The Agilent/Keysight 85309A is an LO/IF distribution unit that functions as a frequency downconverter, extending the measurement capabilities of the 8530A microwave receiver down to 10 MHz. It performs fundamental mixing up to 18 GHz and downconverts microwave or millimeter-wave signals to a 20 MHz IF output for receiver processing. The unit delivers excellent sensitivity and superior spurious signal rejection, making it a core component in the HP 85310A Distributed Frequency Converter system.
Technical Specifications
Frequency Downconversion
• Input signal range: extends receiver capability to 10 MHz minimum
• Fundamental mixing: up to 18 GHz
• IF output: 20 MHz
IF Channel Performance
• Small signal gain: 21 to 25 dB
Output Power by Frequency
• 0.3–1.0 GHz: 16 dBm minimum
• 0.5–1.0 GHz: 20 dBm minimum
• 1.0–6.0 GHz: 20 dBm minimum
• 6.0–9.0 GHz: 19 dBm minimum
• 9.0–18 GHz: 17 dBm minimum
• Channel tracking: ±2 dB typical across 0.3–3.0 GHz and 2.0–18 GHz
LO Input Requirements
• 0.3–3.0 GHz: 6 to 10 dBm recommended
• 2.0–18 GHz: 0 to 6 dBm recommended
Port Return Loss (0.3–18 GHz, typical)
• LO input: 9 dB
• LO output: 7 dB
• Channel-to-channel isolation: 100 dB
– Key Features
• Remote mixer placement at antenna under test
• Low-frequency operation down to 100 MHz with optional H20 low-frequency amplifier module
• Integrated LO and IF distribution for dual-channel operation
– Compatibility & Integration
Designed for use with the 8530A microwave receiver, 85320A/B mixers, and HP 85325 millimeter-wave subsystems. System cable configurations available for HP 85301B integration. The 85309A is now obsolete (final order date May 31, 2013); replacement is the 85309B.
