EC20S and EC22S Epsilon GPS Clock

GPS clock for digital broadcast
EC20S GPS Clock

High-performance GPS Clocks are designed to exceed digital TV, digital Radio, 4G base stations, satcom time and frequency synchronization requirements

Epsilon Clocks provide accurate and stable time and frequency signals for your high-performance synchronization application. The unit’s optimized architecture is well-suited to transmitter synchronization of digital broadcast signals (DVB-T/T2, T-DMB, DAB or DRM) in Single Frequency Networks (SFN) modes: the high port density allows to synchronize many emitters simultaneously on the same site.

Common Features

  • High-performance GPS clock
  • EpsilTime™ smart predictive slaving algorithm
  • High time & frequency accuracy, even if GNSS is lost
  • Network management based on Web User Interface and SNMP
  • NTP stratum 1 support
  • RoHS Compliant

EC20S Includes

  • GNSS-disciplined OCXO internal timebase
  • Optional Rubidium clock for extended holdover performance
  • up to 10 x 1PPS TTL outputs
  • up to 10 x 10 MHz sine wave

EC22S Includes

  • Fully redundant dual GPS clock modules (hot swappable)
  • OCXO internal timebase
  • Smart switching with low phase jump, in case of clock failure, to provide continuous high quality synchronization signals:
  • 8 x 1 PPS TTL outputs
  • 8 x 10 MHz sine waves


Epsilon Clocks provide high reliability synchronization with very accurate and stable time and frequency signals. The high performance suits a comprehensive range of applications where excellent accuracy is required, especially synchronization of mobile wireless base stations, emitters for digital audio or video broadcast.

A high performance ovenized oscillator (OCXO) slaved to the GPS/GNSS input source offers outstanding accuracy and phase noise. The oscillator in conjunction with the EpsilTime™ smart predictive slaving algorithm mitigates the effects of inherent GPS noise and complies to the most stringent holdover mode requirements if GPS is lost. Furthermore, the 10 MHz frequency reference is cycle-locked to the 1 PPS, meaning that there are always exactly ten million cycles between 1 PPS occurrences. This unique feature is essential to avoid phase jumps and wander between time and frequency references. The EC20S is available with an optional Rubidium atomic clock reference for extended holder performance in the case of loss of satellite signals and when there is no redundancy.


Designed for any applications that demand quality, reliability, and availability

  • Digital Video and Audio Broadcast:
    • DVB-T/H/SH
    • FLO
    • T-DMB
    • ISDB-T
    • DAB
    • DRM
  • Wireless Telecom:
    • CDMA
    • WiMAX
    • TDOA caller locations


White Papers

Cost-effective Synchronization for Digital Broadcast


EC20S Epsilon Clock Datasheet
EC22S Redundant Epsilon Clock Datasheet

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