How to buy video transmitter of COFDM?

How to buy video transmitter of COFDM long-range?

How to buy video Transmitter for your project? Here is one buyer inquiry VCAN for COFDM Video transmitter, Q is buyer’s question, A is VCAN reply, if you are interesting, please read it or ask us any question.
Q:  Hello could you tell me what is the price of, HDMI COFDM Бездротовий передавач зображень і відео Передавач, and with recevier we need to use with this items?
A: I will send to your email
Q: thanks
A: Please check, please ask me if you have any question on technology or order
Q:  For COFDM-903T, is it transmitter and receiver for the price?  if not which receiver we need to use?
For COFDM-904T  TX and RX included…  for TX battery is inside or we need to fix extra battery?
 
With antenna we need to use on the RX for have long range transmission? 10км?
A: I will reply you soon
this antenna
1 2
How to buy video transmitter?
COFDM-221R HD Wireless Video Receiver COFDM AV 1080P Transmission image Transceiver CVBS 170~900Mhz
this is receiver
Q: receiver for 903T?
A: for 902t 903t 904t
Q: ok but for COFDM-904T TX and RX is included in price?
A: Price has including antenna, If you agree better antenna, almost USD200 one piece, 902t 904T support 20km
Q: COFDM-902T with receiver and good antenna goes at 10km?
A: 10km ok, з повітря на землю
Q: yes that is what i need, what is the difference between 902 і 904 ?
A: customer installed antenna for receiver
COFDM Transmitter test
how to buy video transmitter?
COFDM-902T and COFDM-904T almost same, but COFDM-904T is more reliable,
Q: i dont see HDMi input on COFDM-904T
A: 904 has hdmi
Q: not on the pictures
A: I will check and send you soon.
one customer tested sample and place repeat order soon
Video Transmitter COFDM 904T Channel Power 6Mhz Bandwidth 27.8dbm
Please check your email for HDMI input
COFDM 904T has HDMI input
Q: добре .. the pictures on your website is no up to date
A: так
Q: I see on your picture hdmi now.
A: website picture is only one side
Q: Could you send me picture of your RX?
A: buy video transmitter
this is RX
Q: we are interested to by 4-5 TX… is it working all with one RX if it’s not working in same time
A: At different frequency at RX, RX frequency can change by remote control
Q: so i think i will buy one set 904 TX RX with big antenna for long range… if it s working well i will buy 4-5 more TX…
A: now antenna is 1 метр, for sample is ok, what is your post code? I will check shipping cost
Q: 1823 Glion Switzerland
A: what frequency do you need? or use our default?
Q: what is our choice for 904?
A: shipping cost by DHL, USD69
904T is recommended
902T is also ok
Q: You say 904 is better. i choose this one, but which frequency he use? you don’ t give me size of 904 TX?
A: 904t default frequency is 503Mhz, 503, 509, 515, 521Mhz to switch loop, not including battery
Q: The 902 is 170mhz?
A: From 170Mhz~900Mhz, what you need, we can modify, Box size is 20 х 10 x 5mm
buy video transmitter
Q: добре. I need to check the law of government if this frequency is ok and i contact you soon after… is it available  in stock’
A: 3~7 days to modify the frequency, need test long time, frequency different, PA (збільшувач) hardware also need change
Q: добре. let me check frequency and i come back to you soon
A: так, it is very important
If you are interesting on buy video transmitter, будь ласка, не соромтеся контакт with us.

Overview

The COFDM Wireless Video Transmitter and Receiver System is a high-performance, long-range video transmission solution specifically designed for БПЛА, дрони, mobile vehicles, мовлення, і професійні сфери застосування. Використання Кодовано мультиплексування з ортогональним частотним поділом (COFDM) технології, this system provides стабільний, real-time high-definition (HD) video and audio transmission over long distances, even in challenging поза межами прямої видимості (NLOS) середовищ.

With support for multiple video input formats including HDMI, SDI, and CVBS composite video, the system is versatile and compatible with a wide range of cameras, відеокамери, and drones. Coupled with high-quality H.264/MPEG-2 compression, the COFDM system ensures clear, smooth images with accurate color reproduction, minimal artifacts, і наднизька затримка suitable for live monitoring, БПЛА розвідка, промислові перевірки, і радіомовлення.

This system is ideal for professional users seeking безпечний, надійний, and configurable wireless video links. The transmitter and receiver can be customized to specific frequency ranges, transmission distances, and power requirements, забезпечення regulatory compliance and optimized performance for each project.

Key Features

  1. High-Definition Real-Time Video Transmission
    • HDMI input supports cameras like GoPro, DSLR, and professional camcorders.
    • Full HD 1080P and 720P composite CVBS video input supported.
    • H.264/MPEG-2 encoding ensures minimal bandwidth usage without sacrificing image quality.
  2. Advanced COFDM Modulation
    • COFDM ensures robust performance in multipath, високошвидкісний, and interference-prone environments.
    • Modulation types: QPSK, 16QAM, 64QAM.
    • Забезпечує стабільність Передача NLOS with strong diffraction and low interference.
  3. Передача на великі відстані
    • Пряма видимість (LOS) distances exceed 15 км, while ground and NLOS distances typically range from 600 meters to 10 км, depending on antenna configuration and environment.
    • Optional high-gain antennas extend the range further for professional deployments.
  4. Наднизька затримка
    • Transmission delay typically under 300–500ms, забезпечення real-time feedback for drone operations, живі події, or critical monitoring tasks.
  5. Flexible Frequency and Power Options
    • Default frequencies for COFDM-904T: 503 МГц, 509 МГц, 515 МГц, 521 МГц. Custom frequencies from 170 МГц до 900 МГц or up to 1 GHz are available.
    • Adjustable RF output power from 1W to 5W depending on required transmission distance.
    • Wide bandwidth options: 2 МГц, 4 МГц, 6 МГц, 7 МГц, 8 МГц.
  6. Compact and Rugged Design
    • Transmitter size: 20 × 10 × 5 мм (customizable for different models).
    • Lightweight and portable, ideal for UAVs, дрони, and mobile setups.
    • Shock-resistant and vibration-proof for harsh operational environments.
  7. Підтримка кількох приймачів
    • A single transmitter can stream to multiple receivers operating at different frequencies.
    • Receivers compatible include COFDM-221R, COFDM-902T, COFDM-904T, supporting Android, iOS, або портативних моніторів.
  8. Security and Encryption
    • AES 128-bit encryption ensures secure, private transmission.
    • Optional user password protection for authorized access only.
  9. Battery and Power Options
    • Transmitters can be powered via internal batteries (where applicable) or external DC input.
    • Receivers support DC 5V–36V input for vehicle-mounted or portable operation.
  10. Зручний інтерфейс
    • Easy-to-use frequency selection via remote control.
    • Multiple output options on receivers, включаючи HDMI, USB, and Wi-Fi for mobile device connectivity.

Технічні характеристики

Параметрспецифікація
Тип модуляціїCOFDM (QPSK, 16QAM, 64QAM)
Стиснення відеоH.264 / MPEG-2
Відео вхідHDMI, HD-SDI, CVBS композит
Вихідна потужність РЧ1W (за замовчуванням), up to 5W optional
робоча частота170 МГц – 900 МГц (настроюється), за замовчуванням 503 МГц
Пропускна здатність2 / 4 / 6 / 7 / 8 МГц
Transmission DistanceLOS > 15 км, Земля > 1 км, NLOS > 600 м
Системна затримка≤300–500 ms
Рівень бітових помилок≤10^-6
Роздільна здатність відео1080P / 60 fps; зворотна сумісність 720P/480P
шифруванняAES128 (опціональний)
розміри (TX)20 × 10 × 5 мм
вага (TX)0.2 кг (в залежності від моделі)
Power SupplyDC 5V–36V

додатків

  1. Drone and UAV Video Transmission
    • Real-time HD video for aerial filming, геодезія, відображення, or search-and-rescue.
    • NLOS capability ensures stable transmission in urban or forested environments.
  2. Телемовлення та медіавиробництво
    • Portable or vehicle-mounted live transmission for news reporting, спорт, and events.
  3. Промисловий моніторинг
    • Remote monitoring of pipelines, будівельні майданчики, and critical infrastructure.
  4. Security and Emergency Response
    • Provides live video feeds for police, пожежогасіння, or disaster relief operations.
  5. Mobile Applications
    • Vehicle-mounted or handheld units for temporary setups and field monitoring.

Додаткові конфігурації

  • Антени з високим коефіцієнтом посилення: Extend range up to 20 km or more depending on terrain.
  • Frequency Customization: Compliance with local regulations and optimal interference-free operation.
  • Battery Upgrades: Extended battery life for mobile or UAV use.
  • Multiple Receiver Support: Allows several receivers to operate simultaneously on different frequencies.
  • OEM/ODM Solutions: Custom transmitter housing, частота, or interface tailored to project needs.

Це COFDM Wireless Transmitter and Receiver system offers a versatile, high-performance solution for professionals who require дальній, передача HD відео в реальному часі with secure and reliable operation. Whether used in UAV applications, мобільне спостереження, or broadcasting, this system provides низька затримка, high-quality imaging, і гнучкі варіанти розгортання to meet the most demanding requirements.

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