The Keysight E8257D PSG Analog Signal Generator delivers high-performance signal synthesis across 250 kHz to 67 GHz, with operational capability to 70 GHz. Purpose-built for RF and microwave characterization, it combines exceptional phase noise, wide dynamic range, and precise frequency control to support radar, communications, and component testing. The instrument achieves 0.001 Hz frequency resolution in CW mode and maintains spectral purity through harmonic suppression to -55 dBc with optional filtering.
Technical Specifications
Frequency Performance
• Range: 250 kHz to 67 GHz (configurable band options available)
• Resolution: 0.001 Hz (CW), 0.01 Hz (sweep modes)
• Accuracy: ±0.05% of span ± timebase at 100 ms sweep time
• Internal timebase stability: <±3 × 10⁻⁸/year (Option UNR/UNX), <±2.5 × 10⁻¹⁰/day
• Temperature stability: 50 GHz)
• Temperature coefficient: 0.02 dB/°C (leveling accuracy)
• Automatic Level Control (ALC) for stabilized power delivery
Phase Noise
• SSB at 10 kHz offset from 10 GHz carrier: -115 dBc/Hz typical
• SSB at 10 MHz offset: -144 dBc/Hz
• Ultra-low noise option (UNY): -143 dBc/Hz at 1 GHz, 10 kHz offset
Spectral Purity
• Harmonic suppression: -25 dBc base, -55 dBc with optional low-pass filters
– Key Features
• Frequency resolution to 0.001 Hz enables precise carrier definition
• Reference output at 10 MHz (>+4 dBm into 50 Ω) supports external synchronization
• Modular architecture permits configuration customization and field upgrades
• Wide dynamic range supports component gain and loss characterization
– Typical Applications
• Advanced radar system component testing
• Communications transceiver validation
• Control system signal synthesis
• Phase noise-sensitive measurements
– Compatibility & Integration
External reference accepts standard 1–10 MHz inputs at 50 Ω impedance (>-3 dBm nominal, >5 dBm with Option UNR/UNX). Reference output provides 10 MHz lock signal for external instrument synchronization.
