Spectra EC22S, User Manual

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EPSILON CLOCK MODEL EC22S Spectracom Corporation
EPSILON CLOCK User’s Manual 1-8
There is one AC converter and one DC converter on each Clock module. The power supply for
distribution and management is a combination of sources from both modules.
1.11 1.11 1.11 1.11 Terminology Terminology Terminology Terminology
GPS Global Positioning System
OCXO Oven Controlled XTAL (Crystal) Oscillator
Rb Rubidium oscillator
S/A Selective Availability
TRAIM Time Receiver Autonomous Integrity Monitoring
UTC Universal Time Coordinated
1PPS One Pulse Per Second
1 PPS driver Pulse signal obtained through division of the frequency driver
Holdover If the reference input signal is lost, the EPSILON CLOCK® maintains the
generation of information and of time and frequency signals.
Reliability Concerns the positioning mode of the antenna. In automatic mode, the
EPSILON CLOCK® calculates the position of the antenna and, after
testing the result, imposes the reliable position on the internal GPS
receiver. The receiver therefore functions in GPS 0D reception mode. The
EPSILON CLOCK® is synchronized by following at least one satellite.
Frequency driver Frequency signal generated by the built-in oscillator.
Reference input Time and frequency source used by the EPSILON CLOCK®.
IERS International Earth Rotation Service.