The HP/Agilent 8495B is a manual step attenuator for precision signal level control across RF and microwave frequencies. It provides 0 to 70 dB attenuation in discrete 10 dB steps, covering DC to 18 GHz with exceptional repeatability and operating life exceeding 5 million cycles per section. The attenuator uses precision thin-film cards and gold-plated leaf spring contacts, delivering attenuation repeatability of 0.03 dB maximum per section and typically 0.01 dB. A rotary knob enables manual control, making it ideal for bench measurements, system integration, and applications requiring controlled RF signal reduction.
## Technical Specifications
• **Frequency Range:** DC to 18 GHz
• **Attenuation Range:** 0 dB to 70 dB
• **Attenuation Steps:** 10 dB increments
• **Insertion Loss (at 0 dB):** 0.4 dB + 0.07 dB/GHz
• **Maximum SWR:** 1.35 (1 to 8 GHz), 1.5 (8 to 12.4 GHz), 1.7 (12.4 to 18 GHz)
• **Attenuation Repeatability:** 0.03 dB maximum per section; typically 0.01 dB; 0.03 dB after 1 million cycles
• **Maximum RF Input Power:** 1 W average; 100 W peak
• **Operating Life:** Over 5 million cycles per section
• **Impedance:** 50 ohm
## Key Features
• Manual rotary knob control
• Precision thin-film attenuator cards with lossless thru-lines
• Gold-plated leaf spring contacts for durability
• Available connectors: Type-N female, SMA female, APC-7, 3.5 mm
• NIST traceable calibration option (UK6/890) for SWR and attenuation data
## Compatibility & Integration
• Series-connectable with other 849x-series attenuators for extended dynamic range and 1 dB step resolution using Keysight 11716A/B/C interconnect kits
• Custom step attenuator and switch combinations available
• Operating and service manuals available for 8494/95/96A/B series
