GF-8704 Multi-GNSS Disciplined Oscillator

Furuno | GF-870X Range
Furuno GF-8704 Multi-GNSS Disciplined Oscillator
OCXO equipped High sensitivity Multi-GNSS Disciplined Oscillator which has expanded capabilities, more accurate holdover function and low phase noise.
  • GF-8704 outputs 1PPS synchronized with UTC as well as 10MHz coherent to 1PPS.
  • GF-8704 can receive concurrent GPS, GLONASS, QZSS (Quasi-Zenith Satellite System) and SBAS signals.
  • GF-8704 is suitable not only for wireless communication, network communication and Grandmaster clock for multimedia broadcast, but also as a atomic oscillator replacement.

Features

  •  Supports GPS, SBAS, GLONASS and QZSS (*2)
  •  Provides high accuracy PPS signal synchronized with UTC
  •  Provides the clock (10 MHz) synchronized with PPS
  •  Software upgrade capability by Flash ROM
  •  Active Anti-jamming capability to suppress effects of CW jammers
  •  Multi path mitigation effects
  •  GPS high sensitivity (-161 dBm (Hot acquisition))
  •  Both GF-8704 and GF-8705 are pin compatible.

Specification

GNSS Reception Capability

  • GPS L1 C/A, GLONASS L1OF
  • QZSS L1 C/A, SBAS L1 C/A

GNSS Reception

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

Sensitivity

GPS

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

GLONASS

  • 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 24.6mm

Protocol

  • eSIP (NMEA 0183 Standard Ver 4.10)

Anti-Jamming

  • Available

Multipath Mitigation

  • Available

Functions

  • External Reference Synchronisation
  • Output Status Signal

 

 

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