Connor-Winfield's Wi125 is a small OEM, surface mount GPS module specifically designed for use in synchronization and timing in WiMax applications. The Wi125 module is the latest family member of Connor Winfield’s Global Timing Solutions Group that offers a wide variety of GPS based timing and frequency products specifically designed for standard or high precision timing and synchronization applications.
This compact, WiMax-compatible module has an onboard, programmable NCO oscillator that outputs a synthesized frequency up to 30MHz steered by a GPS receiver. The self-survey mode of operation allows the receiver to enter a position hold mode, allowing accurate timing to be continued with only one satellite being tracked.
Additionally, the Wi125 has phase alignment of 1PPS/10MHz with a very stable holdover. The 1PPS/10MHz outputs maintain phase alignment with holdover being based only on the local oscillator, dismissing spurious GPS measurements during reacquisition. When the receiver regains GPS lock after a period of holdover, the 1PPS and 10MHz outputs maintain phase alignment and are offset in frequency at the maximum rate of 100ppb until the 1PPS aligns with that of the GPS solution. The controlled recovery from holdover allows for uninterrupted operation of the WiMax base station.
The Wi125 has a highly accurate output frequency, which can achieve full PRC MTIE performance. Additionally, it can track satellites and provide GPS synchronization in weak signal areas, which include indoor applications, reducing the need for high antenna placement. The Wi125 has an exceptionally small surface mount package with a highly integrated architecture that requires a minimum of external components, allowing easy integration into host systems.
