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.
क्यू: Hello could you tell me what is the price of, एचडीएमआई सीओएफडीएम वायरलेस इमेज वीडियो ट्रांसमिशन ट्रांसीवर, and with recevier we need to use with this items?
ए: I will send to your email
क्यू: thanks
ए: Please check, please ask me if you have any question on technology or order
क्यू: 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? 10किमी?
ए: 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
क्यू: receiver for 903T?
ए: for 902t 903t 904t
क्यू: ok but for COFDM-904T TX and RX is included in price?
ए: Price has including antenna, If you agree better antenna, almost USD200 one piece, 902t 904T support 20km
क्यू: COFDM-902T with receiver and good antenna goes at 10km?
ए: 10km ok, हवा से जमीन तक
क्यू: yes that is what i need, what is the difference between 902 और 904 ?
ए: customer installed antenna for receiver
COFDM-902T and COFDM-904T almost same, but COFDM-904T is more reliable,
क्यू: i dont see HDMi input on COFDM-904T
ए: 904 has hdmi
क्यू: not on the pictures
ए: I will check and send you soon.
one customer tested sample and place repeat order soon
Please check your email for HDMI input
क्यू: ठीक है .. the pictures on your website is no up to date
ए: हाँ
क्यू: I see on your picture hdmi now.
ए: website picture is only one side
क्यू: Could you send me picture of your RX?
ए: 
this is RX
क्यू: we are interested to by 4-5 टेक्सास… is it working all with one RX if it’s not working in same time
ए: At different frequency at RX, RX frequency can change by remote control
क्यू: 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…
ए: now antenna is 1 मीटर, for sample is ok, what is your post code? I will check shipping cost
क्यू: 1823 Glion Switzerland
ए: what frequency do you need? or use our default?
क्यू: what is our choice for 904?
ए: shipping cost by DHL, USD69
904T is recommended
902T is also ok
क्यू: You say 904 is better. i choose this one, but which frequency he use? you don’ t give me size of 904 टेक्सास?
ए: 904t default frequency is 503Mhz, 503, 509, 515, 521Mhz to switch loop, not including battery
क्यू: NS 902 is 170mhz?
ए: From 170Mhz~900Mhz, what you need, we can modify, Box size is 20 एक्स 10 x 5mm
buy video transmitter
क्यू: ठीक है. I need to check the law of government if this frequency is ok and i contact you soon after… is it available in stock’
ए: 3~7 days to modify the frequency, need test long time, frequency different, देहात (चित्रवर्धक) hardware also need change
क्यू: ठीक है. let me check frequency and i come back to you soon
ए: हाँ, it is very important
विषयसूची
सिंहावलोकन
NS COFDM Wireless Video Transmitter and Receiver System एक उच्च प्रदर्शन है, long-range video transmission solution specifically designed for यूएवी, ड्रोन, mobile vehicles, प्रसारण, और व्यावसायिक क्षेत्र अनुप्रयोग. का उपयोग करते हुए कोडित ऑर्थोगोनल फ्रीक्वेंसी डिवीजन मल्टीप्लेक्सिंग (COFDM) तकनीकी, this system provides स्थिर, real-time high-definition (एच.डी) video and audio transmission लंबी दूरियों पर, even in challenging गैर लाइन-ऑफ़-साइट (NLOS) वातावरण.
With support for multiple video input formats including HDMI, एसडीआई, and CVBS composite video, the system is versatile and compatible with a wide range of cameras, कैमकोर्डर, and drones. Coupled with high-quality H.264/MPEG-2 compression, the COFDM system ensures clear, smooth images with accurate color reproduction, minimal artifacts, और अति-निम्न विलंबता suitable for live monitoring, UAV reconnaissance, औद्योगिक निरीक्षण, और प्रसारण.
This system is ideal for professional users seeking सुरक्षित, भरोसेमंद, and configurable wireless video links. The transmitter and receiver can be customized to specific frequency ranges, transmission distances, and power requirements, यह सुनिश्चित करना regulatory compliance and optimized performance for each project.
प्रमुख विशेषताऐं
- High-Definition Real-Time Video Transmission
- HDMI input supports cameras like GoPro, dSLR है, 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.
- उन्नत COFDM मॉड्यूलेशन
- COFDM सुनिश्चित करता है robust performance in multipath, high-speed, and interference-prone environments.
- Modulation types: QPSK, 16QAM, 64QAM.
- Provides stable NLOS transmission with strong diffraction and low interference.
- लंबी दूरी का ट्रांसमिशन
- नजर (लॉस) distances exceed 15 किमी, while ground and NLOS distances typically range from 600 meters to 10 किमी, depending on antenna configuration and environment.
- Optional high-gain antennas extend the range further for professional deployments.
- अल्ट्रा-लो विलंबता
- Transmission delay typically under 300–500ms, यह सुनिश्चित करना real-time feedback for drone operations, लाइव इवेंट, or critical monitoring tasks.
- Flexible Frequency and Power Options
- Default frequencies for COFDM-904T: 503 मेगाहर्ट्ज, 509 मेगाहर्ट्ज, 515 मेगाहर्ट्ज, 521 मेगाहर्ट्ज. Custom frequencies from 170 मेगाहर्ट्ज से 900 मेगाहर्ट्ज or up to 1 GHz are available.
- Adjustable RF output power from 1W to 5W depending on required transmission distance.
- Wide bandwidth options: 2 मेगाहर्ट्ज, 4 मेगाहर्ट्ज, 6 मेगाहर्ट्ज, 7 मेगाहर्ट्ज, 8 मेगाहर्ट्ज.
- Compact and Rugged Design
- Transmitter size: 20 × 10 × 5 मिमी (customizable for different models).
- Lightweight and portable, ideal for UAVs, ड्रोन, 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, आईओएस, 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, एचडीएमआई सहित, USB, and Wi-Fi for mobile device connectivity.
तकनीकी निर्देश
| पैरामीटर | विशिष्टता |
|---|---|
| मॉडुलन प्रकार | COFDM (QPSK, 16QAM, 64QAM) |
| वीडियो संपीड़न | 264 / एमपीईजी -2 |
| वीडियो इनपुट | HDMI, एचडी-एसडीआई, सीवीबीएस समग्र |
| आरएफ आउटपुट पावर | 1डब्ल्यू (गलती करना), up to 5W optional |
| परिचालन आवृत्ति | 170 मेगाहर्ट्ज - 900 मेगाहर्ट्ज (अनुकूलन), गलती करना 503 मेगाहर्ट्ज |
| बैंडविड्थ | 2 / 4 / 6 / 7 / 8 मेगाहर्ट्ज |
| Transmission Distance | लॉस > 15 किमी, मैदान > 1 किमी, NLOS > 600 एम |
| System Delay | ≤300–500 ms |
| बिट त्रुटि दर | ≤10^-6 |
| वीडियो संकल्प | 1080पी / 60 एफपीएस; backward compatible 720P/480P |
| एन्क्रिप्शन | एईएस128 (ऐच्छिक) |
| आयाम (टेक्सास) | 20 × 10 × 5 मिमी |
| वजन (टेक्सास) | 0.2 किलोग्राम (मॉडल पर निर्भर करता है) |
| बिजली की आपूर्ति | DC 5V–36V |
अनुप्रयोगों
- Drone and UAV Video Transmission
- Real-time HD video for aerial filming, भूमि की नाप, मानचित्रण, or search-and-rescue.
- NLOS capability ensures stable transmission in urban or forested environments.
- प्रसारण और मीडिया उत्पादन
- Portable or vehicle-mounted live transmission for news reporting, sports, and events.
- औद्योगिक निगरानी
- पाइपलाइनों की दूरस्थ निगरानी, निर्माण स्थल, and critical infrastructure.
- Security and Emergency Response
- Provides live video feeds for police, अग्निशमन, or disaster relief operations.
- Mobile Applications
- Vehicle-mounted or handheld units for temporary setups and field monitoring.
वैकल्पिक विन्यास
- High-Gain Antennas: Extend range up to 20 km or more depending on terrain.
- आवृत्ति अनुकूलन: 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, आवृत्ति, or interface tailored to project needs.
यह COFDM Wireless Transmitter and Receiver system offers a बहुमुखी, उच्च प्रदर्शन समाधान for professionals who require लंबी दूरी, real-time HD video transmission with secure and reliable operation. Whether used in UAV applications, मोबाइल निगरानी, or broadcasting, this system provides कम अव्यक्ता, high-quality imaging, और लचीले परिनियोजन विकल्प to meet the most demanding requirements.
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