Agilent/Keysight 8495G

The Agilent/Keysight 8495G is a programmable step attenuator that delivers precise signal level control across DC to 4 GHz with 70 dB total attenuation range in 10 dB discrete steps. Built for high-reliability automated testing, the unit features precision gold-plated leaf springs rated for over 5 million cycles per section with typical repeatability of 0.01 dB. Maximum switching time is 20 ms, enabling rapid test sequences. Insertion loss measures 0.4 dB + 0.07 dB/GHz at 0 dB attenuation, with SWR maintained below 1.35 across the frequency range. The 8495G accepts Type-N female, SMA female, and APC-7 connectors and operates on 24 VDC solenoid drive at approximately 125 mA switching current. Optional UK6 certification provides NIST traceable SWR and attenuation data. Compact form factor (5.125 × 2.875 × 1.6875 inches, 340 g) fits standard bench and rack configurations. Compatible with HP-IB attenuator drivers and interconnect kits for cascaded applications requiring extended dynamic range.

– Technical Specifications

• Frequency Range: DC to 4 GHz
• Attenuation Range: 0 to 70 dB in 10 dB steps
• Insertion Loss (at 0 dB): 0.4 dB + 0.07 dB/GHz
• Maximum SWR: 1.35
• Repeatability (typical): 0.01 dB after 5 million cycles
• Operating Life: Over 5 million cycles per section
• Maximum RF Input Power: 1 W average, 100 W peak
• Switching Time: Maximum 20 ms (including contact settling)
• Solenoid Drive: 24 VDC, approximately 125 mA switching current
• Impedance: 50 ohm
• Dimensions: 130 mm × 73 mm × 43 mm
• Weight: 340 g

– Key Features

• Discrete 10 dB attenuation steps for precise level control
• Gold-plated leaf spring contacts ensure long operational life
• Fast switching performance supports high-speed automated test sequences
• Low SWR across full frequency range minimizes measurement uncertainty
• Multiple connector options accommodate diverse system configurations

– Typical Applications

• RF signal conditioning and dynamic range extension in test systems
• Automated power level calibration and verification
• Signal attenuation for receiver sensitivity and compression testing
• Cascaded attenuator networks requiring 70+ dB range

– Compatibility & Integration

• RF Connectors: Type-N female, SMA female, APC-7
• Programming: 12-pin Viking (standard); optional 14-pin DIP or 16-inch ribbon cable with 14-pin DAP plug
• Attenuator Drivers: HP 11713A, HP 87130A, HP 70611A via HP-IB
• Interconnect Kits: Keysight 11716A/B/C for series cascading
• Optional NIST Certification: UK6 provides traceable SWR and attenuation data