Cheap SD CVBS AV Video Transmitter Receiver for FPV Drones

Cheap SD CVBS AV Video Transmitter Receiver for FPV Drones

COFDM Wireless Video Transmitter & Receiver – Long-Range, Secure, Low-Latency

Introduction

The COFDM-912T Wireless Video Transmitter and Receiver system is a professional-grade solution designed for long-range, real-time video and data transmission. Built on advanced COFDM (Coded Orthogonal Frequency Division Multiplexing) modulation technology and high-performance MPEG-2/H.264 video compression, this system delivers stable, interference-resistant, and encrypted digital video links for UAVs, UGVs, security monitoring, military reconnaissance, live broadcasting, and other demanding applications.

Unlike conventional analog systems, COFDM technology ensures reliable video quality in both Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) conditions, even in complex environments such as urban areas, forests, and mountainous terrain. With integrated PA (Power Amplifier) modules of 1W or 2W, the system can achieve transmission distances of up to 30 km LOS and 1.5 km NLOS, making it a cost-effective yet powerful option for long-range wireless communication.

Compact in design, rugged in structure, and easy to deploy, the COFDM-912T is available as a complete set (transmitter, receiver, antennas, and cables) and supports both CVBS AV input and HDMI output, ensuring broad compatibility with a wide range of cameras and display devices. Whether used for FPV drone video links, live event broadcasting, or covert surveillance operations, this wireless transmission system offers secure, low-latency, and reliable performance in every scenario.

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Key Features

• Advanced COFDM Modulation
  Provides robust performance against multipath interference, enabling clear video transmission in both LOS and NLOS environments.

• AES-128 Video Encryption
  Built-in secure encryption ensures that your video data is protected against unauthorized access or interception.

• Long Transmission Range

  • Up to 30 km LOS (Line-of-Sight) with a 2W power amplifier.

  • Up to 1.5 km NLOS (Non-Line-of-Sight) in urban or obstructed environments.

• Low Latency Video Transmission
  End-to-end latency of 200–300 ms, suitable for FPV, UAV control, and live monitoring applications.

• Dual Input & Output

  • Transmitter: CVBS (AV) analog input.

  • Receiver: AV (CVBS) + HDMI digital output.

• Video + Data Downlink
  Supports simultaneous video transmission and transparent UART data downlink, enabling telemetry or sensor data transfer from the transmitter to the receiver.

• Configurable Frequency
  Frequency can be modified via a parameter configuration board, supporting custom frequencies within 170–860 MHz range.

• Multiple Modulation & Bandwidth Options
  Supports QPSK, 16QAM, and 64QAM modulation with adjustable bandwidths from 2 MHz to 8 MHz.

• Compact & Lightweight Design
  Small form factor with rugged aluminum housing for easy integration into UAVs, vehicles, or portable systems.

• Full Set Package
  Includes transmitter, receiver, antennas, and cables, ready for immediate deployment.

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Specifications

Transmitter (COFDM-912T)

• Operating Voltage: DC 11V ~ 13V (20W PA requires 24V–28V)

• Current Consumption: ≤1.5A @ 12V (2W PA)

• Video Input: CVBS composite video (PAL by default, NTSC optional)

• Video Encoding: MPEG-2 / H.264

• Resolution: 720×576 @ ≥4 Mbps stream

• Data Interface: UART one-way transparent transmission

• Baud Rates: 1200 to 230400 bps

• Encryption: AES-128 supported

• Modulation Mapping: QPSK, 16QAM, 64QAM

• Forward Error Correction (FEC): 1/2, 2/3, 3/4, 5/6, 7/8

• Carriers: 2K

• Frequency Range: 170–860 MHz (customizable; stock 300 MHz & 600 MHz models)

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

• Transmission Power: 1W or 2W (5W/10W/20W optional)

• Dimensions: 90 × 65 × 22 mm

• Housing: Aluminum, anti-corrosion, shockproof

Receiver

• Operating Voltage: DC 12V <0.3A

• RF Input Range: 170–860 MHz

• Bandwidth: 2–8 MHz adjustable

• RF Input Level: -98 dBm ~ 0 dBm (depending on bandwidth)

• Input Impedance: 50 Ω (SMA female)

• Demodulation: COFDM

• Constellation Modes: QPSK, 16QAM, 64QAM

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

• Output Video: CVBS (3.5mm AV), HDMI

• Resolution: 720×576 @ 6 MHz

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

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Applications

• Unmanned Aerial Vehicles (UAVs / Drones)
  Real-time FPV video streaming from drones to ground stations. Recommended with optional band-pass wave filters for improved anti-interference.

• Unmanned Ground Vehicles (UGVs) & Robotics
  Provides wireless video feedback and telemetry data in complex ground operations.

• Security & Law Enforcement
  Ideal for covert surveillance, tactical reconnaissance, and border monitoring, thanks to its compact size and encryption support.

• Broadcasting & Live Events
  Used in sports broadcasting, outdoor live events, and news reporting to transmit high-quality video over long distances.

• Marine & Mountainous Environments
  Reliable performance in challenging terrains where standard RF systems fail.

• Military & Public Safety
  Deployed in field reconnaissance, emergency response, and disaster recovery, providing stable video feeds under harsh conditions.

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Customizable Options

• Frequency Band Customization
  Available in 170–860 MHz range, with support for specific customer-requested frequencies such as 260 MHz, 450 MHz, 610 MHz, 970 MHz, 1180 MHz, 1230 MHz, etc.

• Power Amplifier Options
  Standard: 1W or 2W.
  Optional upgrades: 5W, 10W, 20W for extended range applications.

• Video Input/Output Formats

  • PAL (default)

  • NTSC (optional upon request)

  • HDMI input (available in higher models)

• Relay Transmission Solutions
  Integration with vehicle-mounted or portable relay systems to extend coverage beyond 30 km.

• Antenna Options

  • Omni-directional fiberglass antennas for general use.

  • High-gain directional antennas for maximum range.

• Data Transmission
  Supports UART telemetry data + video in one system (simplex, downlink only).

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Advantages Over Conventional Systems

1. Cheaper Yet Longer Range – Compared with traditional analog transmitters or IP mesh systems, COFDM provides higher stability at a lower cost.

2. Strong NLOS Capability – Works effectively in urban blocks, forests, and moving vehicles where other systems fail.

3. Compact and Lightweight – Ideal for UAV integration, with transmitter weights as low as 154 grams.

4. Integrated Signal Monitoring – Receiver’s built-in screen displays signal strength, helping users adjust antenna positioning for optimal performance.

5. Expandable Solutions – From small portable UAV sets to high-power vehicle relay systems, scalable to meet any professional need.

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Safety & Usage Warnings

• Always connect the antenna before powering on the transmitter to avoid damaging the PA (Power Amplifier).

• Place antennas in elevated and unobstructed locations for the best performance.

• Maintain proper antenna height difference between transmitter and receiver for improved link stability.

• Do not block antennas during operation to prevent signal attenuation.

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Package Includes

• 1 × COFDM Transmitter

• 1 × COFDM Receiver

• 2 × Antennas (TX & RX side)

• 1 × Accessories Cable Set

 

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Conclusion

The COFDM-912T Wireless Video Transmitter & Receiver system combines long-distance performance, robust encryption, and flexible customization, making it an ideal solution for UAV, security, and broadcasting applications. Its small size, low latency, and reliable COFDM modulation set it apart from conventional video transmission systems, ensuring professional users get a cost-effective, stable, and secure wireless link in both LOS and NLOS conditions.

With multiple frequency, power, and input/output options available, the COFDM-912T can be tailored to meet diverse application requirements. Whether you need 10 km for drone FPV, 30 km for air-to-ground video, or relay systems for ultra-long range, this product delivers performance that is both cheaper and longer-lasting.

FAQ

Q1: How does Point-to-Multipoint (P2MP) work, and how many receivers can connect to one transmitter?

A: Our COFDM video transmission system operates in a broadcast mode, similar to a TV broadcasting station. One transmitter can send the same wireless signal to multiple receivers simultaneously.

As long as the receivers are within the effective signal coverage area and configured to the same frequency and parameters, they can all receive the signal at the same time.
In theory, there is no fixed limit to the number of receivers; therefore, the maximum number cannot be precisely specified and depends on practical deployment conditions.

Q2: Is the IVCAN COFDM system compatible with third-party or existing transmitters and receivers?

A: Compatibility depends on multiple technical factors, including frequency, bandwidth, modulation, and transmission protocol. Without detailed specifications or actual testing, compatibility with third-party or existing equipment cannot be confirmed. To ensure accurate results, compatibility testing is required before we can provide a definitive answer.

Customers are welcome to share detailed technical information about their existing devices so we can evaluate potential compatibility or recommend appropriate testing solutions.