NR3620-OG 10 MHz GNSS GPS Disciplined OCXO Timing Reference NMEA

NR3620-OG

10 MHz Frequency Reference GNSS GPS Disciplined Oscillator

The “O/G” in the model name specifies the presence of an OCXO (O) and GNSS/GPS (G) capability.

• GNSS-disciplined 10 MHz OCXO frequency reference with auto-calibration and non-volatile storage
• Precision 1PPS timing output (selectable 3.3V CMOS or 5V CMOS) with ~20 ns RMS PPS accuracy
• Excellent holdover: ≈5 ppb/day, ≈50 ppb/year using stored compensation coefficients (drift compensation)
• Wide input power range: DC power options (10–18 Vdc, 18–36 Vdc, 36–65 Vdc) or AC adapter; flexible power range for system integration
• OCXO-based low-noise reference with low phase noise for precision timing and master timing applications
• GNSS GPS lock indicator, built-in self-test and status signal monitoring for reliable system health reporting
• Available as kit (DO Kit / GPS DO kit) with antenna and 50 ft cable included for turnkey deployment
• Modular/chassis module options and multi-channel upgrade paths (NR3623-OG 3-ch, NR2310D-OG 10-ch) for simulcast and telecom
• Compact PCB assembly and PCB oscillator form factor for easy system integration and embedded PCB use

The NR3620-O/G is a general-purpose 10 MHz frequency reference ideal for lab, telecom, simulcast and test systems. Leveraging a GNSS-disciplined OCXO with auto-calibration and non-volatile coefficient storage, it delivers precision timing, robust holdover, and low phase noise for master timing and timing reference applications. Flexible power options and kit configurations make it straightforward to integrate into system integration projects requiring reliable 10 MHz sources, 1PPS, NMEA/GNSS outputs and detailed lock/status indicators.

Frequently Asked Questions

1. Q: What power inputs and kit options are available?
   A: Operates from DC power (10–18 Vdc, 18–36 Vdc, 36–65 Vdc) or AC adapter. A kit option (DO Kit) is available including antenna and 50 ft cable for turnkey deployment.
2. Q: What are the 1PPS output levels and accuracy?
   A: 1PPS is available at selectable 3.3V CMOS or 5V CMOS levels (capable of driving a 50 Ω load). PPS accuracy is typically ~20 ns RMS under GNSS lock.
3. Q: How does the unit handle GNSS loss and long-term stability?
   A: The NR3620-O/G stores auto-calibration coefficients in non-volatile memory to compensate for OCXO aging and temperature; expected holdover is ~5 ppb/day and ~50 ppb/year for drift compensation during GNSS outages.