The M12M Replacement Receiver is a 72‑channel GNSS module designed as a form‑, fit‑, and function‑compatible replacement for Motorola/iLotus M12+ and M12M timing and navigation receivers. It measures 40×60×9 mm and weighs 15 grams, with a 10‑pin data/power header matching the original M12M layout. The receiver provides 1 PPS stability under 5 ns RMS when GPS‑locked with quantization correction, offering outputs through a 3 V CMOS line, a USB DCD signal for NTP, and a buffered NCO output. Position accuracy reaches under 0.7 m RMS with GPS and SBAS or under 0.5 m in Auto Survey/Position Hold mode. USB control supports SCPI‑99 at multiple baud rates.

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