目录
COFDM 无线视频 HDMI 发射器
COFDM 无线视频 HDMI 发射器 TX 传输 HDMI 高清 1080P CVBS H264 编码器 COFDM-907T
COFDM-907T发射机是一款用于高质量视频和音频传输应用的高速数据传输设备. 除了对摄像头的高质量视频和音频要求, 编码流, 并且通道速率要求非常高. 可传输H.264高质量编解码器, 接收端图像分辨率高达1920X1080P/60.
规范
| 编码 | H.264、MPEG-2 |
| 频段 | 170兆赫~930兆赫 (可根据要求提供可调频率) |
| 调制格式 | COFDM图传 / DVB-T |
| 输出功率放大器 | 1瓦 2瓦 5瓦 10瓦 (出厂前已预设 |
| 通道带宽 | 6兆赫 7兆赫 8兆赫 |
| 子码载波调制 | QPSK, 16QAM, 64QAM |
| 误码率 | 1/2;2/3;3/4;5/6;7/8 |
| Guard Interval | 1/32，1/16，1/8，1/4 |
| 视频码流 | 2Mbps～22Mbps |
| 系统延迟 | 300 毫秒 |
| 传输范围 应用 |
可视范围 机载使用 海事应用 城市应用 郊区应用 |
| 压缩格式 | H.264/MPEG-2 |
| 日期输入 | 串口（115200bit/s）) |
| 视频输入 | HDMI, CVBS (视频音频) |
| 音频输入 | 立体声, AL 左 AR 右 |
| 图像定义 | 1080P/I（1920*1080）兼容720P/I,576产值/产值,480产值/产值,标清( 帧率@25fram/S) |
| 视频输入接口 | 4P 1.25 带状电缆接口, HDMI标准接口 |
| 输入电压范围 | 10电压～35VDC |
| 工作温度 | -20～+65℃ |
| 贮存 | -40～+70℃ |
| 尺寸 | 93毫米×56毫米×23毫米(长×宽×高) |
| 重量基本单位 | 80G (带着风扇) 含天线138g |
LED 和频率
| LED颜色 | 注意 | 频率 |
| 1 0 0 | 1st 绿色 LED 常亮, 并且 tx 正在工作; 2第 2 个和第 3 个蓝色 LED 熄灭 | 503兆赫 |
| 1 1 0 | 1st 绿色 LED 常亮, 并且 tx 正在工作; 2第 2 个蓝色 LED 亮起，第 3 个蓝色 LED 熄灭 | 509兆赫 |
| 1 0 1 | 1st 绿色 LED 常亮, 并且 tx 正在工作; 2第一个蓝色 LED 熄灭，第三个蓝色 LED 亮起 | 515兆赫 |
| 1 1 1 | 1st 绿色 LED 常亮, 并且 tx 正在工作; 2第 2 个和第 3 个蓝色 LED 亮起 | 521兆赫 |
TX 引脚定义
(另请注意，您需要此电缆才能具有 UART TX RX 功能)
P1. 音频L
P2. 音频R
P3. Video
P4. 接地
P5. 电源电压
P6. 接地
P7. TX
P8. RX
画廊
COFDM HDMI 接收器 COFDM-907r
| 标准 | 具有分集功能的 DVB-T/DVB-T2 COFDM 标准模块 2 天线 | ||||
| 调制格式 | COFDM图传 / DVB-T | ||||
| 电源电压 | 12-24直流电压 | ||||
| 频率范围 | 170兆赫~930兆赫 (adjustable, 并可根据您的要求定制2.4-5.8G) | ||||
| 通道带宽 | 6兆赫 / 7兆赫 / 8兆赫 | ||||
| 子码载波调制 | QPSK,16QAM,64QAM | ||||
| Guard Interval | 1/8, 1/4 | ||||
| 误码率 | 1/2;2/3;3/4;5/6;7/8 | ||||
| 输入阻抗 | 50Ω不平衡 | ||||
| 功耗 | 跑步:3最大功率. (直流12V输入); 支持: 0.5最大功率. (直流12V输入) | ||||
| 远程控制接口 | UART / 和 | ||||
| 工作温度 | -20℃~+50℃ | ||||
| 储存温度 | -40℃~+65℃ | ||||
| 音频输出 | 立体声 | ||||
| 视频宽高比 | 16: 9; 4:3 | ||||
| 搜索 | 自动频道搜索, 手动搜索 | ||||
| 视频输出接口 | CVBS, HDMI | ||||
| 红外线控制 | 标准NEC远程红外接收器 | ||||
| 尺寸 | 112毫米×67.5毫米×22毫米 | ||||
| 评论 | 适用于移动环境条件的高级信号处理 | ||||
常见问题解答
几乎 14 瓦特 consumption.
1W is enough for a 1km distance. But we will make 2W for you to ensure the best reception performance.
It also depends on your local environment, whether it is LOS or NLOS, please check our test video, there are many floors and buildings.
For changing different power amplifiers about 500 兆瓦, 1 瓦, 2 瓦, 要么 10 瓦特. It is not just adjusting the setting in the software, You also need to change the Power amplifier hardware inside the transmitter. It can not operate and change at the normal end-user, and the cost and transmitter metal box size are different.
The default frequency setting is 503 兆赫, 509 兆赫, 521 兆赫, 和 521 Mhz to choose, one button on the cabinet can change. If you really need a 1.3Ghz band only, you should choose another model (1.2G or 1.4G). Please tell us the details of your demand.
The engineer guessed that there were two I2C pins in some brand computer HDMI output (for example China Mi laptop). When it was connected to the COFDM HDMI transmitter, the handshake failed, causing the transmitter's HDMI to be unable to recognize other HDMI video sources. This may cause the wireless transmitter's HDMI program to be lost. 当时, you need to use a special software burning tool to re-write the program to use the COFDM-907T's HDMI video input function. The CVBS video input function is not affected by this.
How to analyze whether the HDMI of wireless video transmitter is working properly?
- Ask the customer if he has connected a laptop computer.
- Now that it is confirmed that HDMI cannot output video, it is necessary to determine whether the machine has lost the program
- 方法: Connect the HDMI of the desktop computer to see if the video on the receiver is working properly. If the video is ok, it means that there is no problem with the program.
- If the desktop computer HDMi does not output the video working properly, connect the laptop HDMi to see if the video is ok. If the laptop HDMI outputs the video normally, it means that the program is lost.
测试视频
安装技巧
- Our COFDM-907T has adopted digital COFDM (DVB-T) 技术.
- Please make sure that the transmitter’s omnidirectional antenna and the receiver’s omnidirectional antenna are 垂直的.
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