Musings of a Wireless Muzungu
Note: this was tested on Software Version 08.0.61 of the ICX switch firmware. If you are using a different release, you may want to verify my findings. Introduction I recently came across an interesting problem when trying to add more than one DHCP address pool to my home laboratory’s ICX 7150-C12P switch. I wanted to […]
Thus far in this series on Understanding Noise we have looked at: Part 1: Defining Noise Part 2: Sources of Noise Part 3: Noise Spectral Density Part 4: Noise Factor, Noise Figure and Noise Temperature Modern radio receivers and electronic communications circuits consist of filters, amplifiers and mixers connected in series. Each component contributes to […]
Previous posts in this series: Understanding Noise – Part 1: Defining Noise Understanding Noise – Part 2: Sources of Noise Understanding Noise – Part 3: Noise Spectral Density Digital communication systems require received signals to be filtered and amplified before they can be demodulated and passed to the analog to digital converter. Similarly, transmitted signals […]
Previous posts in this series: Understanding Noise – Part 1: Defining Noise Understanding Noise – Part 2: Sources of Noise In this post I want to discuss Noise Spectral Density. Noise Spectral Density Noise Spectral Density or Noise Density, (No) is a measurement of the noise power per Hertz. For white noise, which is constant […]
Previous posts in this series: Understanding Noise – Part 1: Defining Noise Sources of Noise Thermal Noise The first major contributor to noise inside electronic components comes in the form of Thermal or Johnson-Nyquist Noise. This noise is present even when there is no current actually passing through any component. It is present even when […]
One of the supposedly simple things that plagues me in communications theory is the idea of noise. We are all very comfortable talking about noise. We refer to noise, the noise floor and interference all the time quite glibly. Yet I must admit, I have always felt like I never truly understood the topic. In this […]
My System Specifications I am running Dietpi on an ODroid C2. Here are the Details of my OS, most recently updated at the time of this posting.: root@dietpi:~# cat /etc/*-release PRETTY_NAME=”Debian GNU/Linux 8 (jessie)” NAME=”Debian GNU/Linux” VERSION_ID=”8″ VERSION=”8 (jessie)” ID=debian HOME_URL=”http://www.debian.org/” SUPPORT_URL=”http://www.debian.org/support” BUG_REPORT_URL=”https://bugs.debian.org/ The OS is currently in a default state, I have done nothing […]
“It is a secret in the Oxford sense. You may tell it to only one person at a time.” – Lord Franks (1905-1992) English academic, diplomat and philosopher SHA-1 In the world of telecommunications and technology, nothing lasts forever. When it comes to the issue of security, nothing is ever truly secure and nothing stays […]
This post is part of a series on building my Ruckus home laboratory environment. Previous articles in this series include: Building a Ruckus Home/Office Laboratory on a Budget – Part 1 Building a Ruckus Home/Office Laboratory on a Budget – Part 2 My Ruckus Laboratory – Home Network Architecture & Limitations My Ruckus Laboratory – […]
In my previous post we covered the configuration of some basic layer 3 services for my Ruckus ICX 7150-C12P which is going into my home laboratory. But now we actually want to start plugging things in and turning APs ON! In this post I dig into the details of working with PoE on the ICX […]