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, Émetteur-récepteur sans fil d'émetteur-récepteur de transmission vidéo d'image de HDMI COFDM, and with recevier we need to use with this items?
UN: I will send to your email
Q: thanks
UN: Vérifiez s'il vous plaît, 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? 10km?
UN: I will reply you soon
this antenna
COFDM-221R HD Wireless Video Receiver COFDM AV 1080P Transmission image Transceiver CVBS 170~900Mhz
this is receiver
Q: receiver for 903T?
UN: for 902t 903t 904t
Q: ok but for COFDM-904T TX and RX is included in price?
UN: 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?
UN: 10km ok, from air to ground
Q: yes that is what i need, what is the difference between 902 et 904 ?
UN: customer installed antenna for receiver
COFDM-902T and COFDM-904T almost same, but COFDM-904T is more reliable,
Q: i dont see HDMi input on COFDM-904T
UN: 904 has hdmi
Q: not on the pictures
UN: I will check and send you soon.
one customer tested sample and place repeat order soon
Please check your email for HDMI input
Q: d'accord .. the pictures on your website is no up to date
UN: Oui
Q: I see on your picture hdmi now.
UN: website picture is only one side
Q: Could you send me picture of your RX?
UN: 
this is RX
Q: we are interested to by 4-5 Émission… is it working all with one RX if it’s not working in same time
UN: 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…
UN: now antenna is 1 mètre, for sample is ok, what is your post code? I will check shipping cost
Q: 1823 Glion Switzerland
UN: what frequency do you need? or use our default?
Q: what is our choice for 904?
UN: 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 Émission?
UN: 904t default frequency is 503Mhz, 503, 509, 515, 521Mhz to switch loop, not including battery
Q: le 902 is 170mhz?
UN: From 170Mhz~900Mhz, what you need, we can modify, Box size is 20 X 10 x 5mm
buy video transmitter
Q: d'accord. I need to check the law of government if this frequency is ok and i contact you soon after… is it available in stock’
UN: 3~7 days to modify the frequency, need test long time, frequency different, Pennsylvanie (agrandisseur) hardware also need change
Q: d'accord. let me check frequency and i come back to you soon
UN: Oui, it is very important
Table des matières
Aperçu
le COFDM Wireless Video Transmitter and Receiver System est un appareil performant, long-range video transmission solution specifically designed for drones, drones, mobile vehicles, radiodiffusion, and professional field applications. En utilisant Multiplexage par répartition orthogonale de la fréquence codée (COFDM) technologie, this system provides écurie, real-time high-definition (HD) video and audio transmission over long distances, même en cas de défi hors ligne de vue (NLOS) environnements.
With support for multiple video input formats including HDMI, IDS, and CVBS composite video, the system is versatile and compatible with a wide range of cameras, caméscopes, and drones. Coupled with high-quality H.264/MPEG-2 compression, the COFDM system ensures clear, smooth images with accurate color reproduction, minimal artifacts, et latence ultra faible suitable for live monitoring, UAV reconnaissance, inspections industrielles, et diffusion.
This system is ideal for professional users seeking sécurisé, fiable, and configurable wireless video links. The transmitter and receiver can be customized to specific frequency ranges, transmission distances, and power requirements, assurer regulatory compliance and optimized performance for each project.
Principales caractéristiques
- High-Definition Real-Time Video Transmission
- HDMI input supports cameras like GoPro, Reflex numérique, 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.
- Modulation COFDM avancée
- COFDM ensures robust performance in multipath, grande vitesse, and interference-prone environments.
- Modulation types: QPSK, 16QAM, 64QAM.
- Fournit une stabilité Transmission sans visibilité directe with strong diffraction and low interference.
- Transmission longue portée
- Ligne de vue (LA) distances exceed 15 km, while ground and NLOS distances typically range from 600 meters to 10 km, depending on antenna configuration and environment.
- Optional high-gain antennas extend the range further for professional deployments.
- Latence ultra-faible
- Transmission delay typically under 300–500ms, assurer real-time feedback for drone operations, événements en direct, or critical monitoring tasks.
- Flexible Frequency and Power Options
- Default frequencies for COFDM-904T: 503 MHz, 509 MHz, 515 MHz, 521 MHz. Custom frequencies from 170 MHz 900 MHz or up to 1 GHz are available.
- Adjustable RF output power from 1W to 5W depending on required transmission distance.
- Wide bandwidth options: 2 MHz, 4 MHz, 6 MHz, 7 MHz, 8 MHz.
- Compact and Rugged Design
- Transmitter size: 20 × 10 × 5 mm (customizable for different models).
- Lightweight and portable, ideal for UAVs, drones, and mobile setups.
- Shock-resistant and vibration-proof for harsh operational environments.
- Multi-Receiver Support
- A single transmitter can stream to multiple receivers operating at different frequencies.
- Receivers compatible include COFDM-221R, COFDM-902T, COFDM-904T, supporting Android, IOS, or portable monitors.
- Security and Encryption
- AES 128-bit encryption ensures secure, private transmission.
- Optional user password protection for authorized access only.
- 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.
- User-Friendly Interface
- Easy-to-use frequency selection via remote control.
- Multiple output options on receivers, y compris HDMI, USB, and Wi-Fi for mobile device connectivity.
Spécifications techniques
| Paramètre | spécification |
|---|---|
| Type de modulation | COFDM (QPSK, 16QAM, 64QAM) |
| Compression vidéo | H.264 / MPEG-2 |
| Entrée vidéo | HDMI, HD-SDI, Composite CVBS |
| Puissance de sortie RF | 1W (défaut), up to 5W optional |
| Fréquence de fonctionnement | 170 MHz- 900 MHz (personnalisable), défaut 503 MHz |
| Bande passante | 2 / 4 / 6 / 7 / 8 MHz |
| Distance de transmission | LA > 15 km, Sol > 1 km, NLOS > 600 m |
| System Delay | ≤300–500 ms |
| Taux d'erreur sur les bits | ≤10^-6 |
| Résolution vidéo | 1080P / 60 fps; backward compatible 720P/480P |
| Le chiffrement | AES128 (facultatif) |
| Dimensions (Émission) | 20 × 10 × 5 mm |
| Poids (Émission) | 0.2 kilos (selon modèle) |
| Alimentation | DC 5V–36V |
Applications
- Drone and UAV Video Transmission
- Real-time HD video for aerial filming, arpentage, cartographie, or search-and-rescue.
- NLOS capability ensures stable transmission in urban or forested environments.
- Broadcasting and Media Production
- Portable or vehicle-mounted live transmission for news reporting, sportif, and events.
- Surveillance industrielle
- Surveillance à distance des pipelines, chantiers de construction, et infrastructures critiques.
- Security and Emergency Response
- Provides live video feeds for police, lutte contre les incendies, or disaster relief operations.
- Mobile Applications
- Vehicle-mounted or handheld units for temporary setups and field monitoring.
Configurations facultatives
- High-Gain Antennas: Extend range up to 20 km or more depending on terrain.
- Personnalisation de la fréquence: 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, fréquence, or interface tailored to project needs.
Ce COFDM Wireless Transmitter and Receiver system offers a polyvalent, solution performante for professionals who require longue portée, real-time HD video transmission with secure and reliable operation. Whether used in UAV applications, surveillance mobile, ou diffusion, this system provides faible latence, high-quality imaging, et des options de déploiement flexibles to meet the most demanding requirements.
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