The NanoVNA made network analyzers cheap enough for almost everyone. Now you can get a $49 spectrum analyzer to go with it. Is it worth it? Watch [IMSAI Guy]’s video after the break for his opinion.

[kc9umr] has a way of turning these devices into capable spectrum analyzers. The spectrum analyzer feature is a crucial component of cable modems to help take advantage of the wide piece of ...

After the signal is detected, it is passed through a narrow-band video filter to clean up the display. The LO is a very important part of the spectrum analyzer. The frequency stability and phase noise ...

uses a large number of fixed filters to implement a spectrum analyzer. Another approach is to use one filter, but to make it tunable over the frequency range of interest (Figure 5-1). Since this ...