• GF-8048 GPS Rubidium Disciplined Oscillator

GF-8048 is a GPS Disciplined Oscillator (GPSDO) designed specifically for digital terrestrial broadcasting applications.
It integrates a GPS receiver and a Rubidium Oscillator, enabling reception of GPS signals and generation of a UTC-synchronized 1PPS (one pulse per second) signal, along with a 10 MHz sine wave signal coherent with the 1PPS signal phase.

Suitable for digital terrestrial master and satellite stations, providing precision 1PPS and 10 MHz stability even in challenging scenarios like signal-shadowed areas or high-field strength environments.

• Easily provides highly stable frequency and high-precision UTC timing worldwide.
• The GF-8048 uses a rubidium oscillator as its base oscillator. Excellent low phase noise performance is achieved through the combination of an OCXO and GPS.
• Even when the GPS receiver loses satellite signals during holdover mode, the GF-8048 continues to output highly accurate and stable 1PPS and 10 MHz signals.
• The GF-8048 achieves coherence accuracy within ±10 ns between the falling edge of the 1PPS signal and the zero-crossing point of the 10 MHz sine wave.
• Every rubidium oscillator requires periodic calibration to maintain high-precision output. The GF-8048 features an automatic calibration function referenced to GPS signals. Real-time GPS control enables a completely maintenance-free GPS-disciplined frequency source.
• Specifically designed for digital terrestrial broadcasting transmission stations (main and relay stations).

• GNSS Reception: GPS L1 C/A; 12 channels (GPS); sensitivity: -133 dBm to -110 dBm
• 10 MHz Output (Lock): Frequency accuracy < ±1E-11
• 1PPS Output (Lock): Accuracy < ±100 ns (95%)
• 10 MHz Holdover: ±2E-11/1h, ±3E-11/12h
• 1PPS Holdover: < ±400 ns/1h
• Free-Running Rubidium: Frequency accuracy < ±5E-10/year
• Power / Environmental / Dimensions: 48 VDC; performance assurance: -10°C to +45°C; operating temperature: -20°C to +60°C; dimensions: 207 × 327 × 98.5 mm
• Others: Antenna short/open detection; open collector alarm output; LED display; protocol: NMEA 0183