u-blox M8 time & frequency reference GNSS module

LEA-M8F precision timing GNSS moduleThe LEA-M8F provides multi-GNSS synchronisation for cost-sensitive network edge equipment including Small Cell and Femto wireless base-stations. The LEA-M8F module is a fully self-contained phase and frequency reference based on GNSS, but can also be used as part of a complete timing sub-system including macro-sniff Synchronous Ethernet and packet timing.

Highlights

  • Reception of GPS, QZSS, GLONASS, BeiDou
  • Integral low phase-noise 30.72 MHz system reference oscillator disciplined by GNSS
  • Accurate measurement and control of external oscillators
  • High sensitivity acquisition and single-satellite timing
  • Automatic hold-over
  • Prepared for integration with external PTP, Sync-E and network listen

    Features

      • Frequency output: 30.72 MHz disciplined
      • Phase noise:
        • 10 Hz: –90 dBc/Hz
        • 10 kHz: –147 dBc/Hz
        • 100 Hz: –126 dBc/Hz
        • 100 kHz: –153 dBc/Hz
        • 1 kHz: –140 dBc/Hz
        • 1 MHz: –156 dBc/Hz
      • Jitter (100 Hz - 1 MHz): 0.15 ps
      • EVM (100 Hz - 1 MHz @ 2100 MHz): < 0.2%
      • Frequency control (internal oscillator)
        • GNSS locked: 5 ppb
        • Hold-over: 100 ppb, 24 hr
      • Frequency control (external oscillator)
        • Resolution: < 5 ppb
        • Frequencies: 19.2, 20, 26, 30.72 MHz
        • Hold-over: Determined by external oscillator
      • Phase control
        • Clear sky: < 20 ns
        • Indoor: < 500 ns typ.
      • Time-pulse input Resolution: < 50 ns
      • Time-pulse output Jitter: < 2 ns
        • u-blox M8 positioning engine:
          • 72-channel u-blox M8 engine
          • GPS/QZSS L1 C/A, GLONASS L10F, BeiDou B1
          • SBAS L1 C/A: WAAS, EGNOS, MSAS
          • Galileo-ready E1B/C (external Flash required)
        • A-GPS: AssistNow Online and AssistNow Offline services, OMA SUPL and 3GPP compliant
        • Accuracy
          • GPS 2.5 m CEP
          • GLONASS: < 4 m CEP
        • Acquisition
          • Cold starts: GPS 26 s, GLONASS 30 s
          • Hot/Aided starts: GPS 1 s, GLONASS 3 s
        • Sensitivity
          • Tracking: GPS –167 dBm, GLONASS –158 dBm
          • Cold start
            • (aided): GPS –155 dBm, GLONASS –138 dBm
            • (autonomous): GPS –148 dBm, GLONASS –138 dBm
          • Reacquisition: –160 dBm
        • Assistance: AssistNow Online
        • OMA SUPL & 3GPP compliant interface
        • LNA: Built-In
        • Internal oscillator: VCTCXO
        • Anti jamming: Active CW detection and removal
        • Supported antennas: Active and passive
        • Internal SQI Flash: For firmware update



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