The Agilent/Keysight 85320B is a reference mixer module that downconverts microwave signals to 20 MHz intermediate frequency for use in distributed frequency converter systems and network analyzer applications. It enables accurate characterization and systematic error correction in RF and microwave measurements by operating in conjunction with Agilent/Keysight 85309A/B LO/IF distribution units and associated test equipment.
Technical Specifications
The 85320B is available in three distinct configurations. The standard model operates from 2 GHz to 26.5 GHz across fundamental mode (2–18 GHz) and third harmonic mode (6–26.5 GHz). The H20 option covers 0.1 GHz to 3.0 GHz and integrates with HP 85309A/B H20 and H21 distribution units. The H50 option extends operation to 50 GHz maximum.
Connector types vary by configuration. Standard units feature Type-N female connectors on all ports except the RF input (3.5 mm male). The H20 option uses Type-N female connectors on all four ports.
Physical dimensions differ across variants: standard 85320B measures 92 mm (W) × 185 mm (H) × 25 mm (D) and weighs 840 g; the H20 variant is 97 mm (W) × 122 mm (L) × 34 mm (H) and weighs 1 kg.
– Key Features
• Fundamental mode operation delivers lowest conversion loss and best sensitivity from 2–18 GHz
• Third harmonic mode extends RF signal measurement capability to 26.5 GHz
• Dual-mode architecture accommodates both low-noise and extended-range applications
• Compatible with single-cable LO/IF transmission through diplexer circuits—advantageous for rotary joint applications
– Electrical Characteristics
Maximum input specifications: 10 V DC at input ports; +26 dBm RF/LO damage level (standard); +20 dBm maximum input power (H20 configuration).
– Environmental & Operational Ratings
Operating temperature range: 0 °C to +55 °C. Non-operating storage: -40 °C to +75 °C at 5–90% relative humidity (non-condensing).
– Compatibility & Integration
The 85320B pairs with Agilent/Keysight 85309A/B distributed frequency converters for RF-to-IF downconversion. Compatible receivers include the Agilent 8510 and 8530; compatible network analyzers include the N5222A.
