COFDM 无线视频发射器 HDMI cvbs 输入迷你调制器模块远距离 fpv 无人机 905t

COFDM Wireless Video Transmitter HDMI CVBS input

New COFDM Wireless Video Transmitter HDMI CVBS input mini modulator module long-distance FPV UAV

COFDM无线视频接收器 COFDM-905R

 

High-definition digital wireless transmission transmitter COFDM-905T has a built-in encoder board, RCA COFDM modulation module, and small-size PA power amplifier module (changeable 1W, 2W¯¯, 5W¯¯, 10W¯¯), the whole machine uses CNC aluminum alloy housing, 小型, 轻的, high transmission resolution, 长途, 低延迟.

特征

1. Supported audio and video input methods:
   1. Mini HDMI input (数字的)
   2. 关闭输入 (CVBS Analog, 视频, audio right, audio left)
2. Video input system support:
   1. 迷你 HDMI: 1080 60P, 1080 50P, 1080 30P, 1080 25P, 1080 60我, 1080 50我, 1080 30我, 720 60P, 720 50P, 720 30P, …, 各种适应模式
   2. 关闭于: 720×480 60我 (NTSC), 720×576 50我 (朋友), 模式自适应
3. 视频编码: adopts H264 encoding technology and supports 1080P@60 at the maximum, backward compatible with other various resolutions and frame rate encoding.
4. The video encoding bit rate can be set through the serial port configuration and the default adaptive air interface rate.
5. 正交频分复用调制
   1. Configurable Convolutional Code Ratio: 1/2, 2/3, 3/4, 5/6, 7/8
   2. Configurable modulation method: QPSK/QAM16/QAM64
   3. IFFT模式: 2K
   4. Configurable guard interval: 1/4,1/8,1/16,1/32
   5. Configurable wireless bandwidth: 1MHz~8MHz adjustable, 1KHz stepping
6. Output transmit power amplifier configurable
7. 工作频段: 160MHz~860MHz can be configured;
8. 最大发射功率: 1瓦或2瓦;
9. Provide one-way transparent data transmission serial port;
10. Provides parameters for configuring the serial port and parameter configuration panel
11. AES-256 encryption transmission
12. 电源: 10 ~ 13V, 12V best RF performance;
13. 功耗: The power consumption of the whole unit is about 14W when the transmit power is 1W;
14. 外形尺寸: 74 * 55 * 24.6毫米
15. 重量: 135G

注意

When the COFDM-905T transmitter and COFDM-905T receiver form a point-to-point wireless video transmission system, the video delay indicator:
The three indicators of video delay, video bit rate, and air interface rate are mutual influence and mutual restraint. When the air interface rate is greater than 5 times the video code rate, the video delay is minimum. 在这种情况下, the actual test is that the video delay is about 60 milliseconds when the code is transmitted at 720P@60, 视频延迟约为 130 milliseconds at 1080P@60. The delay refers to the delay from the HDMI video input at the transmitting end to the HDMI video output at the receiving end, 不含发送端前端摄像头延迟 (we measured the delay of a brand SLR camera at about 70 毫秒, and the delay of a famous brand sports camera at about 130 毫秒). For most application scenarios, the video delay is set to about 200 milliseconds by default.

When the COFDM-905T transmitter and the COFDM-905R receiver form a point-to-point wireless video transmission system, the transmission distance is:
The wireless transmission distance is related to many factors such as the test environment, ambient electromagnetic interference, occlusion conditions, air humidity, 工作频率, 无线带宽, and transmitting and receiving antennas. Actual test results: a customer test, unmanned aircraft-mounted transmitter to fly about 100 米高, set to 4M QPSK wireless bandwidth, 700MHz center operating frequency, 1W 发射功率, transmitter antenna 3dBi around, Receiving double glass fiber antenna gain of about 10dBi, a distance of up to 16km (video smooth);

our own road test in Shenzhen, the launch end on the flyover, ordinary hose antenna (about 3dBi gain), 340MHz launch, QPSK 8M Bandwidth, a fiberglass antenna at the receiving end, and a Yagi antenna, 关于 2.2 meters high on the pole, 2.2 公里外, high-definition video smooth, a small number of high-rise buildings between the transmitter and receiver, the road visually about 20 degrees bending. Due to conditional restrictions, no further road tests were made.

连接器

尺寸

75 X 55 X 25 毫米

射频性能测试

工作中心频率 470MHz, 功率放大器: 1W¯¯

工作中心频率 700MHz, 功率放大器: 1W¯¯

升级

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