Rohde and Schwarz ESAI Test Receiver, 9 kHz to 2.5 GHz

The Rohde & Schwarz ESAI is a dual-function EMI test receiver and spectrum analyzer engineered for electromagnetic compatibility (EMC) testing from 9 kHz to 3 GHz. It delivers full compliance with CISPR 16-1-1 standards and supports certification testing across CISPR, EN, ETS, FCC, ANSI, VCCI, and VDE requirements. The instrument combines precision test receiver selectivity with spectrum analyzer measurement speed, enabling both pre-compliance diagnostics during development and full-compliance validation in laboratory environments.

Technical Specifications

• Frequency Range: 9 kHz to 3 GHz


• Receiver Mode Bandwidths (–6 dB): 200 Hz, 9 kHz, 120 kHz, 1 MHz


• Analyzer Mode Bandwidths (–3 dB): 10 Hz to 10 MHz in 1/3/10 sequence


• Digital Filters: Approximately 40 channel filters


• Detectors: Peak, Quasi-Peak, Average, RMS, CISPR Average, CISPR RMS


• Displayed Average Noise Level (DANL): Typically –145 dBm at 10 Hz RBW; optionally –153 dBm with Preselector/Pre-amplifier B2


• Phase Noise: –113 dBc (1 Hz) at 10 kHz offset; –125 dBc (1 Hz) at 1 MHz offset


• Intermodulation-Free Range: 93 dB typical (with preamplifier); 100 dB cited for TOI point


• Preamplifier: Integrated 20 dB, switchable on/off


• Preselection: 11 filters with fixed and tuned bandwidths to 3 GHz; always active in receiver mode, switchable in analyzer mode


• Measurement Uncertainty: Typically less than 1 dB

Key Features

• Operates as both full-compliance EMI receiver and general-purpose spectrum analyzer


• CISPR bandwidths coupled to frequency range with optional disabling


• Low phase noise and wide intermodulation-free range minimize measurement artifacts


• Integrated preamplifier reduces noise figure


• Active preselection in receiver mode ensures filter selectivity

Typical Applications

• EMC pre-compliance and full-compliance measurements


• Certification testing per international and national EMI standards


• Spectral analysis and ACPR measurements in laboratory settings


• Product development diagnostic analysis

Compatibility & Integration Designed for certification compliance across CISPR, EN, ETS, FCC, ANSI, VCCI, and VDE standards. Optional Preselector/Pre-amplifier B2 extends measurement capability.