Rohde & Schwarz ESW26 EMI Test Receiver, 1Hz to 26.5GHz

The Rohde & Schwarz ESW26 is a precision EMI test receiver designed for electromagnetic compatibility compliance measurements from 1 Hz to 26.5 GHz. This instrument combines exceptional dynamic range, high sensitivity, and low noise figure to detect weak EMI signals amid strong interference. The ESW26 executes automated compliance testing to CISPR, FCC, and MIL-STD standards while delivering real-time spectrum analysis, time domain analysis, and interference identification.

Its selectable resolution bandwidth (1 Hz to 1 MHz) and video bandwidth (1 Hz to 10 MHz) enable precise signal characterization across demanding industrial and aerospace applications.

Technical Specifications

• Frequency Range: 1 Hz to 26.5 GHz


• Measurement Bandwidth: Up to 250 MHz


• Resolution Bandwidth (RBW): 1 Hz to 1 MHz (1-3-10 steps)


• Video Bandwidth (VBW): 1 Hz to 10 MHz (1-3-10 steps)


• RF Input: Type N connector, 50 Ohm impedance


• Power Supply: 100 V to 240 V AC, 50/60 Hz

Key Features

• Pre-selector filter rejects out-of-band signals for improved measurement accuracy


• Fast sweep speed enables efficient signal acquisition during transient events


• Automated test sequences support standardized compliance procedures with user-defined routines


• High-resolution color display visualizes measurement data clearly


• Customizable reporting templates generate compliance summaries and spectrum plots

Measurement Capabilities

• EMI compliance testing per CISPR, FCC, and MIL-STD standards


• Real-time spectrum analysis for transient and intermittent signal observation


• Time domain analysis and signal characterization functions


• Interference detection and identification

Compatibility & Integration

• Ethernet (RJ45) for remote control and data transfer


• USB ports for external storage and peripheral connection


• GPIB (IEEE 488.2) for legacy instrument integration


• External trigger input for measurement synchronization