The HP/Agilent 84907K is a programmable step attenuator for RF and microwave applications requiring precise signal level control from DC to 26.5 GHz. It delivers 0 to 70 dB of attenuation in 10 dB discrete steps with insertion loss below 2 dB at 26.5 GHz and repeatability better than 0.03 dB. Built on thin-film tantalum nitride on sapphire substrates, the 84907K provides high accuracy and low SWR across its operating range. Its compact form factor—35% smaller than the 8495/7 family—enables straightforward integration into automated test equipment, signal conditioning, and calibration setups.
## Technical Specifications
• **Frequency Range:** DC to 26.5 GHz
• **Attenuation Range:** 0 to 70 dB in 10 dB steps
• **Insertion Loss:** Less than 2 dB at 26.5 GHz; 0.6 dB + 0.03 dB/GHz
• **SWR:** 1.25:1 (DC to 12.4 GHz); 1.5:1 (12.4 to 26.5 GHz)
• **Repeatability:** Better than 0.03 dB
• **Switching Time:** Maximum 20 milliseconds including contact settling
• **Life Cycle:** Greater than 5 million switching cycles per section
• **RF Input Power:** 1 W average; 50 W peak
• **Control Voltage:** 24 Vdc
• **RF Connectors:** 3.5 mm female (also available with 3.5 mm male/female options; compatible with SMA and 2.92 mm)
• **Programming Connector:** 10-pin DIP sockets
## Key Features
• Thin-film attenuation cards on sapphire substrate for stability and accuracy
• Step-to-step accuracy specified to 26.5 GHz
• Individual calibration data reports available with attenuation and SWR measurements
• Rugged, compact design for instrument integration
## Typical Applications
• Automated RF and microwave testing
• Signal conditioning and level adjustment
• Calibration procedures
• ATE system integration
## Compatibility & Integration
The 84907K integrates with 11713A, 11713B, or 11713C attenuator/switch drivers for GPIB-controlled automatic test systems. Calibration data option (Option 8490XX-UK6) includes measurements by Agilent automatic network analyzer.
