高清便攜COFDM移動視頻無線傳輸系統用戶手冊
COFDM Mobile Video Wireless Transmission users manual for COFDM-908T and COFDM-912T
Users Manual for COFDM Mobile Video Wireless Transmission
This is a manual for COFDM-912T and COFDM-908T. If the HD input is mentioned in the text, it refers to the COFDM-908T model. If the SD input is mentioned in the text, it refers to the COFDM-912T model. Please Pay attention to the distinction.
目錄
1. 特徵
- 高度集成, 模塊化設計
- 採用COFDM調製技術, H.264圖像編碼技術
- Can transmit one 1080P HDMI signal and one unidirectional data up to 230400Kbps
- 低延遲, the minimum end-to-end latency is 350ms
- 全方位通信, 不怕建築幕牆
- High-speed travel-to-travel communication,
- 變送器散熱器式鋁殼, shockproof and impact resistant
- 非行的視線 (NLOS) 移動傳輸, the transmission distance of 2W power is not less than 30 kilometers under the condition of no interference, the transmission distance of 5W power is not less than 50 公里, and the transmission distance of 10W power is not less than 80 公里
- 最大移動速度可以達到600Km /小時 (被測)
- 同步接收音頻和視頻信號, 高清HDMI1080P多種格式可選, 標清輸出DVD圖像質量
- 接收器可以實現視頻錄製和備份功能
- 128-位AES加密和解密
- Can provide full customization
2. 應用
This product is mainly used in technical reconnaissance and evidence collection of public security and safety inspection departments, real-time picture transmission of drones and unmanned ships, radio and television broadcasting, broadcasting live broadcasting: 廣播領域, 體育廣播, 社會新聞、空中直播、工作室, mountaineering expeditions and more. 它適合在各種複雜環境（例如市區）中實時移動傳輸高質量圖像, 海域, 和山.
3: Parameter Indicators
1: 發射機 (only standardized pictures, except for customization)
Product parameters:
| 調製 | COFDM |
| 工作電壓 | DC11V~DC17V |
| 工作電流 | 1W¯¯：≤1.3A DC12V，5W¯¯：≤2.5A DC12V，10W¯¯：≤5.2A DC12V， |
| 控制界面 | Standard RS232 interface, 8 數據位, 1 停止位, 偶校驗, 波特率: 19200 |
| 透明數據接口 | 單向透明串行端口傳輸, 8 數據位, 1 停止位, 支持奇校驗, 偶校驗, 無線奇偶校驗, 波特率: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 、230400 |
| 加密 | 支持128位加密 |
| 調製映射 | QPSK（4QAM）、16QAM、64QAM |
| 前向糾錯 | 1/2 2/3 3/4 5/6 7/8 |
| 保護間隔 | 1/32 1/16 1/8 1/4 |
| 運營商的號碼 | 2ķ |
| 頻寬 | 2/3/4/5/6/7/8中號可調 |
| 運輸流 | 2000KBS〜20000kbs可調 |
| 發射功率 | 1寬/5W/10W |
| 傳輸頻率 | Any frequency can be customized, the frequency is continuously adjustable, the adjustable range is ±20MHz, and the step is 1MHz |
| 功率平坦度 | Less than 0.2dB in 10MHz band |
| 肩比 | The shoulder-to-shoulder ratio is better than -28dB at full power output |
| second harmonic | ≤-45分貝 |
| MORE | 32分貝 |
| 輸入視頻 | 720×480 60一世(NTSC), 720×576 50一世(朋友), 720 50P, 720 60P, 1080 50一世, 1080 60一世, 1080 24P, 1080 25P, 1080 30P, 1080 50P, 各種模式都是自適應的. |
| 高清接口 | HDMI |
| 視頻編碼格式 | H.264 |
| 保護標準 | 全鋁製散熱器型底盤, 防腐蝕, 防震設計 |
| 整體尺寸 | 102*80*30mm（1w)/102*90*30mm（5W）/188*47*34mm（10W）/228*55*40mm（20W） |
| 總重量 | ≤0.20KG （1W） / ≤0.27KG （5W） ≤1.5KG （10W） ≤2KG （20W） |
2: 接收器
Product parameters:
| Portable multi-bandwidth HD receiver parameters | |
| 接收頻率範圍 | 170-860MHz的VHF&超高頻 |
| 頻寬 | 2/3/4/5/6/7/8兆赫, 可選的 |
| RF輸入電平 | -94dBm〜-15dBm (在8M帶寬)/-98dBm〜-15dBm (at 2M bandwidth) |
| RF輸入阻抗 | 50 歐姆 |
| RF輸入連接器 | N頭 |
| 解調方法 | COFDM |
| Constellation way | QPSK, 16QAM, 64QAM (可選的) |
| 前向糾錯 | 1/2,2/3,3/4,5/6,7/8 (可選的) |
| 運營商的號碼 | 2ķ， |
| 保護間隔 | 1/32,1/16,1/8,1/4 (可選的) |
| 視頻解碼 | MPEG-2MP@ML/H.264 |
| screen aspect ratio | 4:3 16:9 |
| Video output image | 720*576@8MHz 1080P@60P、50P、50一世、30P、 |
| 音頻輸出模式 | Stereo unbalanced 300/ 200MV |
| 音頻輸出 | 2音頻輸出 + 2視頻輸出 |
| 工作電壓 | AC220V/DC12V ＜0.4A |
| 工作溫度 | -20℃〜+ 50℃ |
| physical dimension | 136*115*35mm non-standard all-aluminum shell |
| 設備重量 | 0.35公斤 |
4: Instructions for use
1: 發射機
- Functional area description
“螞蟻”: Transmitting antenna interface, please connect the antenna before powering on
“HDMI”: High-definition video input interface, input below 1080/50P
“Ctrl”: Transmitter tuner connection interface
“DC 12V”: DC12V power input port. “+” is the positive pole of the power supply, “-” is the negative pole of the power supply
“DC” 是: 電源指示燈, when the light is always on, it means that the power input of the transmitting module is normal
“TS”: Video input detection indicator light, this light is always on to indicate video input and normal encoding
- Parameter Configuration Description
Connect the transmitter parameter adjuster, press the “MENU/OK” key to enter the menu, the encryption key and data serial port parameters are displayed first, press the left or right key to move the cursor, and the up and down keys to adjust the parameters
After the parameter setting is completed, 按 “MENU/OK” to enter the next menu, and the interface is displayed as shown in the figure
Press the left or right key to move the cursor, press the up or down key to adjust the required parameters, the interface prompts as shown in the figure
After all parameter settings are completed, press the “MENU/OK” key to confirm, and the display will be as shown in the figure.
After the setting is completed, the parameters are written successfully, and the display is as shown in the figure
- General Troubleshooting
一個: The light is off after the power is turned on: Check whether the power input meets the standard
b: “TS” indicator light is off: Check the video input connection cable, check whether the video input format conforms, and check whether the camera is interfered with (you can judge by holding the antenna with your hand).
C: The temperature of the transmitter is very low: check whether the current is normal (the deviation can be ±0.2A within the standard current).
d: Three lights are always on, and one of them is super bright: it means that the transmitter has failed the detection, and you can try to power off and restart (uncommon)
2: 接收器
- Functional area description
“RF in1” “RF in2”: receiving antenna interface, it is recommended to connect the antenna and then turn on the power switch, because the static electricity of the human body may cause the receiver to crash.
“HDMI”: 視頻輸出接口, the output video format can be adjusted through the “HDMI” menu on the control panel.
“DC 12V”: 電源輸入接口, please strictly follow the power supply voltage requirements, and overvoltage input is strictly prohibited
“開關”: power switch.
“USB”: video storage interface, when the U disk is inserted, press the “EXIT” button to start the video recording, after the recording is successful, the video display will display the video recording time, and the stored file name is “TS”.
- LCD parameter description
一個：CH01 UNLOCKED（LCKED）
“CH01” means the channel number of the receiver, “UNLOCKED” means the received signal is unlocked, 和 “LCKED” means the signal is locked. “CH00” of the receiver is the initial writing channel, and the default channel corresponding to the normal operation of the transmitter is “CH001”
b： FREQ：602.0兆赫
“602.0兆赫” is the receiving frequency of the receiver, this frequency must be consistent with the frequency set by the transmitter, otherwise the receiver will not search or receive the signal from the transmitter
C： BW:6.0兆赫
“BW” 帶寬, as shown in the figure, “BW: 兆赫” is understood as the RF bandwidth is 6MHz, this bandwidth must be consistent with the bandwidth set by the transmitter, otherwise the receiver will search for or cannot receive the signal from the transmitter
d： FEC:1/2
“FEC: 1/2” is the channel error correction, this parameter synchronizes the parameters set by the transmitter, and the receiver cannot be modified
Ë： GI:1/32
“GI:1/32” is the channel guard interval, this parameter is set by the transmitter synchronously, and the receiver cannot be modified
F:MAP: QPSK
“MAP: QPSK” is the modulation mapping, this parameter number is set by the transmitter synchronously, and the receiver cannot be modified
G： SNR:0.0分貝(SNR:15.0分貝)
“SNR: 15.0分貝” is the signal quality (那是, the signal-to-noise ratio, the larger the value, the better). 什麼時候 “0.0分貝” is displayed, the signal quality is 0, and the receiver will not be able to lock
“(SNR:15.0分貝)” means the receiving signal-to-noise ratio is greater than 15dB. In the “QPSK” modulation mapping state, as long as the signal-to-noise ratio is greater than 6dB, the receiver can lock
H: PW：-72.1dBm（PW:-72.1）
PW is the received signal strength, (reference level value), the farther the transceiver end is relative to the distance, the weaker the signal strength is, and the larger the displayed value is, when the transmitter is not turned on, if the signal strength of the receiver is greater than -90dBm (such as -79.7dBm), it can be considered as adjacent frequency interference
- Parameter Configuration Description
Power on the receiver, and press the “MENU/OK” button to enter the menu, the first display is the menu of adjustable parameters, if you search for a specified frequency, directly press the “MENU/OK” button to enter the menu; if you want to remove the channel, press Press down to select “ListanbulChannel”, and then press “MENU/OK” to enter the menu operation; if you need to change the video output format, move the cursor to the “HDMI Mode” 選單, 按 “MENU/OK” to enter, and select the video to be output After formatting, press the “MENU/OK” key to confirm.
The frequency search method is as follows. After entering the frequency setting menu, the interface is displayed as shown in the figure. Press the left or right key to move the cursor, press the up or down key to adjust the frequency, RF帶寬, and secret key that match the transmitter, and press the “MENU /OK” key to search. Note that the transmitter must be turned on at this time, 除此以外, the receiver will not be able to lock because it cannot find the signal.
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When the search is completed, 按 “MENU/OK” 確認, and the channel is saved in the register of the assistant board, as shown in the figure. To save the channel to the receiver register, press the “MENU/OK” key and the right key at the same time.
After the receiver parameter setting is completed, the functions of the panel keys are as follows
“↑”“↓“: each individually selectable receiver channel “CH**”
“←”“→“: You can choose to view the hidden parameters of the receiver
“EXIT”: start and stop recording
- 視頻功能
Insert the storage device into the “USB” interface of the receiver, press the “EXIT” button to start recording, and a blue recording time box will appear on the upper left corner of the video display as shown below
- General Troubleshooting
一個: The value after the receiver displays “-” is very low (Tx is not turned on): It means that the current channel has serious electromagnetic interference, and the normal value is -90- -100.
b: Cannot record video: check the U disk or replace the U disk.
C: No signal received: Check whether the channel frequency is consistent with the transmitter.
d: No video output: Check the connection line, power off, and restart to check whether there is a boot interface.
