in Drones, Robotics

Video Transmitters for FPV Drones

by Ashish Chatterjee February 25, 2025, 9:27 pm

Introduction

A video transmitter (VTX) is a crucial component of an FPV drone, responsible for transmitting real-time video feed from the drone’s camera to FPV goggles or monitors. Video transmitters come in both analog and digital formats, each with its own advantages.

Types of Video Transmitters

1. Analog VTX

Uses radio frequency transmission.
Lower latency, ideal for racing.
Prone to signal interference.
Common frequencies: 5.8GHz (most popular), 2.4GHz, and 1.2GHz.

SpeedyBee TX800

Speedy Bee 5.8 GHz Antenna V2

Specifications

Product Name	Speedy Bee 5.8 GHz Antenna V2
Frequency range	5.5-6.0 GHz
Gain	2.8dBi
Axial Ratio	<1.0
Weight	8.2g3.7g4.27g4.3g
Dimensions	2070mm2087mm2087mm2088mm
Connector	SMAUFLMMCXMMCX-L
Polarization	RHCP
SWR	<1.1 (On 5.8GHz)
Color	Yellow+Black

More Details Visit : https://www.speedybee.com/speedy-bee-5-8-ghz-antenna-v2/

2. Digital VTX (DJI, Walksnail, HDZero)

Offers high-definition video with minimal interference.
Slightly higher latency than analog (except HDZero, which has low latency).
Requires compatible digital FPV goggles.

VTX Power Levels

Power Output	Range (Approx.)	Best Use Case
25mW	200-500m	Indoor, short-range flying
200mW	1-2 km	Freestyle, park flying
800mW+	5+ km	Long-range flights

Circuit Diagram for VTX Connection

(Include diagram showing VTX connection to flight controller, camera, and power source)

Choosing the Right VTX

Flight Style – Racing drones prefer low-latency analog VTX; long-range drones benefit from high-power VTX.
Goggle Compatibility – Ensure your goggles support the chosen VTX system.
Power Output & Antennas – Higher power increases range, but proper antennas improve signal strength.

Conclusion

Selecting the right video transmitter ensures a seamless FPV experience, reducing signal loss and enhancing video quality for an immersive flight experience.