Resolution Bandwidth (Res Bw); Alignments - 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

Resolution Bandwidth (Res BW)

In NF Mode, the Res BW settings increase the measurement speed and quality

of a measured noise figure. The wider (higher) the Res BW, the faster and

better the noise figure measurement. However, as the Res BW is narrowed, the

sweep speed becomes slower and the measurement quality is degraded.

So: Wider Res BW = better noise measurement and faster measurement time

How to set Res BW

— Press BW 2.

— Then choose from the following:

The current Res BW setting is shown at the bottom of the screen.

This setting could impact the accuracy of the measurement. See Specifications

in http://literature.cdn.keysight.com/litweb/pdf/5990-9783EN.pdf.

The Noise Figure mode requires alignment types: amplitude. Refer to the SA

Keysight N9927-90001 User's Guide

Avoid setting the resolution bandwidth (Res BW) greater than the

bandwidth of the measured DUT.

300 KHz | 1 MHz | 3 MHz | 5 MHz

"Alignments" on page 180

Press the desired resolution

for information on all alignments.

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