Agilent/Keysight 84905M

The Keysight 84905M is a programmable step attenuator engineered for precision signal control from DC to 50 GHz. Delivering 0 to 60 dB attenuation in 10 dB steps, this instrument provides excellent repeatability and fast switching performance for calibration labs, RF/microwave system integration, and high-frequency test applications. Its low insertion loss and controlled VSWR across the operating range minimize measurement uncertainty while supporting both average and peak power handling requirements.

– Technical Specifications

• Frequency Range: DC to 50 GHz
• Attenuation Range: 0 to 60 dB
• Attenuation Steps: 10 dB increments
• Insertion Loss (at 0 dB):
– 0.6 dB + 0.03 dB/GHz (DC to 40 GHz)
– 2.6 dB (to 50 GHz)
• Maximum VSWR:
– 1.25 (1 to 12.4 GHz)
– 1.5 (to 34 GHz)
– 1.7 (to 40 GHz)
– 2.6 (to 50 GHz)
• Repeatability: 0.03 dB typical over 5 million cycles per section
• Power Handling: 1 W average, 50 W peak RF input
• Switching Time: Less than 20 ms

– Key Features

• Six-section design with independent 10 dB attenuation per section
• RF connectors available in 2.4 mm female or male/female configurations
• 10-pin programming socket interface
• Stable performance over temperature for demanding environments

– Typical Applications

• Precision signal attenuation in RF/microwave test benches
• Calibration and verification of high-frequency measurement systems
• Aerospace and communications test platforms
• System integration requiring repeatable attenuation control

– Compatibility & Integration

The 84905M pairs with the 11713B/C attenuator/switch drivers for automated control via GPIB, USB, or LAN interfaces.