Agilent / Keysight E7404A EMC Analyzer, 30 Hz to 13.2 GHz

The Agilent/Keysight E7404A EMC Analyzer is a spectrum analyzer engineered for electromagnetic compatibility testing across 30 Hz to 13.2 GHz. It delivers peak, quasi-peak, and average detections for pre-compliance EMI measurements in development and manufacturing environments. The instrument supports radiated emissions testing with broadband antennas, conducted emissions via LISN, and near-field diagnostics using close field probes.

Technical Specifications

• 9 kHz to 13.2 GHz (30 Hz lower limit available for DC-coupled measurements) Resolution & Accuracy


• Resolution Bandwidth (RBW): 1 Hz to 3 MHz (−3 dB); 1 Hz to 300 Hz available in spans ≤ 5 MHz


• Frequency Readout Accuracy: ±(frequency indication × frequency reference error + span accuracy + 15% of RBW + 10 Hz) + 1 Hz × N³


• Frequency Reference Stability: ±1 × 10⁻⁸ (temperature); ±1 × 10⁻⁸ (settability); ±1 × 10⁻⁷/year (aging) Signal Detection


• Peak, quasi-peak, and average detectors


• Internal preamplifier with 20 dB nominal gain

Key Features

• Full spectrum analyzer functionality with frequency, amplitude, modulation, and distortion measurements


• Preprogrammed automated EMI measurements


• Dual limit line display with margin tracking


• Signal storage capacity: up to 2000 signals in internal list


• Zone feature for simultaneous broad spectrum and magnified signal viewing


• Corrections applied for antennas, cables, and amplifiers


• Color display with large viewing area


• Automatic alignment routines at power-on; manual "Align Now RF" available every 24 hours


• 5-minute warm-up period


• Built-in 3.5" disk drive


• Optional tracking generator available

Typical Applications

• Pre-compliance EMI testing during product development


• Radiated and conducted emissions measurement


• Near-field troubleshooting with diagnostic probes


• Signal analysis and frequency characterization


• Manufacturing quality assurance and problem isolation