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Satellite Technology

Solar or Sun Outage

Solar or Sun Outage

Solar outages affect satellite communications, including direct broadcast when the Sun moves behind the satellite. The noise it generates falls within the beam-width of the antenna and can disrupt reception of the required satellite signal. Read more . . .

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Cellular Telecommunications

Self Organising Networks, SON, Basics

With the need to keep costs down and provide greater levels of automation for deploying and maintaining base stations and cells, the concept of self-organising networks is now high on the agenda. Find out how they work.. Read more . . .

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Test and Measurement

VXI Modular Test Instrumentation System

The VXI system and VXIbus pioneered the way with chassis mounted test instrumentation. Based around the VMEbus, VXI is still widely used today, even though its smaller brother, PXI is more commonly seen. Read more . . .

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Cellular Telecommunications

GSM Tutorial

GSM or the Global System for Mobile Telecommunications has been the most successful mobile telecommunications system ever. Although 3G and then 4G systems are now taking over, it will be many years before GSM is totally superseded. It has been the system that really established mobile telecommunications. Read more . . .

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Rohde & Schwarz

Cellular telecommunications

Meik Kottkamp

Carrier Aggregation - How to Test the Key Enabler for LTE Advanced

Meik Kottkamp, Technology Manager at Rohde & Schwarz describes the key issues behind LTE Carrier Aggregation and shows how they can be tested effectively. Read more...

Featured Book
Wavelet Radio – Adaptive and Reconfigurable Wireless Systems Based on Wavelets

Wavelet Radio – Adaptive and Reconfigurable Wireless Systems Based on Wavelets
Homayoun Nikookar

This book provides a detailed description of wireless communications using...

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Test and Measurement

Signal Generator

Types of Signal Generator

There are several different types of signal generator that are available. Each type has its set of signals it can produce and as a result they are suitable for different applications. Read more . . .

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Electronic Components

Zener diode circuit symbol

Zener Diode / Voltage Reference Diode

Zener diodes, or more correctly voltage reference diodes are widely used to provide stable voltages within circuits. These diodes utilise one of two different mechanisms to provide the stable voltage. Read more . . .

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Circuits & Modules

Darlington Pair

Darlington Pair

The Darlington Pair is a circuit configuration that is widely used for providing high levels of gain and input impedance. However to obtain the best performance, its limitations must also be understood. Read more . . .

Electronic Components

Tunnel Diode

Tunnel Diode

The Tunnel diode can be used within microwave oscillators, amplifiers and mixers where it can be used as an 'active' device. Although not as widely used as some years back, it cna still find some useful applications. Read more . . .

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Facts of the day

25 May 2013

History - It was on this day in 1874 that Guglielmo Marconi was born in Bologna North Italy. He relentlessly pioneered much radio work, making the first transatlantic transmission when others thought it impossible. He was termed the "Father of Radio" by some.

Quote - The most exciting phrase to hear in science, the one that heralds new discoveries, is not Eureka! (I found it!) but rather, "hmm.... that's funny...." - Isaac Asimov

Fact - The Eiffel Tower in Paris is 320.755 metres (1052 feet) high, including the television antennas, and it contains 2 500 000 rivets and contains 18 038 metal pieces.