---
title: "Model 201E | 150 ps Rise Time Electrical Module"
date: 2025-01-06T09:30:18Z
modified: 2025-10-01T05:00:52Z
permalink: "https://www.berkeleynucleonics.com/model-201e/"
type: page
status: publish
excerpt: ""
wpid: 19658
---

  [ A 

####  What Is Phase Noise? 

 



 ](#) 

Phase noise is the noise produced by fast, short term fluctuations in a signal. Phase noise diminishes the signal quality and increases error rates in communication links. Although there is no such thing as “no” phase noise, the less you have, the better.