Rohde & Schwarz ESL6 EMI Test Receiver

The Rohde & Schwarz ESL6 is a dedicated EMI test receiver and spectrum analyzer engineered for electromagnetic compliance testing and field diagnostics across 9 kHz to 6 GHz. It combines precision frequency measurement, CISPR-compliant detection modes, and automated test sequencing to streamline certification workflows in development labs and third-party test facilities.

Technical Specifications

• Operating range: 9 kHz to 6 GHz


• Frequency resolution: 1 Hz


• Frequency span: 0 Hz, 10 Hz to 3/6 GHz (span uncertainty: 3%)


• Marker resolution and tuning: 1 Hz resolution; default step size = span / 500 Reference Frequency Stability


• Standard configuration: ±1 × 10⁻⁶ aging per year; ±1 × 10⁻⁶ temperature drift (5 °C to 45 °C); ±5 × 10⁻⁷ max. initial calibration accuracy


• With R&S FSL-B4 OCXO option: ±1 × 10⁻⁷ aging per year; ±1 × 10⁻⁷ temperature drift; ±5 × 10⁻⁸ max. initial calibration accuracy Spectral Purity (at 500 MHz)


• SSB phase noise: –95 dBc (1 Hz) at 1 kHz offset; <–98 dBc typ. –103 dBc (1 Hz) at 10 kHz offset; <–98 dBc (1 Hz) at 100 kHz offset Amplitude Performance


• Measurement accuracy: 0.5 dB up to 3 GHz


• 1 dB compression point: +5 dBm


• RF input pulse resistance: 10 mWs


• Displayed average noise level: typ. –162 dBm; 25 dB


• Trace capacity: up to 1 million measurement points per trace; six traces active in parallel


• Integrated spectrum analyzer functions: channel power, adjacent channel power, occupied bandwidth, intermodulation, noise figure


• Automated test sequences with tabular SCAN configuration


• Large bargraph display with MAX HOLD function


• Predefined antenna factors and limit lines per commercial standards


• TUNE TO MARKER and MARKER TRACK monitoring

Typical Applications

• EMI/RFI compliance testing and precompliance screening


• Radiated and conducted emissions characterization


• Spectrum occupancy and interference analysis


• Signal identification and disturbance monitoring

Compatibility & Integration All spectrum analyzer functions of the R&S FSL3/R&S FSL6 platform are included.