to use the same noise source in the user calibration as

How to Create an ENR Table

To create an ENR table:

This procedure assumes you have previously set your frequency, resolution

bandwidth, and number of points. Refer to

Measurement Procedure" on page

For this procedure, refer to

1. Press Measure >

3. Then choose:

4. Then edit the table as necessary for your devices and measurements by

Keysight N9927-90001 User's Guide

using a noise source with as low a reflection coefficient as possible for both

the noise figure measurement and the user calibration.

will be used in the measurement. In some cases, it might be better to use a

different noise source in the user calibration than will be used in the

measurement. If this is done, it is important to select the ENR table for the

calibration noise source prior to the calibration. And, then to select the ENR

table for the measurement noise source prior to measuring the DUT.

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