COFDM Wireless Video HDMI Transmitter
COFDM Wireless Video HDMI Transmitter TX Transmission HDMI HD 1080P CVBS H264 Encoder COFDM-907T
COFDM-907T transmitter is high-speed data transmission device for the high quality video and audio transmission application. In addition to high-quality video and audio requirements of the camera, the encoding stream, channel rate requirements are very high. It can transmit H.264 high-quality codec, the receiver image resolution up to 1920X1080P/60.
Specification
| Encoding | H.264,MPEG-2 |
| Frequency Bands | 170Mhz~930Mhz (adjustable frequency available on request) |
| Modulation Format | COFDM / DVB-T |
| Output Power Amplifier | 1W 2W 5W 10W (Preset in factory before delivery |
| Channel Band Width | 6MHz 7MHz 8MHz |
| Sub code carrier modulation | QPSK, 16QAM, 64QAM |
| Error Code Rate | 1/2;2/3;3/4;5/6;7/8 |
| Guard Interval | 1/32??1/16??1/8??1/4 |
| Video Code stream | 2Mbps??22Mbps |
| System latency | 300 millisecond |
| Transmission Range Application |
Visual range Airborne use maritime application urban Application suburban Application |
| Compression Format | H.264/MPEG-2 |
| Date Input | UART??115200bit/s) |
| Video Input | HDMI, CVBS (video audio) |
| Audio Input | Stereo, AL Left AR right |
| Image Definition | 1080P/I??1920*1080??compatible 720P/I,576P/I,480P/I,SD( frame rate@ 25fram/S) |
| Video Input Interface | 4P 1.25 Ribbon cable interface, HDMI standard interface |
| Input Voltage Range | 10V??35VDC |
| Working Temperature | -20~ 65?? |
| Storage | -40~ 70?? |
| Dimension | 93mm??56mm??23mm(L??W??H) |
| Weight base unit | 80g (With the fan)?Including antenna 138g |
LED and Frequency
| LED Color | Note | Frequency |
| ? 1 0 0 | 1st Green LED always on, tx is working;?2nd and 3rd Blue LED is off | 503Mhz |
| ? 1 1 0 | 1st Green LED always on, tx is working;?2nd Blue LED is on and 3rd Blue LED is off | 509Mhz |
| ? 1 0 1 | 1st Green LED always on, tx is working;?2nd Blue LED is off and 3rd Blue LED is on | 515Mhz |
| ? 1 1 1 | 1st Green LED always on, tx is working;?2nd and 3rd Blue LED is on | 521Mhz |
TX Pin Define
P1. Audio L
P2. Audio R
P3. Video
P4. GND
P5. Vcc
P6. GND
P7. TX
P8. RX
COFDM Wireless Video HDMI Transmitter – COFDM-907T
The COFDM-907T Wireless Video HDMI Transmitter represents the pinnacle of modern digital video transmission technology, designed to deliver ultra-high-quality, low-latency video and audio signals over long distances in challenging environments. This transmitter is a robust solution for applications where reliability, speed, and image clarity are critical, including UAV/drone operations, airborne surveillance, maritime monitoring, urban security systems, and professional video broadcasting. By combining advanced COFDM (Coded Orthogonal Frequency Division Multiplexing) technology with H.264/H.265 high-efficiency encoding, the COFDM-907T ensures that your video streams remain smooth, clear, and uninterrupted, even in high-interference or non-line-of-sight (NLOS) conditions.
Key Features
1. Superior Video and Audio Quality:
The COFDM-907T supports HDMI and CVBS video input, with full HD 1080P resolution at 60 frames per second. It can also handle lower resolutions including 720P, 576P, and 480P, providing full compatibility with a wide range of cameras and recording devices. Audio is transmitted in stereo format (AL Left, AR Right), ensuring clear and synchronized sound alongside video, which is essential for live broadcast, drone cinematography, and real-time surveillance.
2. Advanced Encoding and Compression:
Equipped with H.264 and MPEG-2 encoding, the transmitter compresses video data efficiently while maintaining high visual fidelity. Users can select streaming bitrates from 2Mbps to 22Mbps, enabling a balance between bandwidth efficiency and image quality. This flexibility allows the COFDM-907T to be tailored to different transmission ranges, environmental conditions, and receiver capabilities.
3. Wide Frequency Range and Adjustable Modulation:
The COFDM-907T supports a frequency range from 170 MHz to 930 MHz, making it suitable for multiple regional regulations and transmission scenarios. The modulation formats supported include COFDM and DVB-T, with sub-carrier modulation options such as QPSK, 16QAM, and 64QAM. This wide compatibility ensures reliable operation in congested RF environments and provides robust anti-jamming performance.
4. Flexible Output Power Options:
The transmitter comes with multiple preset RF output power levels (1W, 2W, 5W, 10W), allowing users to choose the optimal range and penetration capability for their application. Factory presets ensure ease of use, while still offering customization for professional setups.
5. Ultra-Low Latency Transmission:
With a system latency as low as 300 milliseconds, the COFDM-907T is ideal for applications requiring real-time video feedback, such as UAV piloting, remote monitoring, and live event broadcasting. The low-latency performance ensures minimal delay between capture and display, providing operators with precise control and situational awareness.
6. Robust Design for Extreme Conditions:
The transmitter operates in temperatures ranging from -20°C to 65°C and can be safely stored between -40°C and 70°C, making it suitable for both indoor and outdoor deployments. Its compact dimensions (93mm x 56mm x 23mm) and lightweight design (80g base unit, 138g including antenna) facilitate easy integration with drones, vehicles, or portable monitoring stations. The rugged casing and fan system enhance durability and heat dissipation, ensuring reliable operation even during extended use.
7. Versatile Application Scenarios:
The COFDM-907T is built for professional and industrial environments, including:
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UAV/Drone Video Transmission: Live HD video feeds from drones for aerial surveillance, mapping, or cinematography.
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Airborne and Maritime Applications: Reliable long-distance video feeds from helicopters, small aircraft, or marine vessels.
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Urban and Suburban Security: Video transmission for public safety, law enforcement, traffic monitoring, and critical infrastructure surveillance.
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Industrial Monitoring: Real-time inspection and monitoring in remote or hazardous locations.
8. Intuitive LED Indicators and Frequency Selection:
The transmitter is equipped with LED indicators that provide instant visual feedback on operational status and frequency selection. The combination of green and blue LEDs allows users to quickly identify the working frequency among multiple pre-configured channels, simplifying setup and monitoring in the field.
9. Easy Connectivity and Integration:
The COFDM-907T offers a variety of input interfaces, including:
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Video Input: HDMI standard interface and 4P 1.25 ribbon cable for CVBS.
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Audio Input: Stereo audio channels (Left/Right).
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Data Input: UART interface at 115200 bps.
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TX/RX Control Pins: Defined pins for external control, audio/video routing, and grounding, making the transmitter highly flexible for integration with existing systems.
Technical Specifications
| Feature | Specification |
|---|---|
| Video Encoding | H.264, MPEG-2 |
| Frequency Bands | 170MHz–930MHz (adjustable) |
| Modulation | COFDM / DVB-T |
| Output Power | 1W / 2W / 5W / 10W |
| Channel Bandwidth | 6MHz / 7MHz / 8MHz |
| Sub-carrier Modulation | QPSK / 16QAM / 64QAM |
| Error Code Rate | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard Interval | 1/32, 1/16, 1/8, 1/4 |
| Video Bitrate | 2Mbps–22Mbps |
| System Latency | 300ms |
| Video Input | HDMI, CVBS |
| Audio Input | Stereo, AL/AR |
| Video Resolution | 1080P, compatible with 720P, 576P, 480P |
| Video Interface | HDMI, 4P 1.25 Ribbon Cable |
| Input Voltage | 10–35VDC |
| Operating Temp | -20°C–65°C |
| Storage Temp | -40°C–70°C |
| Dimensions | 93 x 56 x 23 mm |
| Weight | 80g (base), 138g (with antenna) |
LED Frequency Status Reference
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100: 1st Green LED on, 2nd and 3rd Blue LED off – 503 MHz
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110: 1st Green LED on, 2nd Blue LED on, 3rd Blue LED off – 509 MHz
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101: 1st Green LED on, 2nd Blue LED off, 3rd Blue LED on – 515 MHz
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111: 1st Green LED on, 2nd and 3rd Blue LED on – 521 MHz
Pin Definition
| Pin | Function |
|---|---|
| P1 | Audio L |
| P2 | Audio R |
| P3 | Video |
| P4 | GND |
| P5 | Vcc |
| P6 | GND |
| P7 | TX |
| P8 | RX |
Advantages of COFDM-907T
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High Fidelity Transmission: Ensures crystal-clear HD video with full audio synchronization.
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Reliable in Harsh Environments: Resistant to interference and suitable for UAVs, airborne platforms, maritime vessels, and urban areas.
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Flexible Deployment: Multiple output power options and adjustable frequency range allow for a wide array of professional use cases.
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Real-Time Monitoring: Ultra-low latency ensures operational efficiency in surveillance, piloting, and industrial monitoring.
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Compact and Lightweight: Perfect for portable, airborne, or mobile applications where weight and space are critical.
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Professional-Grade Build: Ruggedized design with extended operating temperatures ensures durability and longevity.
The COFDM-907T Wireless Video HDMI Transmitter is the ultimate solution for high-quality, low-latency video transmission in any professional application. Its combination of advanced COFDM modulation, H.264/MPEG-2 encoding, long-range transmission capabilities, and rugged design makes it indispensable for industries demanding reliability, precision, and clarity. Whether you are operating drones, conducting airborne inspections, monitoring maritime operations, or securing urban environments, the COFDM-907T provides dependable, real-time video transmission that you can trust.
