LEA-M8F time & frequency reference GNSS EVAL module

LEA-M8F GPS, Glonass, Beidou receiver with time & frequency reference. Ready to use EVAL module

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. The LEA-M8F module includes a low-noise 30.72 MHz VCTCXO meeting the master reference requirements for LTE Small Cells and provides 100 ppb autonomous hold-over. The LEA-M8F module can also measure and control an external TCXO or OCXO for TD-LTE, LTE Advanced and other applications requiring extended hold-over. External sources of synchronization are supported through time-pulse and frequency inputs and a message interface. This allows measurements from macro-sniff, Sync-E or packet timing to be combined with measurements from GNSS. They feature a high dynamic range radio with both analog and digital interference mitigation supporting their inclusion as an integral part of a local area base station design.

LEA-M8F EVAL board Features

• Power Supply & Data Link via USB
• USB 1.1 Device/USB V2.0 compatible
• Active and Passive Antenna support
• u-center Evaluation Software
• Easy to use
• Extensive visualization and evaluation features
• Supports AssistNow Online and AssistNow Offline A-GPS services
• 1 USB port, 1 TTL UART port, 1 SPI port
• Time pulse output LED and pin for time synhronization
• SDA SCL Pin for external DAC>
• 38.72MHz oscillator out
• Two Freq Phase in for external oscillator control
• PCB Size 33x31 mm
• Fully assembled and ready to use

LEA-M8F 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

LEA-M8F 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

• LNA: Built-In
• Internal oscillator: VCTCXO
• Anti jamming: Active CW detection and removal
• Supported antennas: Active and passive
• Internal SQI Flash: For firmware update
  
  
• LEA-M8F (timing) Product Summary
• LEA-M8F (timing) Data Sheet
• LEA-M8F (timing) Hardware Integration Manual