Agilent/Keysight 4352A

The Agilent/Keysight 4352A is a spectrum analyzer engineered for frequency-domain signal analysis and VCO/PLL characterization. Operating across 10 Hz to 3 GHz, it functions in dual modes

Signal Analyzer for laboratory design evaluation and VCO Tester for production-line high-speed measurements. The instrument is the core component of the 4352S test system, delivering phase noise measurements to -157 dBc/Hz at 1 MHz offset with 801 measurement points spanning 100 Hz to 10 MHz offset in 7.4 seconds per sweep.

Technical Specifications

• Frequency Range: 10 Hz to 3 GHz


• Phase Noise Performance: -157 dBc/Hz typical at 1 MHz offset


• Frequency Transient Resolution: 50 Hz


• Frequency Transient Time Resolution: 12.5 microseconds


• Measurement Points: 801 points from 100 Hz to 10 MHz offset


• Measurement Sweep Time: 7.4 seconds per 801-point sweep


• Internal DC Power Supplies: Ultra-low noise architecture

Key Features

• Dual operating modes

Signal Analyzer and VCO Tester - for design and production environments

Carrier lock multi-mode PLL technology enables automatic carrier locking during phase noise measurements

Dedicated firmware optimized for VCO and PLL parameter evaluation

Provides and controls all test signals: DC control voltage, DC power supply, and 1 kHz modulation

Comprehensive measurement suite: RF power, frequency, phase noise, frequency transient, spectrum, DC power consumption current, and FM deviation

Typical Applications

• Local oscillator evaluation in RF wireless communications equipment


• Voltage-Controlled Oscillator (VCO) characterization


• Phase-Locked Loop (PLL) testing and validation


• Production-line VCO/PLL parameter screening

Compatibility & Integration The 4352A integrates with a low-noise signal generator to form the complete 4352S test system. Frequency range extends to 26 GHz with the HP 71707A Microwave Downconverter option.