The HP/Agilent 4352B is a dual-mode signal analyzer for characterizing Voltage Controlled Oscillators (VCOs) and Phase-Locked Loops (PLLs) in RF wireless applications. Operating as both a signal analyzer and VCO tester, it covers 100 MHz to 3 GHz natively, with extension to 12.6 GHz via the optional HP 43521A downconverter. The instrument delivers laboratory-grade analysis for design validation alongside production-line measurement speed.
## Technical Specifications
**Frequency Measurement**
• Measurement range: 100 MHz to 3 GHz
• Frequency span: 2 MHz, 20 MHz, MAX
• Resolution: Measurement range ÷ 40,000 Hz
• Accuracy: ±(Measurement range × 0.1% + external timebase accuracy)
• Transient resolution: 50 Hz; time resolution: 12.5 µs
**RF Power Measurement**
• Input range: −10 to +20 dBm
• Absolute accuracy: ±3 dBm @ −10 dBm, RF ATT = 10 dB (typical)
• Relative accuracy: 0.5 dB (typical)
• Input impedance: 50 Ω; VSWR <1.5 (@ <2 GHz), <1.3 (typical)
**Phase Noise Measurement**
• Performance: −157 dBc/Hz @ 1 MHz offset (typical)
• Measurement points: Up to 801 from 100 Hz to 10 MHz offset
• Sweep time: 7.4 seconds
• Carrier lock: Automatic via carrier lock multi-mode PLL technology
**Spectrum Analysis**
• FFT spectrum analyzer capability included
**FM Deviation**
• Range: 0 to 200 kHz peak
• Accuracy: ±(2% + 0.1% of measurement) @ 1 kHz FM rate
**DC Control & Power Supply**
• VCO tuning supply: 0 to +15.5 V, 50 mA max.; 1 mV resolution; ±(0.2% + 2 mV) accuracy
• Control voltage source: 0 to +20 V, 100 µV steps, 20 mA max.; ±(0.1% + 20 mV) accuracy (Option 001: −15 to +35 V)
• Control voltage noise: <1 nV/√Hz @ 10 kHz offset
**Filtering & Signal Generation**
• HP filters: 50 Hz, 300 Hz
• LP filters: 3 kHz, 15 kHz, 20 kHz
• 1 kHz signal source for VCO characterization
• Residual FM: <3 Hz rms (300 Hz – 3 kHz bandwidth)
## Key Features
• Dual measurement modes: signal analyzer and VCO tester
• Excellent phase noise characterization with automatic carrier tracking
• Integrated DC supply and ultra-low-noise control voltage source for complete VCO tuning evaluation
• High frequency resolution and transient measurement capability
• GPIB interface for automated test sequences
## Typical Applications
• VCO characterization and tuning curve generation
• PLL phase noise and transient response evaluation
• RF component validation in wireless transceiver design
• Production-line acceptance testing of oscillators
## Compatibility & Integration
• Extends to 12.6 GHz with HP 43521A downconverter option
• DC control voltage source supports Option 001 extended polarity range (−15 to +35 V)
• GPIB control for integration into automated measurement systems
