VCL-2145-LC
GPS Primary Reference Clock

VCL Products > GPS > VCL-2145-LC, GPS Primary Reference Clock
GPS Primary Reference Clock
GPS Primary Reference Clock
GPS Primary Reference Clock
GPS Primary Reference Clock
GPS Primary Reference Clock
GPS Primary Reference Clock

VCL-2145-LC, GPS Primary Reference Clock

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VCL-2145-LC, GPS Primary Reference Clock is a high precision frequency synchronization solution which may be used to provide ITU-T, G.811 Primary Reference Clocks which are referenced to a GPS source. The VCL-2145-LC, GPS 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 require a highly precise G.811 frequency synchronization locked to a GPS Reference.

Features:

  • Reliable, Cost-Efficient Reference GPS Receiver
  • 50 Channel GPS, L1 frequency, C/A Code Receiver
  • Simultaneous tracking of up to 12 GPS satellites
  • ITU-T G.811 Primary Reference (PRC) Clock
  • GPS locked G.703 compliant E1, 2.048 MBits, 1.544 Mbits and 2.048 MHz outputs
  • Primary reference and holdover functionality:
    • ITU-T G.811 / Stratum 1 compliant (PRC) Primary Reference Clock when locked to GPS
    • 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
  • Standard RJ45 and BNC connectors for all inputs and outputs
  • ToD compliant to NMEA 0183 (DB9 Serial Port).
  • Support anti-jamming and anti-spoofing

Additional Features:

  • Telnet, SNMP V2 MIB, Password Protection
  • Redundant AC and DC power supply options
  • Power Contact and Lightening Protection as per Telcordia GR-1089-CORE.

Available Version:

Model Description
VCL-2145-LC
GPS Primary Reference (PRC) Clock
  • VCL-2145-LC is a high-performance, GPS/GNSS (Global Navigation Satellite System) Primary Reference Clock that provides ITU-T G.811 Primary Synchronization Frequency references which are locked to GPS/GNSS Satellite sources.
  • The VCL-2145-LC provides multiple Input and output options.
  • Input options: GPS/GNSS, 10MHz, 2.048MHz, 2.048 Mbps, 2.048MHz / 10MHz (TTL IN).
  • Output options: 2.048 Mbps / 1.544 Mbps, 2.048MHz, 1/5/10MHz, 1PPS, Alarm Relays, NMEA-0183 (TOD - Time-Of-Day).
  • Holdover options:
    • OCXO.
    • Primary Reference when locked to GPS/GNSS (ITU-T G.811 / Stratum 1 compliant)
    • ITU-T G.812 compliant holdover [OCXO (Double Oven-Controlled Crystal Oscillator)]

GPS Receiver:

  • 50 Channel GPS Receiver
  • GPS L1 frequency, C/A Code Receiver
  • Tracks up to 12 satellites simultaneously
  • Synchronizing Time:
    • Acquisition time - Hot Start: Less than 15 sec.
    • Acquisition time - Warm Start: Less than 45 sec.
    • Acquisition time - Cold Start: Less than 140 sec.
  • GPS Signal:
    • Tracking and Navigation: -162 dBm
    • Reacquisition -160 dBm
    • Cold Start -148 dBm
  • Antenna Connector: TNC
  • 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)
  • Phase Accuracy: As per ITU-T G.8272

Clock performance - GPS

  • ITU-T G.811

Frequency Accuracy:

  • <1x10-11; (24 hour average)
  • G.811 quality when locked to GPS

Internal (G.812) Synchronization Options:

  • Rubidium
  • OCXO (Oven-Controlled Crystal Oscillator)

Frequency Holdover

  • Long-term stability: 1x10-10/day, 2x10-8/year
  • Frequency stability: 6x10-10(-50°C to +55°C)

System Access, Control and Management Options:

  • Telnet, CLI
  • CLI Control Interface (HyperTerminal or VT100)
  • GUI (Graphical User Interface) - Runs on any PC operating on Windows XP, Windows 7, Windows 8 OS or Windows 10 OS.
  • SNMP V2 Traps (MIB File provided)
  • RS-232C
  • USB
  • 10/100BaseT Ethernet - RJ-45
  • 2 x External Alarm Relay Contacts.

MTBF:

MTBF for VCL-2145-LC with RbXO Option:

  • Per MIL-HDBK-217F: ≥ 17 years @ 40°C
  • Per Telcordia SSR 332, Issue 1: ≥ 20 years @ 40°C

MTBF for VCL-2145-L C with OCXO Option:

  • Per MIL-HDBK-217F: ≥ 21 years @ 40°C
  • Per Telcordia SSR 332, Issue 1: ≥ 24 years @ 40°C

Redundant Power Supply Options:

  • AC (100V AC to 240V AC, 50/60 Hz)
  • DC (24V DC, 48V DC, 110V DC to 220V DC
VCL-2145-LC Application
Mechanical Drawing (PDF)