COFDM-T903T HDMI COFDM Wireless Transmitter for living Video audio Transmission

COFDM Wireless  transmitter

COFDM-T903T HDMI COFDM Wireless Image Video Transmission transmitter Transceiver

Selling Points

• Air To Ground>15 km (LOS, UAV, Drone)
• Ground Distance>1 km (LOS)
• Ground Distance>600 Meters (NLOS)
• 300Mhz~1000Mhz;
• HDMI 1080P input;
• Delay < 300ms ;
• 1~5W RF output;

Advantage

• Machine small size, lightweight, tailored for the UAV
• Excellent anti-jamming capability and non-line-of-sight diffraction ability
• Clear picture quality, high-definition 1080P effect
• The real-time image is clear and smooth

Specification

Working frequency	300MHz～1000MHz (Frequency customization)
Radiofrequency power	≤28dBm
Bandwidth	2/4/6/7/8MHz
FEC	1/2，2/3，3/4，5/6，7/8
Protection Interval	1/32，1/16，1/8，1/4
Code stream	2Mbps～16Mbps
Time delay	≤300ms
Bit error rate	≤10-6
Transmission Distance	Ground distance> 1 km; Air to ground> 15 km;Non-line of sight> 600 meters
Audio Video Interfaces	HDMI
Encryption	AES128
Image clarity	1920*1080P
Image frame rate	60，50,48,30,25,24fps
power supply	DC10-15V
Dimensions	L118*W66*H22mm
Weight	180g

Packaging List

• Tiny transmitter 1pc
• Receiver 1pc
• Transmitter Power cable 1pc
• Transmitter Antena 1 piece
• Receiver Antenna 2 pieces
• RF extended cable 2 pieces

Gallery

Overview

The COFDM-T903T is a high-performance, professional-grade HDMI wireless video transmitter designed for real-time HD video transmission over long distances. Leveraging COFDM (Coded Orthogonal Frequency Division Multiplexing) technology, it provides robust and interference-resistant video transmission, even in challenging environments with high multipath interference or non-line-of-sight (NLOS) conditions.

With a compact design (118 × 66 × 22 mm) and lightweight construction (180g), the COFDM-T903T is optimized for UAVs, drones, mobile vehicles, and portable broadcasting setups, where space, weight, and performance are critical. Its HDMI input interface supports up to 1080P Full HD video, with frame rates ranging from 24 fps to 60 fps, providing clear, smooth, and real-time imagery.

Equipped with adjustable RF output power from 1 to 5W, the COFDM-T903T ensures long-distance transmission, capable of air-to-ground distances over 15 km (line-of-sight) and ground-to-ground distances exceeding 1 km (LOS). Even under NLOS conditions, it can transmit reliable video signals over 600 meters, making it ideal for UAV reconnaissance, drone inspections, and mobile broadcasting in complex terrains.

The transmitter features AES-128 encryption for secure video transmission, ensuring private and confidential data protection during critical operations. With low latency (<300 ms), COFDM-T903T delivers real-time monitoring and control, making it suitable for emergency response, live broadcasting, and industrial inspection applications.

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Key Advantages

1. Extended Transmission Distance
   • Line-of-sight (LOS) transmission: over 15 km in air-to-ground scenarios, ideal for UAV and drone applications.
   • Ground distance: exceeds 1 km for LOS applications.
   • Non-line-of-sight (NLOS) transmission: up to 600 meters, thanks to strong diffraction capabilities of COFDM technology.
2. High Definition and Real-Time Video
   • Supports 1080P HDMI video input for high-quality imagery.
   • Frame rates from 24 to 60 fps ensure smooth motion capture, suitable for drone surveillance and live events.
   • Low-latency transmission of less than 300 milliseconds for real-time monitoring and command.
3. Compact, Lightweight, and Rugged
   • Dimensions: 118 × 66 × 22 mm; Weight: 180g.
   • Small form factor designed specifically for UAVs, drones, and mobile platforms.
   • Rugged construction ensures reliability under vibration and shock during airborne or mobile operation.
4. Robust Anti-Jamming and NLOS Capability
   • COFDM modulation offers superior resistance to multipath interference and signal fading.
   • Excellent NLOS diffraction allows stable video even when direct line-of-sight is obstructed.
5. Flexible Frequency Range and Bandwidth
   • Working frequency: 300 MHz – 1000 MHz, customizable according to user requirements.
   • Channel bandwidth: 2/4/6/7/8 MHz to adapt to different transmission environments and regulatory standards.
6. Adjustable RF Output and Encryption
   • RF output power: ≤28 dBm (1–5W), configurable to suit transmission distance requirements.
   • AES-128 encryption ensures secure video transmission and prevents unauthorized access.
7. Professional Video Processing
   • High-quality video coding using H.264 and MPEG-2 standards, providing efficient compression without compromising image clarity.
   • Bitstream: 2–16 Mbps to balance bandwidth usage and video quality.
   • FEC (Forward Error Correction) ratios: 1/2, 2/3, 3/4, 5/6, 7/8, improving transmission reliability.
   • Guard intervals: 1/32, 1/16, 1/8, 1/4 to reduce inter-symbol interference during high-speed transmission.
8. Power and Connectivity
   • Operates on DC 10–15V power supply, suitable for UAVs, drones, vehicles, and portable applications.
   • HDMI input interface supports high-definition video and audio, ready for GoPro or other HD cameras.

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Technical Specifications

Parameter	Specification
Working Frequency	300 MHz – 1000 MHz (customizable)
RF Output Power	≤28 dBm (1–5W adjustable)
Channel Bandwidth	2/4/6/7/8 MHz
Forward Error Correction	1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval	1/32, 1/16, 1/8, 1/4
Bit Stream	2 Mbps – 16 Mbps
Transmission Delay	≤300 ms
Bit Error Rate (BER)	≤10^-6
Transmission Distance	LOS: >15 km (Air-to-Ground), >1 km (Ground), NLOS: >600 m
Video Input	HDMI 1080P
Encryption	AES-128
Image Resolution	1920 × 1080 P
Frame Rate	24/25/30/48/50/60 fps
Power Supply	DC 10–15 V
Dimensions	118 × 66 × 22 mm
Weight	180 g

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Applications

The COFDM-T903T is suitable for a wide array of professional applications where high-quality, low-latency wireless video transmission is required:

1. UAV/Drone Aerial Transmission
   • Perfect for UAV reconnaissance, aerial photography, surveying, mapping, and agricultural monitoring.
   • Long-range transmission supports both LOS and NLOS operations in complex terrains.
2. Mobile and Vehicle-Based Video Transmission
   • Compatible with mobile news broadcasting vehicles, live event coverage, and mobile command centers.
   • Small size and lightweight design allow integration into compact setups.
3. Public Safety and Security
   • Ideal for law enforcement, fire services, emergency response, and border security.
   • Secure AES-128 encryption ensures that sensitive operations remain confidential.
4. Industrial and Infrastructure Monitoring
   • Monitoring pipelines, construction sites, power stations, and industrial plants.
   • Supports remote, real-time HD video feeds for operational efficiency and safety.
5. Event Broadcasting and Live Production
   • Provides real-time transmission for sports, concerts, and outdoor events.
   • HDMI compatibility ensures seamless integration with professional cameras and production equipment.

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Packaging List

• COFDM-T903T Transmitter: 1 unit
• Receiver: 1 unit
• Transmitter Power Cable: 1 piece
• Transmitter Antenna: 1 piece
• Receiver Antenna: 2 pieces
• RF Extended Cable: 2 pieces

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Optional Features and Customization

• Frequency Customization: Working frequency can be extended beyond 1000 MHz for specialized applications.
• Higher RF Output: Customizable RF power above 5W for extended transmission ranges.
• SDI Input Support: Additional video interface (3G-SDI) for professional broadcast cameras.
• Extended Receiver Options: Multiple types of receivers (HDMI screens, USB/MID mobile devices, WiFi receivers) can be paired simultaneously.
• Advanced Encryption: AES-256 or custom encryption for sensitive operations.
• Vehicle and UAV Adaptations: Custom power connectors, vibration-resistant mountings, or compact integration kits.
• Firmware Upgrades: Receiver and transmitter firmware can be updated for enhanced functionality and future-proofing.

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Conclusion

The COFDM-T903T HDMI COFDM Wireless Transmitter is a versatile, high-performance, and professional-grade solution for HD video transmission in UAVs, mobile broadcasting, public safety, industrial monitoring, and live events. Its long-range transmission capability, NLOS support, and low latency (<300 ms) make it particularly suitable for real-time operations where performance and reliability are critical.

Combining compact size, lightweight construction, HDMI compatibility, AES encryption, and COFDM modulation, the COFDM-T903T ensures crisp, clear, and stable HD video transmission even in complex or challenging RF environments. Its customizable options allow professional operators to adapt the system to specialized applications, from drone aerial reconnaissance to secure mobile video broadcasting.

This transmitter is an essential tool for professionals who require reliable, real-time HD video with superior interference resistance, high-definition clarity, and secure operation. Whether deployed in the air, on vehicles, or in temporary field setups, the COFDM-T903T provides the performance, flexibility, and reliability needed for modern wireless video applications.