IQCM-300

ISSUE 1; February 2016 Description High Holdover Capability PTP, 1588 Clock Module. Designed to provide easy-to-use holdover capability for GPS receivers. Ideal protection against deliberate or accidental GPS jamming and weather-related outages Applications include Base Station, Clock Source, Clock Server and IP Backhaul Supports IEEE 1588V2,can be1588 master or slave Holdover stability up to 1.5µs over 24hours, achieved using an adaptive algorithm. Internal parameters of the algorithm, including maintenance alarms and messages are available to the user via serial interface. Working States (Reference Drawing): Run1: Fast track. Adjust the OCXO 10MHz output frequency quickly to track the 1PPS to 10MHz with 1PPS reference. Run2: Slow track. Adjust the OCXO 10MHz output frequency slowly when phase error is in the defined range. Holdover: No 1PPS input present; an algorithm enables adaptive modelling of the frequency stability of an OCXO with reference to the GPS timing signal. Fr...