The Keysight 8495H is a programmable step attenuator that delivers precise microwave signal attenuation across DC to 18 GHz. Operating in 10 dB increments from 0 to 70 dB, this unit provides repeatable attenuation performance within ±0.03 dB over 5 million cycles per section—making it ideal for automated test systems requiring deterministic behavior. The 8495H combines low insertion loss, controlled impedance matching, and fast switching to meet the demands of RF and microwave measurement applications where signal integrity and consistency are non-negotiable.
Technical Specifications
• Frequency Range: DC to 18 GHz
• Attenuation Range: 0 to 70 dB in 10 dB steps
• Insertion Loss: 0.4 dB + 0.07 dB/GHz (at 0 dB)
• Maximum SWR: 1.35 (DC–8 GHz), 1.5 (8–12.4 GHz), 1.7 (12.4–18 GHz)
• Maximum RF Input Power: 1 W average, 100 W peak
• Attenuation Repeatability: ±0.03 dB maximum over 5 million cycles per section
• Switching Time: Maximum 20 ms including settling
• Operational Life: >5 million cycles per section
• Impedance: 50 Ω
• Coil Voltage: 20–30 Vdc
• Switching Current: Approximately 125 mA at 24 Vdc
• Dimensions: 130 × 73 × 43 mm (5.125 × 2.875 × 1.6875 in)
• Weight: 340 g (12 oz)
• Operating Temperature: 0 °C to +55 °C
• Operating Humidity: <95% relative
• Altitude Limit: <4600 m (15,000 ft)
– Key Features
• RF connectors available in Type-N female, SMA female, or APC-7
• 12-pin Viking programming connector with optional 14-pin DIP variant
• Five-foot solenoid cable with mating plug assembly
• Exceptional attenuation repeatability of typically 0.01 dB
• Option UK6 provides NIST-traceable calibration data for SWR and attenuation
– Typical Applications
• Component characterization and receiver sensitivity testing
• Radar and antenna measurement systems
• Automated RF test and measurement setups
• Dynamic range extension in signal chain validation
– Compatibility & Integration
• Keysight 11716A/B/C interconnect kits enable series connection of multiple attenuators for extended dynamic range at 1 dB step resolution
• Compatible with Keysight 11713B/C Attenuator/Switch Drivers for integrated system configuration
