The Keysight/Agilent/HP 3582A is a dual-channel spectrum analyzer for real-time signal analysis from 0.02 Hz to 25.5 kHz. It combines LSI digital filtering with FFT processing to deliver precise frequency, amplitude, and phase measurements across bench and system-level applications. The instrument captures transients as short as a few milliseconds and provides zoom analysis for detailed inspection of selected frequency bands.
Technical Specifications
Frequency Domain
• Range: 0.02 Hz to 25.599 kHz
• Spans: 1 Hz to 25 kHz (selectable 1-2.5-5-10 sequence; 1 Hz and 2.5 Hz spans operate in 0-start mode only)
• Center frequency adjustment: 5 Hz to 25 kHz spans positionable anywhere within range in 1 Hz increments
• Resolution: 0.4% of span (single-channel), 0.8% of span (dual-channel), down to 20 mHz across full range
• Transfer function resolution: 40 mHz
• Frequency accuracy: ±0.003% of display center frequency
Amplitude Domain
• Input range: +30 dBV (31.6 V) to −120 dBV (1 µV)
• Overload protection: 100 V maximum
• Dynamic range: 70 dB
• Amplitude accuracy: ±0 dB to −0.1 dB (passband center), ±0 dB to −1.5 dB or −4.0 dB (filter-dependent)
• Log display: +160 dB to −80 dB full scale; 0.1 dB resolution
• Linear display: 4 × 10 full scale to 4 × 10% full scale; 3-digit resolution
Phase Domain
• Range: +200° to −200°
• Accuracy: ±10°
• Resolution: 1.9°
– Key Features
• Simultaneous dual-channel analysis for linear and non-linear network characterization
• Transfer function and coherence function measurement
• Direct phase spectrum measurement
• Internal signal sources: periodic pseudorandom noise, band-limited white noise, band-limited and band-translated noise
• Tracking generator capability for low-frequency network analysis
• Input impedance: 1 MΩ ±5% shunted by <60 pF
• Floating input low for isolation
– Typical Applications
Transient analysis, frequency response characterization, network testing, vibration analysis, and low-frequency signal measurement where resolution and sensitivity dominate conventional baseband techniques.
