Long Range COFDM Video Transmitter With HDMI & AV Input | Secure
UAV Video Link Solution
This advanced long range video transmitter is engineered for
reliable wireless video transmission in demanding environments.
Built with COFDM modulation technology, it delivers stable,
low-latency video links for UAVs, robotics, and mission-critical
applications.
Designed for flexibility, the system supports both HDMI and AV
inputs, enabling seamless integration with a wide range of cameras
and video sources. Whether used for drone surveillance, tactical
operations, or industrial inspection, this transmitter ensures
clear and uninterrupted video streaming over extended distances.
Key Features
- Extended Transmission Range: Optimized for long-distance communication, making it ideal for UAV
video downlink and remote monitoring scenarios.
- COFDM Digital Modulation: Provides strong anti-interference capability and stable signal
performance in complex RF environments.
- Multi-Interface Compatibility: Supports HDMI and AV inputs for high-definition and standard video
sources.
- Low Latency Real-Time Video: Ensures smooth and responsive video transmission for critical
operations.
- Secure Data Transmission: Built-in encryption enhances data protection and prevents
unauthorized access.
- Compact & Durable Design: Lightweight structure with efficient heat dissipation for
continuous operation.

Technical Specifications
Product Information
| Product Name | Long Range COFDM Video Transmitter With HDMI & AV Input | Secure
UAV Video Link Solution |
|---|
| Model Number | HCT531 |
|---|
Modulation Specifications
| Wireless Modulation | COFDM (DVB-T) |
|---|
| Carriers | 2K |
|---|
| Bandwidth | Configurable from 1MHz to 8MHz, step by 1KHz |
|---|
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
|---|
| Guard Interval | 1/32, 1/16, 1/8, 1/4 |
|---|
| Constellation | QPSK, 16QAM, 64QAM |
|---|
| Bitrates | 0.5Mbps to 31.67Mbps |
|---|
RF Specifications
| Transmission Power | 10W (40dBm) or 20W (43dBm) |
|---|
| Frequency | 200MHz~860MHz |
|---|
| Tuning Step Size | 1KHz |
|---|
Video and Audio Specifications
| Video Input | HDMI or CVBS, auto-detected after system start-up. Optional: two
channel video input/encoding/transmit simultaneously |
|---|
| Video Formats | 1080@60P, 1080@50P, 1080@30P, 1080@25P, 1080@24P, 1080@60I,
1080@50I, 1080@30I, 720@60P, 720@50P, 720@30P, 720*480 60I (NTSC),
720*576 50I (PAL) |
|---|
| Video Coding | H.264/H.265 |
|---|
| Audio Input | Embedded HDMI or analog audio |
|---|
| Audio Coding | AAC, 16bit, stereo, 32Kbps |
|---|
| Encryption | AES256 |
|---|
Additional Specifications
| Control Method | Through configuration panel, PC or other devices via Control UART,
comprehensive transmitter settings can be achieved |
|---|
| Storage Temperature Range | -40° to +80°C |
|---|
| Size | 180*136*38mm |
|---|
| Weight | 906g |
|---|
| Input Voltage | 28V |
|---|
Typical Applications
- UAV aerial surveillance and mapping
- Law enforcement and public safety
- Emergency rescue operations
- Industrial inspection and monitoring
- Border and coastal security

Frequently Asked Questions
Does your 10 watts/20 watts COFDM HD video transmitter support
other frequencies, like 1.2G, 1.4G, 1.8G?
The transmitter frequency can be 160MHz~2700MHz, but our COFDM
wireless receiver only supports 170~860MHz. For 1.2G, 1.4G, 1.8G, a
frequency down converter is required at the receiver end.
Does this COFDM HD video transmitter support SDI video input?
Yes, We have COFDM wireless video transmitters support HDMI, SDI,
CVBS AV, IP Ethernet RJ45 and AHD video input.
Why Choose This UAV Video Link Solution?
Compared to conventional wireless systems, this long range video
transmitter offers superior stability, stronger penetration, and
enhanced security. It is a reliable choice for professionals who
require consistent performance in challenging environments.