6. Spectrum analyzers: today and tomorrow

Today's spectrum analyzers can reach frequencies close to 200 GHz, and can work in real-time. Prices range from 500 euros to 90,000 euros for very high-end development devices.

Spectrum analyzers (sometimes referred to as signal analyzers, given their ability to provide not only the signal spectrum, but also other useful information) can be classified, according to their use, as follows:

• laboratory or benchtop spectrum analyzer, such as those shown in figures 48 and 49 ;

• spectrum analyzer in the form of an external...