HP / Agilent 3582A Spectrum Analyzer

The HP/Agilent 3582A is a dual-channel, real-time spectrum analyzer engineered for precision signal analysis across audio and baseband frequencies from 0.02 Hz to 25.599 kHz. Built on LSI digital filtering and FFT processing, it delivers resolution as fine as 20 milliHertz for spectrum analysis and 40 milliHertz for transfer functions – up to 5000:1 improvement over conventional baseband analysis. The instrument captures transients in millisecond intervals and supports zoom analysis for detailed examination of selected frequency bands. ## Technical Specifications **Frequency Range & Resolution**
• 0.02 Hz to 25.599 kHz with band-selectable analysis
• Spans: 1 Hz to 25 kHz in 1-2.5-5-10 sequence; 5 Hz to 25 kHz adjustable in 1 Hz increments
• Resolution: 0.4% of span (single channel), 0.8% of span (dual channel)
• Spectrum resolution: 20 milliHertz minimum; transfer function: 40 milliHertz
• Center frequency accuracy: ±0.003% of display center frequency
• Dynamic range: 70 dB **Input Specifications**
• Voltage range: +30 dBv (31.6 V) to -120 dBv (1 μV)
• Overload protection: 100 V maximum
• Input impedance: 10 Ω ±5% shunted by <60 pF
• AC/DC coupling selectable; low-frequency 3 dB roll-off 58 dB
• Floating input low: up to 30 V **Display**
• Alphanumeric CRT with annotation and marker readout
• Vertical scales: linear (0 V base) and logarithmic (10 dB/DIV, 80 dB maximum range) ## Key Features • Dual-channel real-time measurement capability
• Transfer function magnitude and phase analysis
• Coherence and phase spectrum measurement
• Transient capture and frequency domain conversion
• Internal periodic and random noise sources
• Zoom functionality for enhanced resolution on specific bands
• Linear and non-linear network characterization ## Typical Applications Low-frequency signal characterization, transfer function analysis, network testing, transient measurement, and precision audio-range spectral analysis.