• VCL-GPS-2145-D

VCL-GPS-2145-D IEEE-1588v2 PTP Grandmaster and Primary Reference Clock and with 1+1 Redundant GPS

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VCL-2145-D, GNSS (GPS-GLONASS-SBAS) PRIMARY REFERENCE CLOCK
Product Overview

VCL-GPS-2145-DOrion Telecom Networks Inc. offers its VCL-2145 (VCL-2145-D) is a high-performance, GNSS (Global Navigation Satellite System) Primary Reference Clock that provides ITU-T G.811 Primary Synchronization Frequency References which are locked to a user selected GNSS (GPS-GLONASS-SBAS) Satellite source.

The VCL-2145 (VCL-2145-D) Satellite Receiver also has an integrated, high bandwidth NTP Server engine that is capable of handling up to 3000 NTP requests per second. Multiple IRIG-B Outputs are also provided to synchronize local clock (time-of-day) display units as well as RTUs to a central timing source with nanosecond accuracy.

Data Sheet (PDF)

The VCL-2145 (VCL-2145-D), Satellite (GNSS) Primary Reference (PRC) Clock is specifically designed for frequency synchronization of 2G, 3G, HetNet and LTE mobile telecommunications networks as well as backhaul wire-line SDH / SONET and Synchronous Ethernet networks. It may be also used by Railways, Airports (and air-traffic control), Power generation and distribution companies and other Utility companies who not only require highly precise G.811 frequency synchronization locked to a GNSS Reference but who also need to provide an accurate time-of-day reference in their networks.

The VCL-2145-D is always locked to a user selected satellite (GNSS: GPS-GLONASS-GAGAN) reference to provide multiple G.811 / Stratum 1 quality frequency and time-of-day (IRIG-B and NTP) outputs. The VCL-2145 is also equipped highly accurate, low-noise OCXO / Rubidium oscillator which provides a high stability holdover clock that is typical of a Network SSU in the event of the GNSS signal, or its antenna failure.

Available Version

Model Description
GNSS Primary Reference Clock
VCL-2145 (VCL-2145-D),
GNSS Primary Reference (PRC) Clock
VCL-2145, GNSS Primary Reference (PRC) G.811 Clock.
Provides 1PPS, NMEA, 1/5/10MHz, 2.048MHz, 2.048Mbits with SSM, 1.544Mbits Frequency Outputs with High Stability OCXO and Rubidium (G.812) Holdover Clock options.

VCL-2145, GNSS Primary Reference (PRC) G.811 Clock with NTP Server.
May be used in multi-service applications as a G.811, Primary Reference (PRC) Clock and NTP Server 1/5/10MHz, 2.048MHz, 2.048Mbits with SSM, 1.544Mbits GNSS referenced outputs. OCXO and Rubidium (G.812) Holdover Clock options are available.

Features and Highlights
  • Reliable, Cost-Efficient Reference GNSS Receiver
  • 50 Channel GNSS, L1 frequency, C/A Code Receiver
  • Available with 1+0 (VCL-2145, without GNSS redundancy) and 1+1 (VCL-2145-D, with GNSS redundancy) options
  • User selectable GNSS options - GPS, GLONASS, GPS+GLONASS, GPS+SABS (ISRO-GAGAN, WAS and EGONS)
  • Tracks up to 12 GPS Satellites
  • Tracks up to 10 GLONAS Satellites
  • Tracks up to 2 SBAS Satellites (including ISRO-GAGAN, WAS and EGONS Satellite Systems)
  • Concurrent tracking of up to a total of 34 Satellites
  • ITU-T G.811 Primary Reference (PRC) Clock
  • GNSS locked G.703 compliant E1, 2.048MBits, 1.544Mbits and 2.048 MHz outputs
  • Primary reference and holdover functionality:
  • ITU-T G.811 / Stratum 1 compliant (PR) Primary Reference when locked to GNSS
  • ITU-T G.812 compliant holdover
  • SSM Message format Compliant with ITU-T G.704. Optional GR-378-CORE for SONET Networks
  • 1/5/10 MHz output
  • 2Mhz and 2Mbps Primary Reference Clock outputs
  • 1 PPS outputs
  • IRIG-B outputs
  • Standard RJ45 and BNC connectors for all inputs and outputs
  • ToD compliant to NMEA 0183 (DB9 Serial Port).

Additional Features

  • High bandwidth NTP Server capable of supporting up to 3000 NTP requests per second
  • IPv4 and IPv6 compatible NTP Server
  • SSH, Telnet, Radius, SNMP V2 MIB, Password Protection
  • Redundant AC and DC power supply options
  • 4, 10/100/1000BaseT Network Interface Ethernet Ports
  • Power Contact and Lightening Protection as per Telcordia GR-1089-CORE.

Typical Synchronization Applications

  • Synchronizing Cellular networks like UMTS, GPRS, 3G and LTE
  • Power generation and distribution companies and other utility companies
  • Wireless and Wireline Telecom synchronization
  • Distributing Time (ToD) and Frequency reference for power utilities across all nodes of the network
  • Synchronization of Defense Networks
  • Synchronizing airports and aviation communications
  • Synchronizing railway signalling networks and railway communications
  • Synchronizing traffic management
  • Broadcasting Network and Broadcast equipment synchronization.
Technical Specifications

GPS Receiver:

  • 50 Channel GPS Receiver
  • GPS L1 frequency, C/ACode Receiver
  • Tracks up to 12 satellites simultaneously
  • Synchronizing Time:
    • Cold Start (includes almanac acquisition time): 27 seconds
    • Time-To-Fix (almanac acquisition already completed): 1 second
    • (Note: with all satellites in view at -130db)

  • GPS Signal
    • Tracking and Navigation: -162 dBm
    • Reacquisition -160 dBm
    • Cold Start -148 dBm
  • Antenna Connector: SMA
  • Accuracy Of Time-Pulse Signal referenced to GPS: +/-30ns (raw)
  • Accuracy Of Time-Pulse Signal referenced to GPS: +/-15ns (compensated)
  • (Note: with all satellites in view at -130db)

    Management and Monitoring Ports

  • RS-232C Connector
  • USB Connector
  • 10/100BaseT Ethernet
  • 1 x External Alarm Relay Contact
  • Power Supply Options

  • Dual Redundant
  • 1+1 AC power (100 to 240V AC, 50/60 Hz)
  • 1+1 DC 24V power
  • 1+1 DC -48V power
  • 1+1 DC 110/125V DC power
  • AC or DC
  • Application Diagram

    GPS Receiver as a Primary Reference (PRC) Clock with IEEE-1588v2 Grandmaster and NTP Server

    GPS Receiver as a Primary Reference (PRC) Clock with IEEE-1588v2 Grandmaster and NTP Server