The APPH30G, from AnaPico, is a high-performance cross-correlation phase noise test system for 5 MHz to 30 GHz frequencies. The system is a fully self-contained instrument with cross-correlator engine and internal low noise reference sources to enable accurate "one-click" measurements up to 30 GHz. Fully automated frequency acquisition and self-calibration enable the system to operate even under changing environmental conditions. SSB residual and additive phase noise, amplitude noise, AM noise measurement, additive or residual noise characterization and baseband noise measurements up to 30 GHz can be evaluated for RF & microwave signal sources such as crystal oscillators, PLL synthesizers, clocks, phase-locked VCOs, DROs and others. Designed to operate from external 6 Vdc at up to 15,000 feet and 0 to 45°C, the device can be configured to meet specific user requirements. Applications include general purpose phase noise tests, crystal oscillator and VCO testing, PLL synthesizer locking and characterization, supply noise verification, and automated production testing. The test system is optionally available with LAN (VXI-11), USBTMC or GPIB interfaces.