The HP 3562A is a legacy, laboratory‑grade, two‑channel FFT‑based dynamic signal analyzer covering roughly 64 µHz to 100 kHz, with 2048‑point time records, extensive analysis modes (swept‑sine, noise, demodulation, curve fitting), an internal stimulus source, and HP‑IB programmability — designed for precision spectrum, network, and transient measurements. 

Technical overview

Core identity and intended use

Model: HP 3562A Dynamic Signal Analyzer. Primary roles: spectrum analysis, frequency‑response (network) measurements, transient/time‑domain capture and post‑processing for mechanical, audio, and electronic test applications.

Key specifications (OE sheet highlights)

• Frequency range: ~64 µHz to 100 kHz. 
• Acquisition / FFT: 2048‑point time records producing an 801‑line display spectrum (internal mapping/display conventions per manual).
• Channels: Two input channels with auto‑ranging and selectable input conditioning. 
• Internal source: built‑in stimulus (swept sine, fixed sine, random noise, burst modes) for network and swept‑sine measurements. 
• Amplitude accuracy / dynamic range: published amplitude accuracy on some listings/spec summaries near ±0.15 dB and dynamic range often quoted in the tens of dB to ~80 dB depending on averaging and settings; final performance depends on calibration and front‑end condition. 

Analysis and software features

Built‑in analysis includes vector averaging, waveform math, zoomed FFT, AM/FM/PM demodulation, curve fitting (multi‑pole/zero fitting), spectral maps and marker functions, and HP‑IB (GPIB) remote control for automated data capture and transfer. The operating manual documents menus, measurement sequences, and recommended test setups.