EC31M Epsilon Clock0 pages

Epsilon Clock
Model EC31M

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High performance GPS master clock

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Remote management by SNMP/HTTP

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Acquisition of Time Reference: GPS, 1PPS,
IRIG-B

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2 x Ethernet, independent ports

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2 x 1PPS TTL outputs

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2 x 10 MHz sine wave outputs

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1 IRIG-B output

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Time of Day output for date-stamping up to 4
external events

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RoHS Compliant

The Epsilon Clock™ Model EC31M is a GPS master clock designed to integrate with
IP networks. The Model EC31M’s versatility makes it ideally suited for military time and
frequency applications. With two physically independent Ethernet ports, control and
traceability of the synchronization system over your network LAN and/or WAN are
guaranteed. The Model EC31M synchronizes all network devices that have an NTP client
and are connected via Ethernet. It offers one IRIG-B timecode output, two 1PPS outputs, and
two 10 MHz outputs, allowing it to synchronize a variety of equipment. It also has a dating
output which precisely date-stamps up to 4 external events.
If its GPS signal is lost for any reason, the Model EC31M automatically synchronizes to
other time references according to their availability and by order of priority. These include
an external 1PPS (combined with an NMEA message) and IRIG-B. These signals continue
to serve as references for disciplining the internal oscillator. OCXO and Rubidium precision
oscillators are available for improved microprocessor-controlled accuracy and reliability in
holdover mode (should all external references be lost). The oscillator, in conjunction with the
EpsilTime™ smart predictive slaving algorithm, mitigates the effects of inherent GPS noise
and complies with the most stringent holdover mode requirements.
The Epsilon Clock Model EC31M includes a high-performance, low phase noise OCXO
or Rubidium oscillator. This internal oscillator, slaved to the GPS source or external 1PPS
source, yields a high level of timing accuracy (+/-25 ns at 1σ).

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UK | 6A Beechwood | Chineham Park | Basingstoke, Hants, RG24 8WA | +44 (0)1256 303630 | info@spectracom.co.uk

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FRANCE | 3 Avenue du Canada | 91974 Les Ulis, Cedex | +33 (0)1 64 53 39 80 | sales@spectracom.fr

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USA |1565 Jefferson Road, Suite 460 | Rochester, NY 14623 | +1.585.321.5800 | sales@spectracomcorp.com

. . . quality

The Model EC31M offers advanced monitoring and network management functions that
can be controlled locally through the serial port, or remotely through the embedded SNMP
protocol. When connected to a network with a DHCP or BOOTP type address server, the
assignment of the IP address is automatic. Also included is a router that provides automatic
routing to linked networks through gateways.