Keysight x-series Measurement Guide

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Measuring Noise
Measuring Noise-Like Signals Using the Channel Power Measurement
The power reading is essentially that of the tone; that is, the total noise power is far
enough below that of the tone that the noise power contributes very little to the total.
The algorithm that computes the total power works equally well for signals of any
statistical variant, whether tone-like, noise-like, or combination.
Figure 7-6 Measuring Channel Power
Step Action Notes

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)