The PXI-1450B Local Oscillator Module is a PXI 3U, 2-slot synthesizer module intended for frequency down conversion applications. The PXI-1450B is a VCO-based, 3 to 9 GHz synthesizer capable of a tuning resolution of less than 1 Hz. It is optimized for speedy (1 ms) settling time to allow for fast frequency down conversion applications that employ Phase Matrix models PXI-1420 MW Downconverter Module (2.7 to 26.5 GHz) and PXI-1430B RF Downconverter Module (100 kHz to 2.9 GHz). The PXI-1450B contains all the circuitry necessary to lock the synthesizer and a 100 MHz ovenized crystal oscillator to an externally provided 10 MHz master reference oscillator. This capability enables the module to distribute its internal high-stability reference or the customer-provided external reference to other PXI modules within a PXI mainframe chassis.