HP 3561A

The 3561A Dynamic Signal Analyzer is a versatile, single channel, real time spectrum analyzer with applications in electronics, vibration analysis, and acoustics. It's capable of spectrum and network analysis, waveform recording, and 1/3 and 1/1 octave analysis. It also features a high accuracy of ±0.15 dB, 80 dB dynamic range and full alias protection, and band selectable zoom analysis for 640 µHz resolution. Incorporates internal non-volatile memory which will store 2 traces and 6 states.