DS3800NFCF1J1G | OEM GE Speedtronic Fiber Optic I/O

Description

Product Introduction

The DS3800NFCF1J1G is the single-channel version of the NFCD1L1E’s deep-space hardened variant—a board that combines 20km range with coherent receiver sensitivity and deep-space radiation tolerance. The suffix tells the story: the first “1” indicates a hardware revision. The “J” specifies a 1550nm DWDM laser with a coherent receiver and an integrated EDFA preamplifier—providing a 42dB optical budget, enough for 20km on single-mode fiber. The second “1” adds the diagnostic suite. The final “G” is the deep-space hardened environmental package: triple-layer conformal coating with ceramic-reinforced topcoat, radiation-hardened electronics rated for 10 Mrad total dose, heavy ion tolerance (LET >100 MeV·cm²/mg), and solar flare event logging. This board was designed for the most extreme environments—deep space missions where 20km range, coherent detection, and the highest possible radiation tolerance are required.

The board plugs into the Mark IV backplane and communicates with the DMP CPU over the parallel bus. The coherent receiver provides better sensitivity than APD-based alternatives, while the EDFA preamplifier provides the optical gain. Compare this to the NFCF1J1F (same 20km range, DWDM laser, EDFA preamplifier, coherent receiver, but the “F” variant has nuclear-hardened components rated for 1 Mrad). The 1J1G adds deep-space hardening—10 Mrad total dose, heavy ion tolerance, and solar flare event logging. This is the board for customers who need the range and the highest possible radiation tolerance—beyond nuclear to deep-space extremes.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the 1J1G and the 1J1F?
The “G” suffix adds deep-space hardening: 10 Mrad total dose versus 1 Mrad, heavy ion tolerance (LET >100 MeV·cm²/mg), and solar flare event logging. The “F” is nuclear-hardened; the “G” is deep-space hardened. The physics is identical—same 20km range, EDFA, coherent receiver, and diagnostics. The “G” is designed to survive deep-space radiation environments; the “F” is designed to survive nuclear environments.

What’s the heavy ion event LED?
The Heavy Ion Event LED indicates that the board has detected a heavy ion event—a galactic cosmic ray striking the board. Heavy ions can cause single-event effects in the FPGA and memory. The board logs heavy ion events and can recover from them. This is a feature of the “G” suffix—the “F” variant doesn’t have heavy ion detection.

What’s the solar flare event LED?
The Solar Flare Event LED indicates that the board has detected a solar flare event—a burst of radiation from the sun. Solar flares are a separate category from general radiation events. The board logs solar flare events and can adjust its operating parameters to survive the event. This is a feature of the “G” suffix.

What firmware do I need for this board?
The EDFA, coherent receiver, and heavy ion/solar flare event logging require custom firmware v4.5 or later. We include the custom firmware EPROMs with every board. We recommend we do the upgrade in-house before shipping.

Is the EDFA safe to work with?
The EDFA contains a 980nm pump laser that outputs up to 100mW. This is Class 3B—dangerous to eyes and skin. The board has an interlock that disables the pump laser if the fiber connector is disconnected. Never defeat the interlock.

Can I use this board with a standard NFCF at the other end?
No. The 1J1G uses a 1550nm DWDM laser, EDFA, and coherent receiver. The standard NFCF uses 850nm LED. They won’t communicate. Both ends need to be 1J1G (or 1J1F, 1J1E, or 1L1G) boards.

What’s the most common failure mode on the NFCF1J1G?
We’ve handled very few. The most common failure is the EDFA pump laser—it can degrade over time. The EDFA Pump Current LED gives you advance warning. The coherent receiver’s lock can drift in extreme temperature cycling, but the temperature-compensated power tracking should compensate.

What’s your warranty and lead time?
The NFCF1J1G is a rare board. Lead time is 3-5 business days. We offer a 2-year warranty. We test every board with a 48-hour burn-in, a fiber optic loopback test (with a spool of 20km 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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