CW25-GDO-DK GPS Receiver and GPS Oscillator Module

The Connor-Winfield CW25-GDO-DK series is a GPS receiver and GPS-disciplined oscillator module combined that is designed specifically for time and frequency synchronization applications. This module incorporates a GPS receiver and a digital PLL circuit for disciplining the 1 PPS signal derived from the receiver’s GPS solution. Autonomous-phase calibration capability offsets sawtooth error, eliminating hanging bridge conditions.

In addition to generating a phase-aligned 1 PPS output, the module generates three clock signals phase-aligned to the 1 PPS signal. Output clocks include one digitally synthesized clock output at frequencies from 150 Hz to 80 MHz and two low-jitter 10 MHz clock outputs generated from an integrated APLL block with options for 3.3 V CMOS and/or differential LVPECL/LVDS signals at frequencies up to 700 MHz.

An onboard TCXO provides the system’s primary clock for holdover performance. The module supports an optional external 1 PPS input as well as an optional external 10 MHz clock input that can be used for improving holdover performance. This product can be used to generate a high-stability frequency reference for use in wireless systems, software-defined radio systems, time stamping, IEEE 1588v2, and applications employing a 1 PPS frequency source for high precision and long-term time and frequency generation.