Rohde and Schwarz ESH Test Receiver

The Rohde & Schwarz ESH is a multifunction test receiver engineered for field strength measurement, selective RF analysis, and automated test system integration. It demodulates AM, double sideband, single-sideband, pulse modulated, and FM signals while detecting interference across its operating band. The instrument delivers average, peak, and quasi-peak indications traceable to CISPR16 and VDE0876 standards, with programmable measurement times for time-dependent signal characterization.

Technical Specifications

• Frequency range: 9 kHz to 30 MHz


• Sensitivity: −30 dBµV to +137 dBµV


• IF bandwidths: 0.2 kHz, 0.5 kHz, 2.4 kHz, 10 kHz (four selectable)


• Attenuator range: 110 dB


• Gain measurement range: 57 dB


• IF output: 75 MHz broadband for panoramic display or spectrum analyzer connection


• Measurement modes: Low-noise or low-distortion operation


• Modulation analysis: Frequency offset, frequency deviation, modulation depth


• Automatic linearity testing distinguishes device nonlinearity from test item nonlinearity ESH3-Z6 Single-Line V-Network


• Frequency range: 100 kHz to 200 MHz


• Simulated impedance: 5 µH || 50 Ω


• Continuous current: Up to 100 A


• Surge current: Up to 500 A (maximum 30 seconds)


• Standards: CISPR 25/EN 55025, DEF-STAN 59-411, DO-160; alternative for MIL-STD-461 on specified platforms


• Construction: Air-core inductors with screw terminals and protective plastic covers ESH3-Z5 Two-Line V-Network (LISN)


• Frequency range: 9 kHz to 30 MHz


• Load impedance: 50 µH + 5 Ω shunted by 50 Ω


• Continuous current: 2 × 10 A


• Maximum short-time current: 2 × 16 A (30 minutes)


• Maximum AC supply: 250 V rms at 63 Hz


• Standards: VDE0876, CISPR16-1


• Features artificial hand and PE network simulation

Key Features

• Excellent receiver selectivity for accurate measurement amid large level differences and multiple simultaneous signals


• Digital level indication with selectable units


• Air-core inductor construction in coupling networks for low-impedance connections


• Broadband IF output for external panoramic display integration

Typical Applications

• EMC pre-compliance and radiated/conducted emissions testing


• Disturbance voltage measurement in automotive and aerospace power supplies


• AC-powered load interference characterization


• Signal demodulation and modulation parameter extraction

Compatibility & Integration The ESH3 integrates with the Spectrum Monitor EZM for panoramic display operation and functions as a system unit within automated measurement environments.