Agilent/Keysight 4352S

The Agilent/Keysight 4352S is a specialized test system for characterizing Voltage-Controlled Oscillators (VCOs) and Phase-Locked Loops (PLLs) in RF wireless communication applications. Operating in Signal Analyzer or VCO Tester modes, it delivers phase noise measurements from 100 Hz to 10 MHz offset with typical performance of −90 dBc/Hz at 100 Hz, −137 dBc/Hz at 10 kHz, and −157 dBc/Hz at 1 MHz. The system executes complete phase noise sweeps across 801 points in 7.4 seconds using carrier lock multi-mode PLL technology for automatic carrier acquisition.

Technical Specifications

• Standard configuration: 10 MHz to 3 GHz


• With Agilent 43521A downconverter: 10 MHz to 12.6 GHz


• Spectrum measurement span: 10 MHz maximum Phase Noise


• Offset range: 100 Hz to 10 MHz


• Measurement speed: 7.4 seconds per 801-point sweep


• Employs carrier lock multi-mode PLL technology RF Power Measurement


• Standard range: −10 dBm to +20 dBm


• With 43521A (2.4 GHz to 12.6 GHz): −20 dBm to +20 dBm


• Resolution: 0.01 dB Frequency Measurement


• Resolution: 1 kHz


• Accuracy: ±(measurement range × 0.1% + external time base accuracy) Frequency Transient Analysis


• Resolution: 50 Hz minimum


• Sampling interval: 12.5 µseconds


• Evaluates PLL lock-up time and VCO post-tuning drift Additional Measurements


• FM Deviation: 0 to 200 kHz


• DC Power Current: 0 to 50 mA

Source Characteristics DC Power Supply

• Output voltage: 0 to +15.5 V @ 50 mA max


• Resolution: 1 mV


• Accuracy: ±(0.2% + 2 mV) DC Control Voltage


• Standard range: 0 to 20 V @ 20 mA max


• Option 001 range: −15 to 35 V


• Resolution: 100 µV 1 kHz Signal Source


• Output range: 0 to 1 Vrms


• Resolution: 1 mVrms

Typical Applications Local oscillator design verification; VCO frequency stability and noise characterization; PLL transient response and lock-up time evaluation; spurious and harmonic detection; frequency drift assessment during thermal and operational transients.

Compatibility & Integration The 4352S integrates the 4352B VCO/PLL Signal Analyzer with a compatible low-noise signal generator controlled via GPIB. Optional Agilent 43521A downconverter extends operating range to 12.6 GHz. Discontinuation Notice: Product and associated accessories discontinued November 1, 2004; active support ended November 1, 2009.