Agilent/Keysight 35670A

The Agilent/Keysight 35670A is a portable dynamic signal analyzer delivering real-time spectrum and waveform analysis across mechanical, structural, and electronic testing applications. Operating from 122 µHz to 102.4 kHz with 16-bit ADC resolution and ±0.15 dB accuracy, it combines field portability with laboratory-grade measurement capability in a compact form factor designed to fit under an airplane seat.

Technical Specifications

Measurement Capability

• Frequency range: 122 µHz to 102.4 kHz (1 channel); 51.2 kHz (2 channel); 25.6 kHz (4 channel)


• Real-time bandwidth: 25.6 kHz (1 channel)


• Resolution: 100, 200, 400, 800, and 1600 lines


• Digital zoom: Down to 61 µHz resolution


• Dynamic range: 90 dB typical; up to 130 dB in swept-sine mode


• Input impedance: ≥1 MΩ


• Source impedance: 50 Ω


• Input noise: ≤140 dBVrms/√2 Hz (above 1280 Hz); ≤130 dBVrms/√2 Hz (160 Hz to 1280 Hz)


• Channel match: ±0.04 dB and ±0.5 degrees Hardware


• 2 standard channels; optional 4-channel configuration (Option AY6)


• 17 cm (6.3 inch) color display


• 16-bit ADC


• Power: 12–28 Vdc or 90–264 Vac, 47–440 Hz


• Built-in 3.5-inch floppy disk drive


• Optional 8 MB RAM (Option UFC) for extended transient capture (0.8 to >6 Msamples)


• Optional 1 MB NVRAM (Option UFF) Measurement Modes

Standard: Linear spectrum, cross spectrum, power spectrum, power spectral density, frequency response, coherence, time waveform, auto-correlation, cross-correlation, histogram, PDF, CDF. Optional: Octave analysis (1/1, 1/3, 1/12 octave to 40 kHz), order tracking with orbit diagrams, curve fit/synthesis, swept-sine, arbitrary waveform source. Source Outputs
Random, burst random, periodic chirp, burst chirp, pink noise, sine, swept-sine (Option 1D2), arbitrary waveform (Option 1D4).

Key Features

• Dual-channel baseline with 4-channel expansion option


• Advanced marker set: individual and coupled multi-trace, peak search, harmonic, band, sideband power, waterfall, and frequency response markers


• Time-domain control system analysis: overshoot, rise time, settling time, delay measurement


• THD, harmonic power, and RPM/order tracking in real time


• Deep transient capture to >6 Msamples with optional memory

Typical Applications

• Vibration and structural analysis


• Motor and bearing diagnostics


• Acoustic and noise characterization


• Transient and shock analysis


• Field troubleshooting and predictive maintenance


• Laboratory signal characterization

Compatibility & Integration Agilent Instrument BASIC firmware (Option 1C2) enables custom automation routines and integration with external measurement systems.