SAASM HD CSAC and DOCXO GPSDO

The SAASM HD GPSDO product line combines for the first time a P(Y) capable military SAASM dual-frequency GPS receiver with a chip-scale atomic clock on a ruggedized PC board with dimensions of only 2.0 x 2.85 x 0.6 inches. CSAC or DOCXO oscillators offer three variants for timing or Low Phase Noise frequency applications. The SAASM HD GPSDO can receive L1 and L2 GPS signals with C/A and P(Y) code and is optimized for providing a highly accurate Position, Velocity, Time, and Frequency reference under extreme environments as encountered in aircraft, tracked and wheeled vehicles, and man-packs.

The SAASM HD GPSDO provides 10 MHz, 1PPS, and Position- and Velocity information (“PVT Assured Operation”) to the user operating even in hostile environments using Anti-Spoofing and Anti-Jamming technology. A built-in Cesium Vapor Atomic Clock provides extremely accurate timing and frequency performance when in GPS holdover mode, up to only 1µs drift per day typically, and allows full operational readiness within 2 minutes after power-on. 

Using the latest generation Rockwell Collins MicroGRAM SAASM GPS Receiver and a Symmetricom/Microsemi CSAC Atomic Oscillator on one PCB allows the SAASM HD CSAC to operate with less than 1.1 W total power consumption - more than one order of magnitude less than the closest legacy solutions. The DOCXO version (the SAASM FireFly-IIA GPSDO) is form-fit-function compatible and has a phase noise of typically -102dBc/Hz at 1Hz offset, and only -137 dBc/Hz at 10Hz offset. The Allan Deviation of this DOCXO variant is consistently in the xE-012 range.

With the smallest Size, Weight, and Power (SWAP) requirements in the industry, and a very reasonable cost, the SAASM HD GPSDOs open up a world of new applications to the customer.

The SAASM HD GPSDO product line has been granted Security Approval by the Global Positioning System Directorat