I'm looking for a spectrum analyzer to help me with the design of an audio DAC, specifically the design of the dc power rails and the effects of the Murata high value ceramic capacitors. Of course I'm looking for an ecconomical solution, clock speeds in my design are 100mhz, so I guess I'm looking for something that can reslove 1ghz? +/-5v to +/- 20v rails.
Second hand or new, stand alone or pc based I'm not fussed. Thanks in advance for any suggestions.