The HP/Agilent 3561A is a single-channel dynamic signal analyzer engineered for real-time measurement across electronics, vibration, and acoustics. It delivers simultaneous time and frequency domain analysis from near DC to 100 kHz, combining spectrum analysis, network analysis, and waveform capture in one instrument. With 80 dB dynamic range and ultra-narrow resolution down to 640 µHz, the 3561A resolves weak signals buried in complex spectral environments. The 13-bit ADC samples at 256 kHz with anti-alias filtering, ensuring measurement integrity across the full bandwidth.
– Technical Specifications
• Frequency Range: 0.000125 Hz to 100 kHz
• Frequency Spans: 0.01024 Hz to 100 kHz in 1, 2, 2.5, 5, 10 sequence
• Frequency Accuracy: ±0.003% of display center frequency
• Resolution Bandwidth: 640 µHz minimum; band-selectable zoom analysis available
• Real-Time Rate: 7.5 kHz; single display 3.0 kHz typical, fast average 7.5 kHz; spectrum updates to 10 per second; averaging to 20 spectra per second
• Amplitude Range: +27 dBV to −51 dBV (22.4 Vrms to 2.82 mVrms); 1 dB increments
• Dynamic Range: 80 dB; simultaneous measurement of primary and secondary signals at 0.0001× amplitude ratio
• Amplitude Accuracy: ±0.15 dB (+27 to −40 dBV); ±0.25 dB (−41 to −51 dBV); ±0.15 dB across 0–55°C operational range
• Phase Accuracy: ±2° DC–10 kHz; ±10° 10–100 kHz (signals ≤40 dB below full range)
• Input Impedance: 1 MΩ ±5%, shunted by 95 pF maximum
• Input Coupling: AC or DC; AC mode 3 dB point 100 kHz signal corruption
– Typical Applications
• Predictive maintenance and dynamic balancing
• Noise characterization and reduction
• Speech and acoustics signal processing
• Distortion and spurious product measurement
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