Rohde & Schwarz ESHS30 9KHz – 30MHz EMI Test Receiver

The Rohde & Schwarz ESHS30 is a double-conversion heterodyne EMI test receiver engineered for precision electromagnetic interference measurements across 9 kHz to 30 MHz. Built for compliance testing and interference analysis, it delivers high sensitivity with parallel detectors for average, peak, and quasi-peak indication, supported by switchable preamplification and comprehensive preselection filtering. All functions are fully programmable via IEEE 488 (GPIB) interface.

Technical Specifications

Frequency Range: 9 kHz to 30 MHz with 10 Hz resolution and 0.0000000000001 % accuracy. Frequency drift remains below 3 × 10⁻⁶ + 30 Hz. Level Measurement: Operating range of -36 to +137 dBµV with maximum input level of +30 dBm (AC) and 7 V DC maximum. Displayed average noise spans -148 dBm minimum to -124 dBm maximum. Dynamic range is typically 70 dB or 60 dB for quasi-peak and average value indication respectively. Performance: Noise figure is typically 6 dB with preamplifier or 10 dB without. Third order intercept point: typically 20 dBm. Measurement accuracy: typically 0.5 dB error. IF bandwidth selections of 200 Hz and 10 kHz accommodate diverse measurement requirements. Power Supply: Battery or AC supply with universal auto-sensing input.

Key Features

• Switchable preamplifier with wide dynamic range


• Five fixed-tuned filters or comprehensive preselection options


• 7-digit LCD and CRT graphical display


• Built-in loudspeaker for audio monitoring


• Tracking generator for cable loss and filter attenuation measurement


• Integrated IF analyzer for interference spectrum monitoring


• Automatic measurement macros for test routines


• Self-calibration and test facilities


• Floppy disk drive for data storage


• External 10 MHz frequency reference input


• External video output capability

Typical Applications EMI/RFI compliance testing, radiated and conducted interference analysis, equipment certification per CISPR and VDE standards, frequency scanning and limit testing, transducer factor configuration.

Compatibility & Integration Compliant with CISPR 16-1, VDE 0876, ANSI C63.2, ANSI C63.4, EN 55011 to 55022, ETS, FCC, VCCI, and VDE 0871 to 0879. Full programmability via IEEE 488 interface enables integration into automated test systems.