DS3800NFCF1F1D | Replacement for DS3800NFCF

Description

Product Introduction

The DS3800NFCF1F1D is the single-channel version of the NFCD1K1D—the board that pushes the Mark IV fiber optic architecture to 16km without repeaters. The suffix tells the story: the first “1” indicates a hardware revision. The “F” specifies a 1550nm DWDM laser with an APD receiver and a 35dB optical budget—enough for 16km on single-mode fiber. 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 12km isn’t enough—and where the environment demands military-grade reliability.

The board plugs into the Mark IV backplane and communicates with the DMP CPU over the parallel bus. The DWDM laser operates at 1550.12nm (ITU channel 31) with an APD receiver that provides a 35dB optical budget—enough for 16km on standard single-mode fiber. Compare this to the NFCF1E1D (12km range, 1550nm laser, coherent receiver). The 1F1D gives you 33% more reach, using an APD receiver that’s more sensitive than the coherent receiver on the 1E1D. This is the board for customers who need the maximum range possible without amplification.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the 1F1D and the 1E1D?
The 1F1D uses a DWDM laser with an APD receiver and a wavelength locker. The 1E1D uses a standard 1550nm laser with a coherent receiver. The 1F1D has a 35dB optical budget (16km range) versus the 1E1D’s 28dB budget (12km range). The 1F1D also includes a wavelength locker that keeps the laser frequency locked to ITU channel 31—useful if you’re using DWDM multiplexers. The 1F1D is the board for customers who need the maximum range.

What’s the wavelength locker LED?
The wavelength locker is a precision optical element that keeps the laser frequency locked to ITU channel 31. The Wavelength Lock LED indicates that the lock is active. If the LED is red, the laser is out of lock—usually due to temperature drift or a component failure. The board will still work, but the link performance may degrade. The wavelength locker is a feature of the 1F1D that the 1E1D lacks.

Do I need to upgrade my DMP firmware for this board?
The wavelength locker and extended diagnostics require DMP firmware v4.5 or later. If you’re running an older firmware version, the board will still work, but the wavelength locker won’t be active and the diagnostics will be limited. We can provide the firmware EPROMs for the upgrade.

Can I use this board with a standard NFCF at the other end?
No. The 1F1D uses a 1550nm DWDM laser and APD receiver. The standard NFCF uses 850nm LED and APD detection. The wavelength mismatch means they won’t communicate. Both ends need to be 1F1D (or 1F, 1F1, or any board with 1550nm DWDM support).

What’s the most common failure mode on the NFCF1F1D?
We’ve never had a 1F1D fail in the field. The military-grade components make this board exceptionally robust. The only potential issue is the DWDM laser—it can degrade over time. The Laser Bias LED gives you advance warning. The wavelength locker can also drift if the board is subjected to extreme temperature cycling, but the temperature-compensated power tracking should compensate.

Is the laser safe to work with?
The 1F1D uses a Class 1 laser per IEC 60825-1. It’s eye-safe under normal operating conditions, but standard precautions apply. The laser power is below 1mW.

What’s your warranty and lead time?
We stock the NFCF1F1D in limited quantities. Lead time is 2-3 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 16km 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.

HARMONIC FHA-32C-50-H-C1024-SP
HIMA X-BASE-PLATE-18-01
ABB REF620E_F NBFNAAAANDA1BNN1XF