The Keysight 8494G is a programmable step attenuator delivering precise, repeatable signal attenuation across DC to 4 GHz. Engineered for automated test equipment, signal simulation, and calibration systems, this 50 ohm device provides 0 to 11 dB attenuation in 1 dB increments with exceptional cycle life and switching reliability.
Technical Specifications
• Frequency Range: DC to 4 GHz
• Impedance: 50 ohm
• Attenuation Range: 0 dB to 11 dB
• Attenuation Steps: 1 dB increments
• Attenuation Accuracy: ±0.2 dB typical at 1 dB attenuation (DC to 4 GHz)
• Attenuation Repeatability: ±0.03 dB maximum after 5 million cycles per section
• Insertion Loss at 0 dB: 0.6 dB + 0.09 dB/GHz
• Maximum SWR: 1.5
• Maximum RF Input Power: 1 W average, 100 W peak
• Switching Speed: 20 milliseconds maximum (including contact settling)
• Operating Temperature: 0 to +55 °C
• Storage Temperature: –40 to +75 °C
• Dimensions: 159 mm × 73 mm × 43 mm
• Weight: 454 g
– Key Features
• Life expectancy exceeds 5 million cycles per section with minimal attenuation drift
• Discrete 1 dB steps enable precise automated control without intermediate states
• Broad frequency coverage from DC to 4 GHz supports wideband test scenarios
• Low insertion loss (0.6 dB baseline) minimizes measurement errors
• 20 millisecond switching speed accommodates high-speed test sequences
– Typical Applications
• Automated test equipment (ATE) for RF/microwave component verification
• Signal level simulation and dynamic range testing
• Calibration systems requiring traceable attenuation standards
• Production environments demanding high-cycle reliability
– Compatibility & Integration
• RF Connectors: Type-N female, SMA female, or APC-7 options
• Programming Interface: 12-pin Viking, 14-pin DIP, or 16-inch ribbon cable with 14-pin DAP plug
• Supply Voltage: 20 to 30 VDC (24 VDC typical, 125 mA at 24V)
