The LN Rubidium GPSDO is a low-noise GNSS‑disciplined frequency standard with long‑term oscillator aging under 0.1 ppb per month for ultimate and premium options and under 0.3 ppb for the standard model, with zero aging when GNSS‑locked. It offers excellent temperature stability, reaching below 0.07 ppb for the ultimate variant. When GPS‑locked in position‑hold mode for 72 hours, it delivers ±10 ns RMS 1 PPS stability. Holdover stability stays within ±0.6 µs over 24 hours at 25°C for higher‑grade models after extended GPS conditioning. The ultimate OCXO option provides superior ADEV performance, reaching as low as 5E‑13 at 1 second and 8E‑14 at 100,000 seconds, with 1 PPS outputs steered by the Rubidium or OCXO source.

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