The Agilent/Keysight 3561A is a single-channel dynamic signal analyzer delivering real-time spectrum analysis across electronics, vibration, and acoustics applications. This instrument combines spectrum and network analysis with waveform recording and octave-band measurement in one integrated platform.
Technical Specifications
• Frequency Range: 0.000125 Hz to 100 kHz
• Frequency Accuracy: 0.003%
• Amplitude Range: +27 dBV to −51 dBV
• Dynamic Range: 80 dB
• Amplitude Accuracy: ±0.15 dB
• Resolution Bandwidth: Down to 640 µHz
• Display: CRT monochrome
– Key Features
Spectrum, network, and waveform analysis modes. Octave-band measurements include 1/3 and 1/1 octave analysis with selectable zoom for fine-resolution band examination. Magnitude, phase, and time displays support narrow-band, 1/3 octave, and full octave output formats.
3D spectral mapping displays up to 60 successive spectra for transient and dynamic signal monitoring. Harmonic analysis with automatic THD computation in percent or dB. Band markers measure RMS band level and average band power. Sideband markers compute modulation sideband frequency spacing and power.
Signal processing includes RMS averaging, RMS exponential weighting averaging, and time averaging. Full alias protection ensures measurement integrity across the operating frequency range.
Internal non-volatile memory stores 2 traces and 6 states. Optional extended non-volatile memory accommodates 127 measurements.
– Typical Applications
• Noise and Vibration Analysis: Machine diagnostics and mechanical system characterization
• Acoustic Testing: A-weighted filtering with octave-band support for acoustic measurements
• Electronic Signal Analysis: Precise spectral analysis for circuit and system validation
• Machine Monitoring: 3D spectral mapping and dynamic signal tracking for condition assessment
– Compatibility & Integration
IEEE 488.2 (GPIB) enables remote instrument control and data integration in automated test environments. Note: This product is obsolete.
