30Km long distance COFDM HDMI Wireless Video Transmitter FAQ
30Km long distance COFDM HDMI Wireless Video Transmitter Receiver Full Set Audio Video TX RX for UAV Drone 1080P 908T
30-150Km long-distance COFDM HDMI Transmitter Wireless Video Transmission system Receiver full Set Audio Video TX RX for UAV Drone UGV 1080P
Характеристика
- Highly integrated, modular combined design
- Using COFDM modulation technology, Форматы H. 264 image coding technology
- It can transmit one channel of 1080P HDMI (optional SDI) signal
- Lower delay, the minimum end-to-end delay is 200~250 milliseconds, We also have a super-lower latency model of less than 30-50 миллисекунд.
- All-round communication, not afraid of building walls
- High-speed communication between traveling, the maximum moving speed can reach 600 км/сәғ.
- Transmitter heat sink type aluminum case, shockproof, Waterproof case is optional.
- Support LOS and Non-line-of-sight (НКП) mobile transmission
- The distance is not less than 30 kilometers under the condition of line-of-sight ( Power amplifier and distance: 2 Watts PA 30km, 5 Watts PA 60KM, 10 Watts PA 100km, 20 Watts 150km at LOS)
- Synchronous reception of audio and video signals, high-definition HDMI1080P multi-format optional, standard-definition output DVD image quality
- The receiver can realize video recording and backup functions
- 128-bit AES encryption and decryption
- Full customization available
- Upgrade tool: Parameter Configure board
- Ҡулланыу: БПЛО, Vehicles & UGV
- Модуляция: РАЗДОРА
- Working voltage: DC11V-DC13V
- Эшсене ток: 0.5~2ВТ (depending on different PA)
- Transmission power: 0.5W~20W optional
Table of Contents
Ҡушымта
This product is mainly used in the technical reconnaissance and evidence collection of public security and safety inspection departments, real-time image transmission of unmanned aerial vehicles, unmanned ships, radio and television relay, radio and television live broadcasts: broadcast field, sports broadcast, social news, air live, studio, mountaineering Expedition, and other aspects. It is suitable for real-time mobile transmission of high-quality images in various complex environments such as urban areas, seas, and mountains.
Transmitter Specification
modulation method | РАЗДОРА |
working voltage | DC11V~DC13V |
working current | 0.5 Watts: ≤0.6A DC12V, 1 Watts: ≤0.8A DC12V, 2 Watts: ≤1.5A DC12V 5 Watts: ≤3.0A DC12V 10 Watts: ≤5.0A DC12V 20 Watts: ≤7.0A DC12V |
control interface | standard RS232 interface, 8 Data Bits, 1 Менәнtop Bit, Parity Bit, Baud Rate: 19200 |
transparent data interface, | a one-way transparent serial port transmission, 8 Data Bits, 1 Stop Bit, support Odd Parity, Parity Bit, Wireless Parity, Baud Rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 |
encryption methods | support 128-bit encryption |
modulation mapping | ФМ (4Кам), 16Кам, 64Кам |
ремонт тура хата | 1/2 2/3 3/4 5/6 7/ 8 |
Интервал һаҡлау | 1/32 1/16 1/8 1/4 |
Carrier number | 2Т |
Frequency bandwidth | 2 / 3 / 4 / 5 / 6 / 7 / 8M Adjustable |
transmission code stream | 2000kbs~20000kbs Adjustable |
көс бирә | 0.5 / 1 / 2 / 5 / 10 Watts |
transmission frequency | Any Frequency Customizable, Step 1MHz |
a power flatness | within10MHz bandless than 0.2dB |
ratio of shoulder | the output power of 27dB, shoulder ratio is better than -30dB |
the second harmonic | ≤-45dB |
MER | 32Db |
input video | 720×480 60Мин(БЫЛ NTSC), 720×576 50Мин(Дружи), 720 50П., 720 60П., 1080 50Мин, 1080 60Мин, 1080 24П., 1080 25П., 1080 30П., 1080 50П., various modes are adaptive. |
HD Interface | Интерфейс ORTHOPAEDIST, SDI optional |
video encoding format | Форматы H. 264 |
protection standard | all-aluminum radiator-type chassis, anti-corrosion, shock-proof design |
Дөйөм күләме | 9 х 6.4 х 2.3 см-ға |
Overall weight | ≤0.20KG |
Receiver Specification
Machine Rack-mounted multi-bandwidth HD receiver parameters | |
Receive frequency range | 170-860MHz VHF&УВЧ |
frequency bandwidth | 2/3/4/5/6/7/8МГц, мәжбүри |
RF input level | -94dBm~-15dBm (8M bandwidth)/-98dBm ~-15dBm (2M bandwidth) |
RF input impedance | 50 ohms |
RF input connector | N-head |
demodulation mode | РАЗДОРА |
constellation mode | ФМ, 16Кам, 64Кам (мәжбүри) |
ремонт тура хата | 1/2, 2/3, 3/4, 5 /6,7/8 (мәжбүри) |
carrier number | 2k, |
интервал һаҡлау | 1/32, 1/16, 1/8, 1/4 (мәжбүри) |
video decoding | MPEG-2MP@ML/H.264 |
aspect ratio | 4: 3 16: 9 |
video image is | 720 * 576 @ 8MHz 1080P @ 60P |
audio output mode | stereo unbalanced 300 / 200mv |
audio output | output2Audio + 2Видео төшөү |
operating voltage | AC220V / 12В <0.5Ә |
Эш температураһы | – 20℃~+50℃ |
Appearance size | 480*260*45 (1U) chassis |
equipment weight | 1.5кг (two-way language 2.5Kg) |
Иҫкәрмә: the default connector is HDMI, if you need the cheaper model, a connector for CVBS Yellow video connector 720p HDMI, рәхим Check here for another model.
Тасуирлама:
– This device adopts COFDM technology, which integrates transmission antenna, digital modulation, audio, and video function.
– Compact size, small heat, and long transmission range
– compatible with a small camera, could enable HD image capture and transmission
– the transmission range will be longer if it adopts high gain antenna
– Transmission range: 5000м (without any interrupt)/500M with obstacles interrupt
Үҙенсәлектәре:
– Compact size, modulation design
– Adopts COFDM modulation technology, MPEG-2 image com compression technology
– Omnidirectional communication
– high-speed communication enables real-time audio and video transmission
– An aluminum case that is shockproof
– NLOS transmission
Спецификацияһы:
Transmitter:
– Күләме:90x64x23mm
– ауырлыҡтар:200г
– антенна:22мм
Прием
– Күләме: 87x70x20mm
– ауырлыҡтар:200г
– Antenna height:42.5см-ға (could be bent)
Technical specification
– Модуляция: РАЗДОРА
– working voltage: DC11V-DC13V
– Эшсене ток:0.5Вт: less than 0.6A @ DC12V
– control port: standrad RS232 port. 8-bit data bits, 1-bit stop bit, Baud rate:19200, support odd parity check
– transmission data port:8 bit data bits,1 bit stop bit, Baud rate,1200,2400,4800,9600,19200,38400,57600,115200,230400
– Шифрлау: ярҙам 128 encryption
– Modulation mapping: ФМ (4Кам),16Кам,64QQAM
– Forward error correction: 1/2,2/3,3/4,5/6,7/8
– Protect the interval: 1/32,1/16,1/8,1/4
– Carrier number:2Т
– Frequency bandwidth:2/3/4/5/6/7/8M adjustable
– transport stream:2000kbs-20000kbs adjustable
– transmission power: 2Вт
– transmission frequency: could be customized, step is 1Mhz
– power flatness: less than 0.2db within10Mhz
– Second harmonic: less than -45db
– MER:32дБ
– input video:1VP-р,75ома
– Video program format: БЫЛ MPEG-2
– Video quality: 720×576 when above 4M
– Форматта: NTSC and PAL could be set
Receiver technical specification:
– Receiver frequency range: 170-860МГц, VHF and UHF
– Frequency bandwidth: 2/3/4/5/6/7/8 МГц, регулируема
– RF input level:-94бм-0dbm at 8M/-98dbm-0dbm at 2M
– RF input impedance: 50ома
– RF input port: СМА
– modulation: РАЗДОРА
– The constellation way: ФМ,16Кам,64QAM optional
– Forward error correction: 1/2,2/3,3/4,5/6,7/8 мәжбүри
– Carrier number:2Т
– Protection gap:1/32,1/16,1/8,1/4
– Screen rate:4:3,16:9
– video image:720×576 @6Mhz
– Audio and video output port: стандарттарына 3.5 порт
– Working voltage: DC12V 0.3A
Package included:
– 1 x transmitter
– 1 x receiver
– 1 set x accessories
30Km long distance COFDM HDMI Wireless Video Transmitter
FAQ
Мәсьәлә 1: I need at least a 30km range from air to ground for the UAV UGV USV.
Яуап 1:Our system supports it, it should use a 2W power amplifier, it is better to use the special long transmitter antenna and two higher receiver antennas.
COFDM-912T VS COFDM-908T
Мәсьәлә 2: How far can I get if I use the transmitter and receiver both on the ground?
Яуап: On ground use, the transmitter and receiver must have a certain height difference to transmit long distances.
The longest distance is only 2.5 kilometers if the transmitter and receiver are both at the same height on the ground. Please see our test video; because the transmitter and receiver are placed at different levels, one side is at the mountain, another side is at the seaside, we used the default two watts to transmit 27 kilometers.
Мәсьәлә 3: Does it support a working environment of -20 градусҡа?
Яуап: Әле, хуплана
Мәсьәлә 4: I want to buy modules and built-in my devices, please tell me the dimension of that modules.
Яуап: SD model: 6X7X1.6cm, HD model: 5X7X1.6cm
Мәсьәлә 5:Do you have any special case shells for marine use?
Яуап: Әле, Please check the below picture. (For the transmitter with a three-proof shell, waterproof, shockproof, anti-salt spray, 防水,防震,防盐雾)
Precautions for order customization
- Йышлығы: Please tell me what frequency you need as the default center frequency. Please choose from 170-860Mhz.
- Оҙонлоғо антенна : Please tell us the length you want for the 1-piece transmitter and 2-piece receiver antenna. (receiver antenna length has 0.8 йәки 1.8 meters optional)
- Antenna type:
According to your application scenario, the wireless video transmitter be placed on the drone or on the ground, or on the vehicle? Select different transmit antennas for transmitter and receiver antennas.
The transmitter of the UAV uses a short omnidirectional antenna as much as possible. The transmitter antenna installed on the ground or on the vehicle should be as long as possible, and it can be installed higher to avoid other obstacles on the ground. The receiver is generally used on the ground, try to choose a longer receiver antenna. If it is fixed in one place, a directional antenna can also be used. For more antenna types, please refer to https://ivcan.com/price-list-for-wireless-video-transmitter-and-receiver-antenna/.
FAQs
Мәсьәлә. What is the video resolution?
Ә: HDMI 1080P.
Мәсьәлә. Does the transmitter power current is high?
Ә: For Transmitter, the different PA (power amplifier) inside, the current is different. 20W 6-7A, 10W 5A, 5W 3A, 1-2W 1.6A
For Прием, the current is only 0.3Ә (300ма)
Мәсьәлә: Like we only need 10km, how much PA is recommended?
Ә: Considering that your transmitter and receiver are used on the ground, unlike drones, the heights of the transmitter and receiver are very different. It is recommended to use a 10W PA transmitter for 10 kilometers. You also need to consider that your receiver is installed on the car, and it keeps moving at high speed at any time. Only a high-power transmitter can ensure the signal stability at the receiver.
Мәсьәлә: What frequency is better? 2.4G or 5.8G?
Ә: The frequency range of Cofdm is 170~860Mhz.
We also have products that use 2.4G or 5.8G, but the range of these two intervals is the same as the frequency of WiFi, which will cause the transmission to be greatly interfered by WiFi, and the transmission distance will be greatly shortened.
If there are digital TV DVB-T signals locally, try to avoid frequencies in these ranges when selecting frequencies.
Мәсьәлә: Can customers adjust the frequency by themselves? If sometimes the frequency is occupied.
Ә: The default center frequency is 595Mhz, generally there is +/-15Mhz bandwidth, which is 30Mhz, and the frequency range can be adjusted. (580-610МГц).
Beyond this range, it is necessary to change the antenna and PA customized according to this center frequency.
Мәсьәлә:How does the customer adjust the frequency of the transmitter or receiver? Is there any software to change the frequency?
Ә:It's very easy, the transmitter can use the assistant board next to the picture, and the receiver's assistant board is on the fuselage, with a screen and buttons.
But it is not recommended for customers to adjust, because sometimes he changed the parameters of the transmitter but did not change the parameters of the receiver, saying that he could not receive the signal.
Мәсьәлә: Can I adjust the power amplifier on the transmitter?
Ә: The user can reduce the actual output power by increasing the impedance of the high power, but cannot increase the transmitter of the low power PA.
Мәҫәлән, 10W PA can change to 5W PA, but can not change 5W PA to 10W.
- No one can tell you the exact transmission distance. Because the transmission distance depends on the height of your transceiver antenna and the type and thickness of obstacles, whether the transmitted signal can be diffracted, whether there is interference in the current frequency, һ. б..
- There are trees or a mountain in the middle, and the transmission distance is different.
- It is difficult to tell you an accurate transmission distance, even the walls have thickness, generally 500-1000 метрға.
- Please watch our test video, if you think it is suitable, you can buy a sample for testing, if you are not satisfied, you can return it to us.
- Here is a form for COFDM PA and LOS and NLOS transmission distance for your references.
PA | Лос | НКП |
500МВт | >10Km | <300м |
1Вт | >30Km | <500м |
5Вт | >60Km | <1500м |
20Вт | >120км | <3000м |
50Вт | >200Km | <5000м |
100Вт | >250Km | <10Km |
Now COFDM-908T supports H.264, not H265.
Max support 1080 50П.. We have actually tested that at 1080P60, the frame will be stuck, or the recognition will be incomplete
- Power consumption is equal to current times voltage. Мәҫәлән, for a 10W transmitter, the current is 5.5A, and the voltage is 12V, so its power consumption is 66W.
- If you prepare a 1000W rechargeable battery and use a 10W PA transmitter, it is estimated that you can use 1000W divided by 66W, which is equal to 15 сәғәт.
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Whether the link between the transmitter and receiver is good or the signal strength can be seen on the small screen at the COFDM receiver.
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Not on the transmitter. Because COFDM is a one-way transmission, only the receiver can receive the signal strength of the transmission and show them on the screen. If the transmitter needs to see these signals, it is necessary to add a set of data transmission devices to transfer the status signal from the receiver to the transmitter and display them by the signal light.
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The transmitter and receiver of two-way transmission can have this function, and it is recommended to choose a bidirectional transmission device.
- First of all the frequency is correct.
- In order to achieve the best performance of the transmitter, power amplifier and antenna, they are generally customized according to a central operating frequency point, and they can all work within a working frequency range, generally ±15Mhz. That is to say, when the central operating frequency is 290Mhz, the working range of the transmitter is 275Mhz~305Mhz. So it meets the frequency range of 280~300Mhz required by customers.
- Әле, the wireless video signal reception is improved by using Yagi and omni-directional antennas.
- Әле, we can build the transmission of telemetry and video in COFDM-908T.
- First, the 10-watt RF linear amplifier and the 20-watt RF linear amplifier use the same cavity, which is machined by a CNC mill.
- CNC milling machines are not only expensive but also take a long time to process. The 20W and 10W cavities are universal, so they can be used with each other. For faster delivery, this character was not changed and used directly.
- This product actually has 20 Вт. We used special instruments to test it before shipment. Please see the video below. (The instrument shows 3.04dBm plus the black attenuator 40dBm equals 43.04dBm)
- Test video at youtube: https://www.youtube.com/shorts/jfNoZeb1BIA
- Here are some correspondences between the output power and the dBm parameters displayed by the instrument.
- 20mW is 13dBm
200mW is 23dBm
1 Watts is 30dBm
2 Watts is 33dBm
5 Watts is 37dBm
10 Watts is 40dBm
20 Watts is 43dBm
50 Watts is 47dBm
100 Watts is 50dBm
Normal Four HDMI Video input and One HDMI output box
If it is just a simple splicing of four camera videos into one video, you can add a box with four HDMI inputs and one HDMI output in front of the transmitter. This means that the monitor on the receiver will always display each video on a quarter of the screen.
Әле, our dual antenna RF input receiver supports diversity. You can use two yagi directional antenna on our cofdm wireless video receiver.
For better signal reception, it is recommended to have one Yagi directional antenna and one omnidirectional antenna installed on the receiver.
It can be used by photographers. Currently supports 1080@60P, 1080@50P, 1080@30P
Әлеге ваҡытта., it does not support 1080i, nor does it support 4K transmission.
20km over sea HDMI wireless video transmitter and receiver test for boat or from shore to ship
Long-range 20 Watts Power Amplifier Transmitter and Receiver needs a 12V 6A power supply
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