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 de larga distancia COFDM transmisor HDMI sistema de transmisión de vídeo inalámbrico receptor conjunto completo de audio y vídeo TX RX para UAV Drone UGV 1080P
característica
- altamente integrado, deseño modular combinado
- Usando tecnoloxía de modulación COFDM, H.264 image coding technology
- Pode transmitir unha canle de HDMI 1080P (SDI opcional) sinal
- Menor atraso, the minimum end-to-end delay is 200~250 milliseconds, We also have a super-lower latency model of less than 30-50 milisegundos.
- All-redonda de comunicación, non ten medo de construír muros
- Comunicación de alta velocidade entre viaxes, the maximum moving speed can reach 600 km / hora.
- Transmisor caixa de aluminio tipo disipador de calor, a proba de golpes, Waterproof case is optional.
- Soporte LOS e Non-line-of-sight (NLOS) transmisión móbil
- A distancia non é menor que 30 quilómetros baixo a condición de liña de visión ( Power amplifier and distance: 2 Watts PA 30km, 5 Watts PA 60KM, 10 Watts PA 100km, 20 Watts 150km at LOS)
- Recepción síncrona de sinais de audio e vídeo, alta definición HDMI1080P multi-formato opcional, calidade de imaxe de saída de definición estándar en DVD
- O receptor pode realizar funcións de gravación e copia de seguridade de vídeo
- 128-cifrado e descifrado AES bit
- Personalización completa dispoñible
- Upgrade tool: Parámetro Placa de configuración
- uso: UAV, Vehículos & UGV
- modulación: COFDM
- tensión de funcionamento: DC11V-DC13V
- de traballo actual: 0.5~ 2W (dependendo de diferentes PA)
- Potencia de transmisión: 0.5W~20W optional
Táboa de contidos
aplicación
Este produto úsase principalmente no recoñecemento técnico e na recollida de probas dos departamentos de inspección e seguridade pública, transmisión de imaxe en tempo real de vehículos aéreos non tripulados, buques non tripulados, retransmisión de radio e televisión, transmisións en directo de radio e televisión: campo de emisión, transmisión de deportes, noticias sociais, aire vivo, estudo, Expedición de montañismo, e outros aspectos. É axeitado para a transmisión móbil en tempo real de imaxes de alta calidade en diversos entornos complexos como áreas urbanas, mares, e montañas.
Especificación do transmisor
método de modulación | COFDM |
tensión de traballo | DC11V ~ DC13V |
corrente de traballo | 0.5 Vatios: ≤0,6A DC12V, 1 Vatios: ≤0,8A DC12V, 2 Vatios: ≤1.5A DC12V 5 Vatios: ≤3,0A DC12V 10 Vatios: ≤5.0A DC12V 20 Vatios: ≤7.0A DC12V |
interface de control | interface RS232 estándar, 8 Bits de datos, 1 Sarriba Bit, Bit de paridade, Taxa de transmisión: 19200 |
interface de datos transparente, | unha transmisión de porto serie transparente unidireccional, 8 Bits de datos, 1 Stop Bit, apoia a Odd Parity, Bit de paridade, Paridade sen fíos, Taxa de transmisión: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 |
métodos de cifrado | admite cifrado de 128 bits |
cartografía de modulación | QPSK (4QAM), 16QAM, 64QAM |
corrección de erros | 1/2 2/3 3/4 5/6 7/ 8 |
intervalo de garda | 1/32 1/16 1/8 1/4 |
Número de operador | 2K |
ancho de banda de frecuencia | 2 / 3 / 4 / 5 / 6 / 7 / 8M axustable |
fluxo de código de transmisión | 2000kbs ~ 20000kbs Axustable |
transmitir enerxía | 0.5 / 1 / 2 / 5 / 10 Vatios |
frecuencia de transmisión | Any Frequency Customizable, Paso 1 MHz |
unha planitude de poder | dentro de 10 MHz sen banda que 0,2 dB |
proporción de ombreiro | a potencia de saída de 27 dB, a proporción do ombreiro é mellor que -30dB |
o segundo harmónico | ≤-45dB |
MÁIS | 32Db |
entrada de vídeo | 720×480 60eu(NTSC), 720×576 50eu(PAL), 720 50P, 720 60P, 1080 50eu, 1080 60eu, 1080 24P, 1080 25P, 1080 30P, 1080 50P, varios modos son adaptativos. |
Interface HD | HDMI, SDI opcional |
formato de codificación de vídeo | H.264 |
estándar de protección | chasis tipo radiador de aluminio, anticorrosión, deseño a proba de choques |
tamaño | 9 X 6.4 X 2.3 cm |
Peso total | ≤0.20KG |
Especificación do receptor
Parámetros do receptor HD multi-ancho de banda montado en rack | |
Recibir rango de frecuencia | 170-860MHz VHF&UHF |
ancho de banda de frecuencia | 2/3/4/5/6/7/8MHz, opcional |
Nivel de entrada RF | -94dBm ~ -15dBm (8M ancho de banda)/-98dBm ~ -15dBm (2M ancho de banda) |
impedancia de entrada RF | 50 ohms |
conectores de entrada de RF | Cabeza N |
modo de demodulación | COFDM |
modo constelación | QPSK, 16QAM, 64QAM (opcional) |
corrección de erros | 1/2, 2/3, 3/4, 5 /6,7/8 (opcional) |
número de operador | 2k, |
intervalo de garda | 1/32, 1/16, 1/8, 1/4 (opcional) |
decodificación de vídeo | MPEG-2MP@ML/H.264 |
relación de aspecto | 4: 3 16: 9 |
imaxe de vídeo é | 720 * 576 @ 8MHz 1080P @ 60P |
modo de saída de audio | estéreo desequilibrado 300 / 200mv |
saída de audio | output2Audio + 2saída de vídeo |
tensión de funcionamento | AC220V / DC12V <0.5un |
Temperatura de operación | – 20℃ ~ + 50 ℃ |
Tamaño do aspecto | 480*260*45 (1U) chasis |
peso do equipo | 1.5kg (linguaxe bidireccional 2,5 kg) |
Nota: o conector predeterminado é HDMI, se precisa o modelo máis barato, un conector para CVBS conector de vídeo amarelo 720p HDMI, por favor Consulta aquí for another model.
descrición:
– Este dispositivo adopta a tecnoloxía COFDM, que integra antena de transmisión, modulación dixital, auditivo, and video function.
– Tamaño compacto, calor pequeno, e longo alcance de transmisión
– compatible cunha cámara pequena, podería permitir a captura e transmisión de imaxes en HD
– o alcance de transmisión será maior se adopta antena de alta ganancia
– Rango de transmisión: 5000m (sen ningunha interrupción)/500M con obstáculos interrompen
características:
– Tamaño compacto, deseño de modulación
– Adopta a tecnoloxía de modulación COFDM, Tecnoloxía de compresión de imaxe MPEG-2
– Comunicación omnidireccional
– a comunicación de alta velocidade permite a transmisión de audio e vídeo en tempo real
– Unha carcasa de aluminio a proba de golpes
– Transmisión NLOS
especificacións:
transmisor:
– tamaño:90x64x23mm
– peso:200g
– antena:22mm
recebedor
– tamaño: 87x70x20mm
– peso:200g
– Altura da antena:42.5cm (podería dobrarse)
Especificación técnica
– modulación: COFDM
– tensión de traballo: DC11V-DC13V
– de traballo actual:0.5W: menos de 0.6A @ DC12V
– porto de control: porto RS232 standrad. 8-bits de datos bits, 1-bit stop bit, taxa de transmisión:19200, admite a verificación de paridade estraña
– porto de datos de transmisión:8 bits de datos bits,1 bit stop bit, taxa de transmisión,1200,2400,4800,9600,19200,38400,57600,115200,230400
– Encryption: apoiar 128 cifrado
– cartografía de modulación: QPSK (4QAM),16QAM,64QQAM
– Forward Error Correction: 1/2,2/3,3/4,5/6,7/8
– Protexa o intervalo: 1/32,1/16,1/8,1/4
– Número de operador:2K
– ancho de banda de frecuencia:2/3/4/5/6/7/8M axustable
– fluxo de transporte:2000kbs-20000kbs axustable
– potencia de transmisión: 2W
– frecuencia de transmisión: podería personalizarse, o paso é de 1Mhz
– planitude de potencia: menos de 0,2 db dentro de 10Mhz
– segundo harmónico: menos de -45db
– MÁIS:32db
– entrada de vídeo:1VP-p,75ohm
– Formato de programa de vídeo: MPEG-2
– Calidade do vídeo: 720×576 cando está por riba dos 4M
– formato: Pódense configurar NTSC e PAL
Especificación técnica do receptor:
– Rango de frecuencia do receptor: 170-860MHz, VHF e UHF
– ancho de banda de frecuencia: 2/3/4/5/6/7/8 MHz, axustable
– Nivel de entrada RF:-94dBm-0dbm a 8M / -98dbm-0dbm a 2M
– impedancia de entrada RF: 50ohm
– Porto de entrada RF: grao
– modulación: COFDM
– O camiño das constelacións: QPSK,16QAM,64QAM opcional
– Forward Error Correction: 1/2,2/3,3/4,5/6,7/8 opcional
– Número de operador:2K
– Fenda de protección:1/32,1/16,1/8,1/4
– Taxa de pantalla:4:3,16:9
– imaxe de vídeo:720×576 @ 6Mhz
– Porto de saída de audio e vídeo: patrón 3.5 Porto
– tensión de funcionamento: DC12V 0.3A
Paquete incluído:
– 1 transmisor x
– 1 receptor x
– 1 set x accesorios
30Km long distance COFDM HDMI Wireless Video Transmitter
FAQ
Pregunta 1: Necesito polo menos un alcance de 30 km do aire ao chan para o UAV UGV USV.
resposta 1:O noso sistema admíteo, debería empregar un amplificador de potencia de 2W, é mellor usar a antena transmisora longa especial e dúas antenas receptoras máis altas.
COFDM-912T VS COFDM-908T
Pregunta 2: Ata onde podo chegar se uso o transmisor e o receptor tanto no chan?
resposta: Uso no chan, o transmisor e o receptor deben ter unha certa diferenza de altura para transmitir longas distancias.
A distancia máis longa é só 2.5 quilómetros se o transmisor e o receptor están á mesma altura no chan. Consulta o noso vídeo de proba; porque o transmisor e o receptor están situados a distintos niveis, un lado está na montaña, outro lado está á beira do mar, usamos os dous vatios predeterminados para transmitir 27 quilómetros.
Pregunta 3: Admite un ambiente de traballo de -20 graos?
resposta: si, soportado
Pregunta 4: I want to buy modules and built-in my devices, please tell me the dimension of that modules.
resposta: SD model: 6X7X1.6cm, HD model: 5X7X1.6cm
Pregunta 5:Do you have any special case shells for marine use?
resposta: si, Comprobe a imaxe de abaixo. (For the transmitter with a three-proof shell, a proba de auga, a proba de golpes, anti-salt spray, 防水,防震,防盐雾)
Precautions for order customization
- frecuencia: Please tell me what frequency you need as the default center frequency. Please choose from 170-860Mhz.
- lonxitude da antena: Please tell us the length you want for the 1-piece transmitter and 2-piece receiver antenna. (receiver antenna length has 0.8 ou 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/.
Preguntas frecuentes
Q. What is the video resolution?
un: HDMI 1080p.
Q. Does the transmitter power current is high?
un: Para transmisor, the different PA (amplificador de potencia) dentro, the current is different. 20W 6-7A, 10W 5A, 5W 3A, 1-2W 1.6A
Para recebedor, the current is only 0.3un (300mA)
Q: Like we only need 10km, how much PA is recommended?
un: 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 quilómetros. 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.
Q: What frequency is better? 2.4G or 5.8G?
un: 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.
Q: Can customers adjust the frequency by themselves? If sometimes the frequency is occupied.
un: The default center frequency is 595Mhz, generally there is +/-15Mhz bandwidth, which is 30Mhz, and the frequency range can be adjusted. (580-610MHz).
Beyond this range, it is necessary to change the antenna and PA customized according to this center frequency.
Q:How does the customer adjust the frequency of the transmitter or receiver? Is there any software to change the frequency?
un: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.
Q: Can I adjust the power amplifier on the transmitter?
un: 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.
Por exemplo, 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, etc.
- 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 metros.
- 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 | THE | NLOS |
500mW | >10Km | <300m |
1W | >30Km | <500m |
5W | >60Km | <1500m |
20W | >120km | <3000m |
50W | >200Km | <5000m |
100W | >250Km | <10Km |
Now COFDM-908T supports H.264, not H265.
Max support 1080 50P. 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. Por exemplo, 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 horas.
-
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.
-
Not on the transmitter. Porque COFDM é unha transmisión unidireccional, 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.
-
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.
- si, the wireless video signal reception is improved by using Yagi and omni-directional antennas.
- si, we can build the transmission of telemetry and video in COFDM-908T.
- Primeira, 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 watts. 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.
si, 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, 1080detectado automaticamente despois do inicio do sistema, 1080detectado automaticamente despois do inicio do sistema
actualmente, it does not support 1080i, nor does it support 4K transmission.
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