The Keysight E8257D PSG is a high-performance microwave signal generator delivering output power, metrology-grade level accuracy, and superior phase noise performance across frequencies up to 67 GHz. This fully-synthesized source supports pulse, FM, and ΦM modulation, making it suitable for demanding RF and microwave test environments requiring precision frequency and level control.
Frequency extension capabilities expand the E8257D into the millimeter-wave and terahertz bands through Virginia Diodes, Inc. (VDI) SGX modules. These amplifier/multiplier chain (AMC) extensions preserve the accuracy and resolution of the base unit while enabling test signal generation up to 1.1 THz.
Technical Specifications
• Frequency Range (Base Unit): Up to 67 GHz
• Frequency Range (With Extenders): Up to 1.1 THz
• Output Power: across frequency range; module-dependent output from +8 dBm to +20 dBm
• Level Accuracy: Metrology-grade
• Phase Noise: Superior performance specification
• Modulation: Pulse, FM, ΦM
• CW Frequency Switching: ≥5 ms to within 0.05% of final frequency
• Trigger Response: From GPIB trigger to frequency within 0.1 ppm (above 250 MHz) or 100 Hz (below 250 MHz)
– Key Features
• Full frequency synthesis with fast CW switching capability
• Multiple frequency extension modules targeting 50 GHz to 170 GHz bands
• High output power across modulation types
• Metrology-grade frequency and level accuracy for precision measurements
• Direct GPIB control with specified trigger-to-lock timing
– Typical Applications
• Millimeter-wave component and subsystem testing
• THz signal generation for advanced RF research
• Modulation performance verification (pulse, FM, phase)
• High-frequency receiver characterization
– Compatibility & Integration
The E8257D integrates with VDI SGX frequency extension modules:
• E8257DV15: 50–75 GHz, WR15 flange, +20 dBm
• E8257DV12: 60–90 GHz, WR12 flange, +15 dBm
• E8257DV10: 75–110 GHz, WR10 flange, +14 dBm
• E8257DV08: 90–140 GHz, WR8 flange, +9 dBm
• E8257DV06: 110–170 GHz, WR6.5 flange, +8 dBm
• E8257DV01, V1B, V2B: THz-range modules
