E4440-60185 Keysight

Functions

Generates precise microwave and radio frequency signals for synthesizer-based test and measurement systems; integrates with modular test hardware via internal communications and power interfaces; supports frequency synthesis across a wide spectrum with low phase noise and high stability; commonly utilized in signal generation, calibration, and communication system testing applications.

Platforms

Operates within spectrum analyzer and signal generator test equipment requiring precise frequency synthesis and phase-locked loop control. Interfaces through high-frequency coaxial connections and digital control buses to main processing units. Provides stable reference signals and local oscillator functions for RF measurement instruments operating across microwave frequency ranges. Connects via internal backplane architectures and external trigger inputs for synchronized multi-instrument test configurations.

Applications

Synthesizer assembly designed for use in high-performance PSA series spectrum analyzers operating from low MHz to multi-GHz frequencies, providing stable local oscillator signals and sampling oscillator functions essential for accurate frequency generation and signal mixing. Integrates into hardware platforms such as the E4440x series analyzers, interfacing with RF front-ends, mixers, and digital IF assemblies to enable precise frequency analysis, demodulation, and phase noise measurements. Common applications include RF and microwave signal characterization, wireless communication testing, and radar system diagnostics.

Accessories

Requires mainframe or chassis compatible with E4440A series (e.g., Keysight E4400A Series mainframe). Interfaces include rear panel multi-pin connector for internal signal and power interfacing, with specific connections to synthesizer control and RF output lines. No user-serviceable external connectors; designed for integration within E4440A spectrum analyzer mainframe.

Interfaces

10 MHz reference input BNC connector, 10 MHz reference output BNC connector, RF output N-type connector (50 ohm), GPIB IEEE-488.2 interface 24-pin connector, RS-232 serial interface 9-pin D-sub connector, LAN Ethernet RJ-45 connector, external trigger input BNC connector, modulation input BNC connectors for AM/FM, pulse modulation input BNC connector, +28V DC power input connector

Specifications

High-performance frequency synthesizer module providing ultra-low phase noise local oscillator signals for spectrum analyzer RF and IF conversion stages. Generates precise reference frequencies from 3 GHz to 26.5 GHz with sub-Hz resolution and fast switching speeds. Features YIG-tuned oscillators, phase-locked loop circuitry, and temperature-compensated crystal oscillator for exceptional frequency stability. Interfaces with analyzer mainframe via proprietary digital control bus and coaxial RF connections. Supplies multiple synthesized outputs for first and second LO mixing, enabling wide frequency coverage and image rejection. Critical component for PSA series spectrum analyzers requiring superior phase noise performance for close-in spurious measurements and narrow resolution bandwidth analysis.

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