GF-8705 Multi-GNSS Disciplined Oscillator

Furuno | GF-870X Range
OCXO equipped High sensitivity Multi-GNSS Disciplined Oscillator which has expanded capabilities, world's best-in-class holdover function and low phase noise
  • GF-8705 outputs 1PPS synchronized with UTC as well as 10MHz coherent to 1PPS.
  • GF-8705 can receive concurrent GPS, GLONASS, QZSS (Quasi-Zenith Satellite System) and SBAS signals.
  • GF-8705 is suitable not only for wireless communication, network communication and Grandmaster clock for multimedia broadcast, but also as a atomic oscillator replacement.


  • Outputs accurate 1PPS, low phase noise, highly stable frequency coherent to 1PPS
  • Built-in high-sensitivity timing Multi-GNSS receiver with improved noise tolerance for harsh environments
  • Supports world's best-in-class holdover function
  • Support compatible design depending on customer's requirement
  • Time Synchronization
  • Wide operation temperature range
  • Suitable for various communication and broadcasting applications


GNSS Reception Capability

  • GPS L1 C/A,
  • QZSS L1 C/A
  • SBAS L1 C/A

GNSS Reception

  • 26 channels (GPS, GLONASS, QZSS, SBAS)



  • Tracking: -161 dBm
  • Acquisition: -147 dBm


  • Tracking: -157 dBm
  • Acquisition: -143 dBm

*Measurement platform with recommended active antenna

Time to "Fine Lock"

  • 5 min

10MHz Output (Normal Status)

  • Frequency Accuracy (24h avg.): <±1×10-12
  • Short Term Stability: <1×10-10

1PPS Output (Normal Status)

  • 1PPS Accuracy: <±50ns
  • 1PPS Stability: <15ns (1σ)

10MHz Output (Holdover)

  • Frequency Accuracy (24h): <±1×10-9
  • Short Term Stability: <1×10-10

1PPS Output (Holdover)

  • 1PPS Accuracy: <±5μs/24h

Supply Voltage

  • 5.5VDC

Power Consumption

  • <0.5A (5.5VDC, Normal Status)

Backup Supply

  • 1.4 to 3.6VDC / 0.4 μA (Normal Operation)

Operating Temperature

  • -40°C to +85°C

Antenna Detection

  • Short and Open Detection

Outer Size

  • 100mm x 52mm x 20mm


  • eSIP (NMEA 0183 Standard Ver 4.10)


  • Available

Multipath Mitigation

  • Available


  • External Reference Synchronisation
  • Output Status Signal