How to Choose an XGY RF Signal Generator

RF signal generators are selected by frequency range, spectral purity, output power, modulation needs, and how the source will be controlled. XGY offers portable field sources, compact benchtop microwave generators, PXIe signal generation, and fixed-frequency low-phase-noise sources.

Quick Recommendation

Need	Best fit	Why it fits
Portable RF stimulus for field or shared lab use	YSG-P400 Signal Generator	Portable source covering 200 MHz to 40 GHz with OCXO stability and output control for field receiver and subsystem test.
General benchtop microwave source to 40 GHz	YSG-400B Series Signal Generator	9 kHz to 40 GHz coverage, low phase noise, and broad output range for lab R&D and component validation.
PXIe microwave source for automated racks	YSG-5451 Signal Generator	PXIe modular source covering 9 kHz to 45 GHz for chassis-based ATE and synchronized RF systems.
Reference-grade fixed-frequency LO or clock source	YSG-140 Low Phase Noise Frequency Source	Factory-configured fixed output from 1 GHz to 52 GHz with strong spurious suppression for clean LO and reference duties.

Model Comparison

Model	Frequency range	Form factor	Typical role
YSG-P400	200 MHz to 40 GHz	Portable, under 3 kg	Field receiver checks, chamber stimulus, and portable lab work.
YSG-400B	9 kHz to 40 GHz	Benchtop	General RF and microwave R&D with wide output-power control.
YSG-5451	9 kHz to 45 GHz	PXIe modular	ATE racks and synchronized multi-instrument systems.
YSG-140	1 GHz to 52 GHz factory-configured	Fixed-frequency source	Low-phase-noise LO, reference, and clock source applications.

How to Decide

Choose the frequency ceiling first

For sub-40 GHz RF and microwave work, YSG-P400 and YSG-400B cover most portable and benchtop use cases. Choose YSG-5451 when the system is PXIe-based or when 45 GHz chassis integration matters. Choose YSG-140 when the output frequency is fixed and phase noise matters more than tunability.

Match form factor to workflow

Portable sources are useful when the instrument moves between benches, chambers, and field sites. Benchtop sources are easier to operate for daily lab work. PXIe sources make sense when the source must share timing, trigger, and software control with other modular instruments.

Check spectral purity and output level

Receiver sensitivity, radar Doppler, phase-noise, and low-EVM tests need a cleaner source than simple go/no-go functional checks. If the target DUT needs more drive than the source can provide, pair the generator with an RF power amplifier and directional coupler.