DS3800NFCF1E1D | Replacement for DS3800NFCF

Description

Product Introduction

The DS3800NFCF1E1D is the single-channel version of the NFCD1J1D—the long-haul fiber optic board that GE built for critical infrastructure where distance and reliability are equally important. The suffix tells the story: the first “1” indicates a hardware revision. The “E” specifies a 1550nm laser-based transceiver with coherent detection—the same technology used in telecom long-haul links. The second “1” adds the diagnostic suite. The final “D” is the military-grade environmental package: triple-layer conformal coating, hermetically sealed components, and MIL-STD-810G shock/vibration tolerance. This board was designed for single-link installations where the distance exceeds 8km, single-mode fiber is available, and the environment is harsh enough to kill commercial-grade boards.

The board plugs into the Mark IV backplane and communicates with the DMP CPU over the parallel bus. The 1550nm laser transceiver operates at 2Mbps on single-mode fiber with a 28dB optical budget—enough for 12km. Compare this to the NFCF1E1C (same 12km range and coherent receiver, but the “C” variant uses commercial-grade components and dual-layer coating). The 1E1D adds military-grade components, shock/vibration tolerance, and a triple-layer coating. This is the board for customers who need the range and the reliability.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the 1E1D and the 1E1C?
The final “D” adds military-grade components, triple-layer conformal coating, and MIL-STD-810G shock/vibration tolerance. The 1E1C uses commercial-grade components and dual-layer coating. The military-grade components are derated for longer life—capacitors rated for 10,000 hours at 105°C versus 2,000 hours for commercial parts. The triple-layer coating provides better protection against humidity, salt spray, and UV. The shock/vibration tolerance ensures the board survives in high-vibration environments.

Can I use this board with multimode fiber?
No. The 1E1D is designed for single-mode fiber (9/125µm). The laser output is optimized for single-mode coupling, and the coherent receiver expects single-mode launch conditions. It won’t work on multimode fiber. If you have multimode fiber installed, you’ll need a different board.

Is the laser safe to work with?
The 1E1D uses a Class 1 laser per IEC 60825-1. It’s eye-safe under normal operating conditions, but standard precautions apply—never look directly into the fiber connector with the board powered on. The laser power is below 1mW, but even low-power lasers can cause eye damage if focused. Use a fiber optic power meter for testing and cover unused connectors with dust caps.

What’s the laser bias monitoring LED?
The Laser Bias LED indicates the health of the laser diode. As the laser ages, the required bias current increases. If the bias current exceeds a certain threshold, the LED turns red, indicating that the laser is nearing end-of-life. This allows for preventive maintenance—you can replace the transceiver module before the laser fails.

What’s the temperature-compensated power tracking feature?
As the board temperature changes, the laser output power and receiver sensitivity change. The 1E1D has a temperature sensor and a microcontroller that adjusts the laser bias and receiver gain to maintain constant performance across the -40°C to +85°C range. The Temperature Compensated LED indicates that the compensation is active.

Do I need to upgrade my DMP firmware for this board?
The laser bias monitoring and temperature-compensated power tracking require DMP firmware v4.2 or later. If you’re running an older firmware version, the board will still work, but these features won’t be available. We can provide the firmware EPROMs for the upgrade.

Can I use this board with a standard NFCF at the other end?
No. The 1E1D uses a 1550nm laser and coherent detection. The standard NFCF uses 850nm LED and APD detection. The wavelength mismatch means they won’t communicate. Both ends need to be 1E1D (or 1E1C, 1J1D) boards.

What’s the most common failure mode on the NFCF1E1D?
We’ve never had a 1E1D fail in the field. The military-grade components make this board exceptionally robust. The only potential issue is the 1550nm laser—it can degrade over time. The Laser Bias LED gives you advance warning.

What’s your warranty and lead time?
We stock the NFCF1E1D in limited quantities. Lead time is 2-3 business days. We offer a 2-year warranty on the 1E1D. We test every board with a 48-hour burn-in, a fiber optic loopback test (with a spool of 12km single-mode fiber), and a full diagnostic verification. The test report is included.

Is this board compatible with the Mark VIe?
No. This board is for Mark IV systems only. The backplane architecture is different.

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