Posts From December, 2010

What is VSWR? 

Posted by leopedrini Tuesday, December 14, 2010 9:37:00 AM Categories: Course
Everyone has heard at least. Many knows that a bad VSWR affects the performance of the Network. But what about you: do you know what it means, and why we need to know how to use these measures? // Today we'll try to see a very simple way what is VSWR. VSWR To understand what is VSWR, we need to talk a little bit about signal propagation in radio frequency systems. Simply put, the radio frequency signals are driven by electric cables between transmitters /... read more

What is 0 dBm? 

Posted by leopedrini Friday, December 03, 2010 9:33:00 AM Categories: Course
Everyone who works with Telecom knows there is a relationship between Watts and dBm. But if the Power is expressed in Watts, why we must know - and use - this relationship in our day-to-day?? // Let's try to understand today in a simple manner, and discover why the use of decibels help us much. Watt (W) and miliWatt (mW) First of all, to understand what it means for example 0 dBm, we at least have to know the basic unit of power, the Watt. By definition, 1 Watt means ... read more