We have a monster 3 GHz Aeroflex spectrum analyzer. It's heavy, confusing, annoying, and buggy, and useless for low frequency work. (It has nasty spurs at +-60 Hz, too.)
I've seen ads for cute little handhelds, and would appreciate recommendations. It would be great to go to low frequencies, a couple KHz or even lower.
I was just trying to measure the -3 dB point of a bandlimited noise generator, expected to be around 10 KHz. An oscilloscope FFT is, well, too noisy to resolve the corner frequency. I'd need something that can sweep really slow, with a low resolution bandwidth.