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China COFDM Series Long Distance HD Video Transmission Radio - Top Suppliers & Factory for Drones
The COFDM series long-distance HD video transmission radio, it is very suitable for reconnaissance, public security / fire protection / traffic / emergency rescue, customs border defense / maritime surveillance inspection, real-time broadcast / on-site monitoring, power line inspection / pipeline inspection, plant protection and other drones and unmanned aerial vehicles, industrial and commercial unmanned aerial vehicles Aircraft, high-end consumer drones, it is suitable for high-quality real-time mobile video transmission in complex environments such as urban areas, seas, and mountains.
Characteristic
Long-distance transmission: 1w/5w radio, with a visible distance of 20 kilometers /50 kilometers
Super anti-multipath ability, used in complex operating environment, support high-speed movement. (More than 600 kilometers per hour)
Broadcasting / surveillance level HD video encoding: HDMI/HD-SDI/CVBS adaptive, 4K/1080P/1080i/720P/576P adaptive
Bandwidth 2/4/8MHz adjustable: multi-bandwidth, multi-bit rate, multi-mode
Multiple encryptions to avoid illegal reception
Small modular design: small size, light weight, easy to integrate and use
Low power consumption, low heat
Built-in bidirectional data transmission module: 410-480/840-845/902-928MHz, 3.6-19.2kbps conventional/19.2-230.4kbps frequency hopping, 1-2w, TTL/232/485/422, 3.3-30VDC
Product Lineup
HDMI
1W: more than 20 kilometers
COFDM series-1WT transmitter
(10.8x8.2x2.8cm, 233g)
HDMI
5W: more than 50 kilometers
COFDM series-5WT transmitter
(10.8x9.0x2.8cm, 289g)
HDMI
10W: more than 50 kilometers
COFDM series-10WT transmitter
(19.6x14.6x3.4cm, 990g)
COFDM series-0WR receiver
(13.6x11.7x3.4cm, 425g)
3W: COFDM Ground low delay
CVBS transmitter above 3 km
(6.7x4.8x2.3cm, 80g)
Technical Specifications
| Operating Frequency | 300-350MHz or 560-610MHz (200MHz-2.7GHz can be customized) |
| Transmitting Power | 1W/5/10W |
| Receiving Sensitivity | -106dBm@2MHz |
| Modulation Coding | QPSK/16QAM/64QAM |
| Rf Bandwidth | 2-8MHz adjustable |
| Transmission Stream | 2-20Mbps adaptive |
| Forward Error Correction | 1/2、2/3、3/4、7/8 |
| Protection Interval | 1/4、1/8、1/16、1/32 |
| Carrier Number | 2K |
| Power Flatness | Less than 0.2db in 10MHz band |
| Shoulder Ratio | When the output power is 27 dB, the band to shoulder ratio is better than - 30 dB |
| Second Harmonic | ≤ -65dB |
| Mer | 32dB |
| Transmission Distance |
1w: above 20km 5W: above 50km, 10W: above 100km (sight distance) |
| Video Input |
HDMI/SDI/CVBS: 720x480 60I(NTSC)、720x576 50I(PAL)、720 50P、720 60P、1080 50I、 1080 60I、1080 24P、1080 50P、1080 60P (CVBS video input N/P adaptive) |
| Video Output | HDMI / RJ45 IP simultaneous output |
| Video Stream | 2-20Mbps(H.264/H.265) |
| Video Input Interface | HDMI/CVBS(Low latency) |
| Video Output Interface | HDMI |
| Video Coding Format | H264+(HDMI)/H.265(CVBS） |
| System Delay | Less than 180ms (CVBS end-to-end low latency less than 120ms) |
| Video Delay | Less than 250ms |
| Encryption Method | 128 bit AES encryption |
| Protection Standard | All aluminum radiator shell, anti-rust, shockproof design |
| Operating Temperature/Voltage | -30℃~+70℃、11-16V |
| Operating Current | 1W/Receive/5 W/10W/CVNS 3W Receive: 1.3A/0.35A/2.8A/5.9A/1.7A@12V) |
| Overall Dimension |
1W/Receive/5W/10W/CVBS3W Repeat: 10.8x8.2x2.8 / 13.6x11.7x3.4 / 10.8x9.0x2.8 / 19.6x14.6x3.4 / 6.7x4.8x2.3cm |
| Weight |
1W/Receive/5W/10W/CVBS3W Repeat: 233g/425g/289g/990g/80g |
| Control Interface | Standard RS232 interface, 8-bit data bit, 1-bit stop bit, even-check, baud rate: 19200 |
| Transparent Data Interface | A unidirectional transparent serial port transmission, 8 data bits, 1 stop bit, support odd check, even check, wireless check, baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 |
| Built-In Bidirectional Data Transmission Module |
410-480/840-845/902-928MHz, 3.6-19.2kbps conventional/ 19.2-230.4kbps frequency hopping, 1-2W, TTL/232/485/422, 3.3-30VDC |
| Power Consumption | ≤ 15W (1W radio), ≤ 35W (5W radio) |
Frequently Asked Questions
What is the maximum transmission distance of the COFDM video transmitters?
The transmission distance varies depending on the transmitter power. The 1W version covers more than 20 km, the 5W version covers more than 50 km, and the 10W version can achieve distances above 100 km under line-of-sight conditions.
Does the system support high-speed mobile environments?
Yes, the system is designed with superior anti-multipath capabilities, allowing it to support high-speed movement environments at speeds exceeding 600 kilometers per hour.
What video resolutions and formats are compatible with these devices?
The transmitters support broadcasting and surveillance-level HD video encoding. They feature adaptive HDMI/HD-SDI/CVBS inputs and support 4K, 1080P, 1080i, 720P, and 576P video formats.
How low is the transmission delay of the COFDM system?
The overall system delay is less than 180ms. For specialized CVBS configurations, the end-to-end low latency can be reduced to less than 120ms.
Is the wireless video transmission secure?
Yes, the transmission is secured using 128-bit AES encryption to prevent unauthorized interception and ensure data privacy.
Can I customize the operating frequency?
While the standard operating frequencies are 300-350MHz or 560-610MHz, custom configurations ranging from 200MHz to 2.7GHz can be provided to meet specific requirements.