The LN CSAC GPSDO provides highly stable timing with long-term oscillator aging under 0.3 ppb per month in holdover and zero aging when GPS‑locked. Its CSAC offers frequency stability better than ±0.5E‑09 from 0°C to 75°C without GPS disciplining, and 1 PPS accuracy of ±15 ns RMS in position-hold mode. After 96 hours of warmup, it delivers holdover stability within ±2 µs over 24 hours at 25°C following 20 minutes of GPS lock. ADEV performance with the DOCXO option reaches below 2E‑12 at 1 second and 2E‑12 at 10,000 seconds. Outputs include a 5 V CMOS 1 PPS adjustable in 1 ns steps, four isolated +13 dBm 10 MHz sine outputs, and one 5 MHz CMOS output, with strong port isolation and robust distribution.

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