EC20S Epsilon GPS Clock

EC20S Epsilon GPS Clock
  • GPS clock for digital broadcast
  • GPS clock back panel connections

GPS Clock Overview

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

Epsilon Clock Details

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.

Epsilon Clocks can receive GPS and/or GLONASS satellites, which increases the probability of having the right number of satellites in view and decreases the probability of being jammed. This receiver also include Timing Receiver Autonomous Integrity Monitoring (T-RAIM) to help preventing spoofing.

The highest reliability is provided by the model EC22S with fully redundant clock modules feeding an automatic fast monitoring and switching controller. Outputs signals are switched with very low phase glitch. Both clock modules integrate their own frequency generation circuit and autonomous power supply. They are hot swappable for online repair. Modules are accessible from the front panel.

A similar approach is available with a combination of two models EC20S and the Epsilon Switch and Amplifier System, models SAS17E or SAS36E. This offers scalability to add redundancy in the future and with even more time and frequency outputs.

Setup, status and alarms are accessible by remote control through any internet browser and/or through SNMP protocol. The antenna cable delay and the choice of time scale (UTC or GPS) are programmable. Alarms via relay contacts are available. Status is displayed on the front panel by LEDs.

Applications

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

Resources

Datasheets

EC20S Epsilon Clock Datasheet

More Info
A GPS master clock for digital broadcast synchronization applications.
 pdf - 232 KB
Wednesday, September 26, 2018
By: Spectracom

EpsilWin32

More Info
EpsilWin32’s graphic user interface allows the user to monitor and control Epsilon Clock and Board models. 
 pdf - 88 KB
Monday, July 23, 2012
By: Spectracom

White Papers

Cost-effective Synchronization for Digital Broadcast

More Info
In Europe, Middle East, Africa and Southeast Asia, broadcasters are looking to the DVB-T2 standard to upgrade from analog transmission, their current DVB-T implementation, or as a supplemental network. Similarly, in South America, ISDB-T is being implemented. These and other standards rely more and more on single frequency networks (SFN) to efficiently utilize wireless frequency spectrum. SFNs require synchronization so for each instant of time, every transmission station is broadcasting the same digital data at the same exact frequency.
 pdf - 739 KB
Thursday, July 26, 2012
By: Spectracom

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