These problems can be corrected, though, with a little bit of cunning from Ted: Ted’s Rigol spectrum analyzer consists of two basic parts. The tracking generator generates a signal, which is fed ...

because it can display the signals over a range of frequencies. For example, whereas an oscilloscope would show total noise level, a spectrum analyzer would show the noise as related to frequency.

With all the pleasantries dispensed, I turned to the one task pretty much every ham will want to turn a spectrum analyzer on: finding out just how bad the signal from a cheap handy talkie is.

Yokogawa Test & Measurement's AQ6377E optical spectrum analyzer offers fast, precision mid-wave infrared (MWIR) measurements ...