Agilent/Keysight 85044B

The Agilent/Keysight 85044B is a 75-ohm transmission/reflection test set that extends the measurement capability of compatible network analyzers to characterize two-port devices with simultaneous reflection and transmission data capture. Operating from 300 kHz to 2 GHz, it connects directly to Agilent 8753A/B/C and Keysight 8753D Option 011 analyzers via Type-N female connectors, providing a dedicated pathway for S-parameter measurements on passive and active components.

– Technical Specifications

• Impedance: 75 Ohms
• Frequency Range: 300 kHz to 2 GHz
• Test Port Connector: Type-N (female)
• Internal Attenuator: 0 to 70 dB in 10 dB steps (manual control)
• Bias Circuitry: Integrated support for active device biasing
• Net Weight: 1.7 kg (3.8 lb)
• Shipping Weight: 2.0 kg (4.4 lb)

– Key Features

• Manual attenuator control provides flexible signal level adjustment across 0 to 70 dB range
• Bias circuitry built in for testing active semiconductor devices without external bias networks
• Compact bench footprint with cable connections for rack-mounted analyzer integration
• ESD-sensitive microcircuits require electrostatic discharge precautions during handling and installation

– Typical Applications

• Characterization of passive two-port networks in the 75-ohm environment
• Active device testing including amplifiers and filters requiring biasing support
• Transmission and reflection measurements on coaxial-based components and assemblies
• Component verification across the 300 kHz to 2 GHz band

– Compatibility & Integration

Network Analyzers: Agilent/Keysight 8753A, 8753B, 8753C, and 8753D Option 011

Required Accessories:
• 11851B RF Cable Kit (required for 8753D Option 011 connection)
• 11852B 50 to 75 ohm minimum loss pad

Reverse-direction measurements require physical rotation of the device under test. The 85044A variant provides equivalent functionality for 50-ohm systems.