Agilent Technologies Inc. introduces an ultra-low phase noise option for the PSG vector and analog signal generators. The company also announces a frequency range option for its PSG analog signal generator. Providing coverage over the 250 kHz to 31.8 GHz frequency range, this option offers RF engineers a choice for applications up to 31.8 GHz. Agilent's ultra-low phase noise capability, Option UNX, offers a phase noise performance of 111 dBc/Hz at a 100 Hz offset and 133 dBc/Hz at a 10 kHz offset on a 1 GHz carrier frequency. Designed for signal-generation applications that require spectrally pure signals as well as modulation accuracy, it helps ensure accurate signal simulation and measurements. Option UNX replaces the PSG signal generator's standard internal frequency reference with a high-performance internal frequency reference that improves the close-in phase stability to provide desirable phase noise performance. The 31.8 GHz frequency range option for the PSG analog signal generator, Option 532, provides design engineers working in satellite communications and other K-band applications a flexible and affordable alternative to higher-frequency signal generators.