The Agilent/Keysight 8591EM is a portable EMI analyzer that combines spectrum analyzer and EMI receiver functionality for pre-compliance testing and electromagnetic interference diagnostics. Built on the Agilent 8590 E-series platform, this stand-alone instrument automates EMC precompliance measurements without requiring external computers or software. It measures and stores up to 239 signals across specified frequency ranges, applies limit-line comparisons against two regulatory standards plus user-defined margins, and executes predefined CISPR band routines with correct video and resolution bandwidths.
Technical Specifications
Frequency Performance
• Frequency range: 9 kHz to 1.8 GHz
• DC-coupled operation: 9 kHz to 1.8 GHz
• AC-coupled operation: 1 MHz to 1.8 GHz
• Frequency sweep time: 20 µs to 100 s (span 0 Hz, >1 kHz)
• Standard frequency accuracy: 7.5 ppm; optional precision reference improves to 1 × 10⁻⁸
• Frequency stability with precision reference: 1 × 10⁻⁸
Amplitude Characteristics
• Displayed average noise level: approximately -115 dBm (–115 to –113 dBm)
• Amplitude range: -115 dBm to +137 dBµV
• Maximum safe input: +30 dBm average continuous (attenuator ≥10 dB), +30 dBm peak pulse, 25 Vdc
• Reference level range: -115 to +30 dBm (50 Ω)
• Calibrated amplitude range: +30 to +130 dBm (with Option 130)
• Calibrated on-screen display: 70 dB dynamic range
Resolution and Bandwidth
• Resolution bandwidths: 1 kHz to 3 MHz standard; optional 30 Hz to 3 MHz (1, 3, 10 sequence)
• EMI bandwidths: 200 Hz, 9 kHz, 120 kHz, 1 MHz (6 dB); narrow bandwidths (30, 100, 200 EMI, 300 Hz) available on optional circuit card
• Video bandwidth: 1 Hz to 1 MHz (1, 3, 10 sequence)
• RBW switching uncertainty: ±0.4 dB (3 kHz to 3 MHz); ±0.5 dB (1 kHz)
– Key Features
• Dual-mode operation: EMI analysis and spectrum analysis
• Automated signal detection and documentation up to 239 signals per measurement session
• Dual limit-line display for regulatory compliance comparison
• CISPR band setup automation with integrated bandwidth correction
• Amplitude correction built-in
• Supports products with clock frequencies to 108 MHz
– Typical Applications
• EMC pre-compliance testing
• Diagnostic EMI measurements
• Radiated and conducted emissions screening
• Product development and troubleshooting
– Compatibility & Integration
The 8591EM operates as a fully autonomous platform, eliminating dependency on external software or host computers for automated EMI workflows.
