Rohde & Schwarz ESU8 EMI Test Receiver

The Rohde & Schwarz ESU8 is a dual-input EMI test receiver combining CISPR 16-1-1 compliance with high-end spectrum analyzer functionality for civil and military standards validation. RF Input 1 spans 20 Hz to 8 GHz; RF Input 2 extends to 1 GHz. The instrument delivers excellent RF characteristics, wide dynamic range, and minimal phase noise with very low measurement uncertainty - critical for repeatable EMI compliance work.

Technical Specifications

Frequency Coverage & RF Performance

• RF Input 1: 20 Hz to 8 GHz


• RF Input 2: 20 Hz to 1 GHz


• 12 preselection filters from 20 Hz to 3.6 GHz (switchable; disableable in analyzer mode)


• Integrated 20 dB preamplifier (1 kHz to 3.6 GHz) standard; optional 30 dB low-noise preamplifier to 40 GHz available Resolution & Bandwidth


• Resolution Bandwidths: 10 Hz to 10 MHz in 1/2/3/5 steps


• IF Filter 3 dB bandwidths: 10 Hz to 10 MHz in 1/2/3/5 steps


• IF Filter 6 dB bandwidths: 10 Hz, 100 Hz, 200 Hz, 1 kHz, 9 kHz, 10 kHz, 100 kHz, 120 kHz, 1 MHz Detection & Measurement


• Seven detector types: Peak, Min Peak, RMS, Average, CISPR-AVG, CISPR-RMS, Quasi-Peak


• Digital detector design ensuring stability and reproducibility


• Time-domain scan with FFT option for accelerated overview measurements


• Analyzer mode sweep time minimum 2.5 ms


• Time-domain analysis with 10 µs resolution; monitoring time >2 h


• Frequency scan supporting three parallel detectors (up to 2 million test points/trace)


• Time-domain measurements: up to 2 million test points, ≥10 µs/point Operational Modes


• Receiver mode with parallel real-time IF analysis


• Fully and partially automatic measurements (preview, data reduction, final measurement)

Key Features

• Dual-input architecture optimized for swept and broadband EMI testing


• Internal complex preselection minimizes out-of-band interference


• High measurement speeds via FFT-based time-domain capture


• Wide detector selection meets CISPR and MIL-STD requirements

Compatibility & Integration

• GPIB, LAN (Ethernet), and USB interfaces


• Remote control via GPIB or LAN


• LabView, LabWindows/CVI, VXI Plug & Play driver support


• Remote Desktop capable