# Fiber Optic FPV Kit, 3KM, with Sky TX module

- Page: https://sigmanortec.ro/en/fiber-optic-fpv-kit-3km-with-sky-tx-module
- Price: 2572.65 RON
- Availability: In stock; 1-2 zile
- Reference: 88138 · EAN: 5945420916539
- Category: Drones and Radiomodeling > Video
- Specifications: Maximum transmission range: 3 km
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:37 (Europe/Bucharest)

## Description

FPV transmission system via optical fiber for stable and secure connection up to 3 km, ideal in areas with RF interference, tunnels or industrial environments. Includes Sky TX module for drone and ABS deployment box, simultaneously transmits PAL NTSC video and commands via UART, TTL ELRS SBUS compatible, ultra-thin 0.5 mm fiber resistant to bending.
This optical fiber transmission system for FPV drones is an advanced communication solution designed to ensure a stable and secure link between the drone and the ground station over a distance of up to 3 kilometers. The system uses an ultra-thin 0.5mm optical fiber, which allows simultaneous transmission of video signals and control commands, offering a superior alternative to traditional wireless systems in environments with strong electromagnetic interference.
The package includes both the module mounted on the drone (Sky terminal / Transmit Module) and a special box for storing and deploying the fiber during flight.
The optical fiber technology completely eliminates jamming and signal loss issues, making it ideal for critical missions, flights in tunnels, urban canyons, or areas with high RF signal density. Using the optical fiber, for example, underwater robots can be controlled at great depths without control or video stream transmission problems.
The Sky Terminal module (TX module) is connected to the FC (Flight Controller) and receives both the video signal and the TX and RX control serial for drone command, communicating with the ground module (Ground Module) via the optical fiber. The Ground Control module is reusable and sold separately.
Connecting the module to the FC is quite simple, as it is directly compatible with most flight controllers, and the configuration is easy considering the module's compatibility with standard TTL / ELRS / SBUS protocols.
The optical fiber is not reusable, at least the process of repacking it into the tube is difficult.
FOR OPERATION, THE GROUND MODULE IS MANDATORY, a reusable product sold SEPARATELY.
Optical fiber specifications:
Fiber type: G657A2 (bend resistant)
Length: 3km
Box material: ABS
Attenuation: <0.35dB/km at 1310nm, <0.25dB/km at 1550nm
Box size: 90mm diameter x 220mm height
Weight: ~0.5kg
Sky terminal and Ground terminal module specifications:
Processor type: FPGA
Sky terminal power supply: 9-18V DC
Ground terminal power supply: 4S-6S with XT60 connector
Interfaces: UART, Video (PAL/NTSC)
Control protocols: TTL / ELRS / SBUS
Optical wavelength: 1310nm / 1550nm
Sky terminal dimensions: 60 x 35 mm
Sky terminal weight: 10g
Usage:
Mount the Sky terminal module on the drone, connecting it to the flight controller according to the scheme:
Pin
Connection
Details
VCC (9-18V)
Power supply
Supplies the module with 9-18V
GND
Ground
Common ground with the rest of the system
VIDEO
To the VTX channel
Sends the video signal to the VTX
RX
To the TX pin of the controller
Module RX receives from controller TX
TX
To the RX pin of the controller
Module TX sends to controller RX
Connect the optical fiber to the Sky terminal module via the FC interface (Optical Interface), ensuring it is securely fixed.
Prepare the fiber box, checking that the lock is unlocked before flight to allow free deployment of the fiber.
Connect the Ground terminal module to a 4S-6S power source via XT60 and to the FPV monitor/goggles. The Ground Terminal module is sold separately.
Example connection diagram:
Sky terminal TX: