COFDM Wireless AV SD 720P Video Transmitter Receiver Transmission encryption NLOS composite CVBS in H.264 COFDM-912

COFDM Wireless AV SD 720P Video Transmitter

COFDM Wireless AV SD 720P Video Transmitter Receiver Transmission composite CVBS in H.264 COFDM-912

Selling Points

Support Encryption

1W RF output;

SD 720P composite CVBS in

Support NLOS LOS transmission

H.264/MPEG-2;

Delay <300 Millisecond;

Feature

1. Highly integrated, modular design
2. Adopt COFDM.cn modulation technology, MPEG-2 image compression technology
3. All-round communication, not afraid of building walls
4. High-speed inter-line communication, real-time, stable DVD image quality for audio/video transmission
5. Heat sink aluminum housing, shockproof and shock-resistant
6. High fidelity digital stereo transmission
7. Non-line-of-sight (NLOS) mobile transmission for longer distance

Applications

This product is mainly used for technical reconnaissance and forensics in the military and security inspection departments. Radio and television broadcast, radio and television live broadcast: broadcasting field, sports broadcast, social news, aerial live, studio, mountain adventure and so on. It is suitable for real-time mobile transmission of high-quality images in many complex environments such as urban, marine and mountainous.

For drone ( recommend to add extra wave filters, need extra cost )

For CCTV

Specification

Receiver:

FAQ

Gallery

Do you have any questions, please click here to ask a question.

COFDM Wireless AV SD 720P Video Transmitter and Receiver System – Secure, Stable, and Long-Range Wireless Image Transmission

The COFDM Wireless AV SD 720P Video Transmitter and Receiver System (Model COFDM-912) is a professional-grade wireless communication solution designed for secure, real-time, and high-quality video transmission in demanding environments. Featuring advanced COFDM modulation, H.264/MPEG-2 video compression, and a robust all-aluminum housing, this system ensures reliable performance whether operating in urban areas full of obstacles, mountainous terrains, marine environments, or open-air drone applications. With a 1W RF output power and support for both LOS (Line-of-Sight) and NLOS (Non-Line-of-Sight) transmission, it provides a versatile and stable link where conventional analog or digital systems fail.

This transmitter and receiver set is ideal for military reconnaissance, public security, live broadcasting, law enforcement, UAV (drone) missions, emergency rescue, technical surveillance, and mobile video operations where stability, encryption, and image fidelity are crucial.

Key Selling Points

• Secure & Encrypted Transmission – Supports 128-bit encryption to safeguard sensitive video and data against interception.

• 1W RF Output Power – Reliable signal penetration for both long-distance LOS and obstacle-rich NLOS environments.

• High-Quality SD 720P Video – Composite CVBS input for delivering stable 720×576 resolution video with clarity suitable for forensic and broadcast applications.

• Low Latency Performance – Transmission delay <300ms, ensuring real-time responsiveness for live operations and tactical use.

• Flexible Modulation – Supports QPSK (4QAM), 16QAM, and 64QAM with adjustable FEC (Forward Error Correction) for optimized balance between stability and bandwidth.

• Wide Frequency Options – Standard frequency ranges include 290–310MHz (urban penetration) and 590–610MHz (drone operations), with customizable options across 170–860MHz.

Core Features

1. COFDM Modulation Technology

   • Unlike single-carrier transmission, COFDM divides data into multiple subcarriers, enabling robust communication even in the presence of multipath interference, signal fading, and high mobility. This ensures reliable video and audio links in urban areas, forests, tunnels, and rugged landscapes.

2. MPEG-2 / H.264 Video Compression

   • Delivers stable DVD-level video quality with reduced bandwidth requirements. Ensures smooth video streaming while maintaining 720P SD clarity.

3. All-Terrain Communication

   • Designed for NLOS conditions where walls, buildings, or natural barriers are present. The system’s resilience makes it well-suited for military reconnaissance, emergency operations, and law enforcement monitoring.

4. Low Latency Transmission (<300ms)

   • Critical for real-time applications such as drone piloting, live broadcasting, and tactical surveillance where instant feedback is vital.

5. Durable Industrial Housing

   • Built with a heat-sink aluminum chassis that is anti-corrosion, shock-resistant, and thermally efficient, allowing the transmitter to perform reliably in harsh field environments.

6. High-Fidelity Audio and Video

   • Supports stereo audio transmission with synchronized, interference-resistant performance, making it equally suitable for live broadcasts and mobile AV capture.

Technical Specifications

Transmitter (COFDM-912T)

• Operating Voltage: DC 11V – 13V

• Working Current: ≤1.5A @ 12V

• Data Transmission: Transparent serial port, 8-bit data, 1 stop bit, supports baud rates from 1200 to 230400

• Encryption: 128-bit secure encryption

• Modulation Modes: QPSK (4QAM), 16QAM, 64QAM

• FEC Options: 1/2, 2/3, 3/4, 5/6, 7/8

• Carriers: 2K

• Guard Intervals: 1/32, 1/16, 1/8, 1/4

• Bandwidth: Adjustable 2/3/4/5/6/7/8MHz

• Bitrate Range: 2000 kbps – 20000 kbps

• Transmit Power: 1W

• Frequency Range:

  • Standard 290–310MHz for dense obstacles (urban/ground use)

  • Standard 590–610MHz for aerial LOS/NLOS balance (drone operations)

  • Customizable between 170–860MHz

• Power Flatness: <0.2dB over 10MHz in-band

• Second Harmonic: ≤ -45dB

• MER (Modulation Error Ratio): 32dB

• Input Video: 1Vp-p, 75 ohms (CVBS via RCA)

• Video Encoding: MPEG-2, H.264 optional

• Image Quality: 720×576 resolution at >4Mbps bitrate

• Video Formats: PAL/NTSC selectable

• Chassis: Full aluminum housing with radiator design

Receiver (COFDM-912R)

• Frequency Range: 170–860MHz (VHF & UHF)

• Bandwidth: Adjustable 2/3/4/5/6/7/8MHz

• RF Input Level:

  • -94dBm to 0dBm @ 8MHz

  • -98dBm to 0dBm @ 2MHz

• Input Impedance: 50 ohms

• Connector: SMA Female

• Demodulation: COFDM

• Constellation Options: QPSK, 16QAM, 64QAM

• FEC Options: 1/2, 2/3, 3/4, 5/6, 7/8

• Carriers: 2K

• Guard Interval Options: 1/32, 1/16, 1/8, 1/4

• Video Decoding: MPEG-2MP@ML

• Aspect Ratio: 4:3 or 16:9

• Video Resolution: 720×576@6MHz

• Audio/Video Output: Standard 3.5mm AV interface

• Operating Voltage: DC 12V <0.3A

• Operating Temperature: -20°C ~ +50°C

Applications

The COFDM-912 AV SD 720P Video Transmission System has a wide range of uses across industries where stability, mobility, and security are critical:

• Military & Law Enforcement: Tactical reconnaissance, mobile surveillance, covert monitoring, and real-time forensic evidence collection.

• Broadcasting: Live sports events, news gathering, outdoor studio links, and aerial video feeds.

• Emergency Services: Disaster response, search and rescue operations, fire control, and field command communication.

• UAV / Drone Systems: Aerial image transmission with optional RF filtering for clearer signals.

• Security Monitoring: Mobile CCTV integration and large-area security coverage.

• Adventure & Exploration: Mountain expeditions, marine navigation, and outdoor filming.

Advantages Over Conventional Wireless Systems

• Handles Multipath Interference: Unlike analog or single-carrier digital systems, COFDM ensures transmission remains stable even with reflections, barriers, and movement.

• Encryption-Ready for Sensitive Data: Ensures that military, police, or broadcasting footage cannot be intercepted.

• High Mobility: Supports real-time, stable video quality even while on the move—ideal for drones, vehicles, or body-worn setups.

• Flexible Frequency Selection: Adjustable to meet different regional frequency regulations and application requirements.

• Scalable & Customizable: Options available for custom power outputs, extended range, and integration with existing AV systems.

Packaging & Accessories

• 1 × COFDM-912T Transmitter Module

• 1 × COFDM-912R Receiver Module

• 2 × High-Gain SMA Antennas

• 1 × Configure Board for Transmitter

• 1 × Configure Board for Receiver

• RCA/AV cables, Power Adapters, and optional drone-specific RF filters (extra cost)

Conclusion

The COFDM Wireless AV SD 720P Video Transmitter and Receiver System (COFDM-912) is a field-proven, professional-grade wireless transmission solution that combines advanced digital modulation, robust security, and rugged design. Whether used in law enforcement, military operations, live broadcasting, UAV flights, or emergency rescue, it ensures real-time, reliable, and interference-resistant video and audio links across challenging terrains and environments.

With its high integration, low-latency performance, and flexible frequency support, it stands as one of the most versatile wireless AV systems available today.