u-blox M8 time & frequency reference GNSS chipUBX-M8030-KT-FT precision time and freqeuncy GNSS chip

u-blox time and frequency products provide multi-GNSS synchronization for cost-sensitive network edge equipment including Femto wireless base-stations. The M8030-KT-FT IC provides a complete GNSS receiver and reference frequency control function. This single-chip RF and baseband IC requires few external components: just a low-cost SQI Flash for program and parameter storage and passive components.

The M8030-KT-FT can control a system reference VCTCXO directly via its in-built PWM DAC, providing both frequency and phase coherence with the best available source of synchronization. Additional remote oscillators may be controlled via a second DAC (DDC) or via the host system. 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.


  • Reception of GPS, QZSS, GLONASS, BeiDou
  • Direct control of 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


  • Receiver type
    • 72-channel u-blox M8 engine
    • GPS/QZSS L1 C/A, GLONASS L10F, BeiDou B1
    • Galileo-ready E1B/C (firmware upgrade required)
  • Accuracy
    • GPS: 2.5 m CEP
    • GLONASS: < 4 m CEP
  • Time to fix Cold starts: 26 s 30 s
    Hot/Aided starts: 1 s 3 s
  • Sensitivity Tracking: –165 dBm –165 dBm
    Cold start (aided): –157 dBm –148 dBm
    (autonomous): –148 dBm –145 dBm
    Reacquisition: –160 dBm –157 dBm
  • Assistance AssistNow Online
    OMA SUPL & 3GPP compliant interface
  • Oscillator Supports VCTCXO
  • LNA Built-in
  • Anti jamming Active CW detection and removal
  • Supported antennas Active and passive
  • External SQI Flash Required for firmware storage and upgrade


  • Product summary
  • The UBX-M8030-KT-FT Data Sheet, Hardware Integration Manual, and Receiver Description Including Protocol Specification require an NDA and can be obtained by contacting u-blox



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