HP / Agilent 8494G Programmable Attenuator, 4 GHz, 11 dB, 1 dB steps

The HP/Agilent 8494G is a programmable attenuator delivering precise signal level control across DC to 4 GHz in 1 dB discrete steps. With an attenuation range of 0 to 11 dB and repeatability of ±0.03 dB maximum over 5 million cycles per section, it meets the demands of automated test systems and RF signal conditioning applications. The unit features 50 ohm impedance, 1.50 maximum SWR, and handles average RF input power to 1 W with peak capability to 100 W. Gold-plated leaf springs ensure extended operational life and consistent attenuation performance. Switching time is 20 ms including contact settling. The attenuator accepts multiple RF connector configurations (Type-N female, SMA female, or APC-7) and programming interfaces (12-pin Viking or optional 14-pin DIP). Integration with Keysight 11713B/C drivers and 11716A/B/C interconnect kits enables series cascading for expanded dynamic range. NIST traceable calibration data available via Option UK6.

– Technical Specifications

• Frequency Range: DC to 4 GHz
• Attenuation Range: 0 to 11 dB in 1 dB steps
• Insertion Loss (0 dB): 0.6 dB + 0.09 dB/GHz (0.96 dB)
• Maximum SWR: 1.50
• Maximum RF Input Power: 1 W average; 100 W peak
• Impedance: 50 ohm
• Attenuation Repeatability: ±0.03 dB maximum over 5 million cycles per section
• Maximum Switching Time: 20 ms (including contact settling)
• Operating Life: Over 5 million cycles per section
• Solenoid Drive Voltage: 20 V to 30 V
• Switching Current: Approximately 125 mA at 24 Vdc per section
• Weight: 2 lb

– Key Features

• Discrete 1 dB attenuation steps for precise signal control
• Gold-plated leaf springs for reliability and repeatability
• Multiple RF connector options: Type-N female, SMA female, APC-7
• Flexible programming interfaces: 12-pin Viking or 14-pin DIP
• Solenoid-driven actuation with 20 ms switching time
• NIST traceable calibration available

– Typical Applications

• Automated RF and microwave test systems
• Signal conditioning and leveling
• Power control in test instrumentation
• Systems requiring cascaded attenuation for extended dynamic range

– Compatibility & Integration

• Controlled via Keysight 11713B/C Attenuator/Switch Drivers
• Series connection supported using Keysight 11716A/B/C interconnect kits
• Cascading increases overall dynamic range