Transmisor ka receptor vídeo inalámbrico COFDM
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COFDM Wireless video transmitter and receiver Dimension
2-watt PA COFDM Wireless Video Transmitter
Buka'aj: 90x65 x 22mm
The most recent advancements in COFDM (Multiplexación tumen división frecuencia ortogonal u codificada) wireless video transmitter and receiver technology have transformed how video is transmitted and received. COFDM is a modulation technique that allows digital data to be transmitted over a wide range of frequencies, resulting in a more reliable signal and improved data transmission.
We use COFDM technology in numerous applications, such as digital television, wireless video transmission, and digital radio. It’s also found in military and aerospace applications like satellite communications and unmanned aerial vehicles.
Finalmente, recent advancements in COFDM wireless video transmitter and receiver technology have transformed the way video is transmitted and received. This technology has enabled high-definition video transmission over wireless networks, as well as video transmission over a variety of networks and devices. The use of advanced coding techniques, such as forward error correction (FEC) and adaptive modulation, has enabled this.
5-watt PA COFDM Wireless Video Transmitter
5-Watt PA COFDM-912T Weight
Package for one full set of the COFDM Wireless Video Transmitter
FAQ of the COFDM Wireless Video Transmitter and Receiver
Hola, I am looking for a long-range hd video transmitter with hdmi input and a receiver with hdmi output.
Would you like a unidireccional o bidireccional Yaan u? As long as you need to send the video, do you still need to send the control operation of the drone?
Only transmit and receive in a surveillance center. The idea is to use the HDMI output of the remote control and retransmit it to the central. The drone has a system to transmit over the internet, but there is no internet in the desert, so we need to retransmit but not with the internet.
Ma'alo'ob, our one-way long-range wireless video transmission solution is the base of COFDM technology (similar to DVB-T digital TV broadcasting). It is not on the base of the Internet.
Does this COFDM wireless video transmitter and receiver have AES 256 o 128 encriptación? the output format is full hd?
Je'el, COFDM-912T supports AES 128 encriptación. Please notify us to plus a Parameter Configuration board for setting the AES128 password when you are placing the order. It is optional to buy.
The COFDM-912T transmitter only supports SD720P Video input. So even if the receiver has HDMI output, it cannot output real 1080P high-definition video, only 720P.
If you have very high requirements on the definition of picture output, I suggest you choose a model that both the transmitter and receiver support 1080P, COFDM-908T
Can it reach 30 km around?
In the introduction of the wireless video transmission system, all the transmission distances mentioned are based on the visible range (LE). The 2WPA power amplifier supports 30 kilometers and is usually used on drones. The altitude is very high and the receiver is on the ground, so there is an obvious height difference between the transmitter and the receiver, and the wireless signal is transmitted in accordance with the waveform. The signal loss is small and other interference is very little clutter.
You mentioned that your usage scenario is that both the transmitter and receiver are on the ground, especially in desert areas, and there may be rolling sand dunes. Tune', the signal transmitted wirelessly is easily interfered with. So here are the suggestions:
1. Try to use a high-power transmitter, tales bey 10 Vatios wa 20 Vatios. Many of our ship customers use 20W transmitters.
2. Try to use a higher antenna or put the antenna on the roof or a nearby hill, and you can also increase the antenna tripod. Our clients always choose some 1.8-meter FRP omnidirectional fiberglass antennas.
3. If conditions permit, jump'éel repetidor can also be added to enhance the signal strength and increase the transmission distance. The repeater can be fixed at a high place or on the roof of a moving car.
How to assemble the wireless video transmitter, cámara, and battery?
Much consulte u wíimbala' u kaambal. 
There are two power connectors at the transmitter, the red connector is 12V output for the camera, and the black connector is 12V input.
What is the lag or delay in milliseconds of your COFDM-912T?
200-300ms with a regular camera and monitor.
Normal camera and screen have a delay of 200 milisegundos, Derecha?
With our 100 milisegundos, it’s about 300 Utia'al 400.
We also have one with 30 milisegundos, but the price is 6 times that
300 milliseconds is acceptable if your plane has an automatic obstacle avoidance function.
I noted your transmitter can support up to 30 kilometers in LOS. How far will it support in the NLOS environment?
It’s hard to say the range of non-line-of-sight use, it depends on how many obstacles are in the middle. It is difficult to transmit if fully surrounded metal or mountains block it.
The test environment is unique, and the distance obtained from the test is also different. We can’t make any guarantees or promises about this.
We are a company that offers a solution to some rural areas here in the Philippines to monitor their rivers. If we purchased a 2W(30kilómetro) in the NLOS location, it could be reduced to 20km or more?
It is hard to say, it should depend on the obstacles between the transmitter and receiver. We don’t test it in your use environment, So I can’t tell you.
The same product will be interfered with differently in different environments, and the transmission distance is hard to say. Only the actual test will know.
Buyer: Actually, we have installed a radio transceiver that gathers a data sensor and transmits its data to an 18km distance center command. The operation is smooth and ok.
The same place we’re going to put up the device that we will buy from you.
As you have said, only an actual test will answer all of my questions.
Can the COFDM-912T TX device output separate serial data?
Data can only be transmitted in one direction from the transmitter to the receiver.
If you need to transmit data in both directions, you need to add a digital radio telemetry. (wireless data transceiver).
I would like to know if the transmitter can also output serial data on what the camera is capturing. Other than RF does it have a separate rs232 output for the transmitter?
Je'el, COFDM-912T supports transferring the serial data for you. Much consulte u wíimbala' u kaambal. 
In this module where I can put up the camera? What type of camera is suited for this device?
The black one on the left shows a little bit of the above picture, which is connected to the camera.
It supports a 720p CVBS composite AV camera. or any HDMI camera by HDMI to AV converter box.
How can I let the transmission still work well if I remove the menu and panel board from the receiver?
Is there any way to disable the control panel so that the receiver can see the video from the transmitter?
If I remove the control panel on the receiver, the receiver does not see the signal from the transmitter.
Núukik: Please check the FAQ in the below link.
https://ivcan.com/p/cofdm-video-transmitter-receiver-av-in-hdmi-out/#accordion-item-6._i_have_changed_the_parameter_on_the_configure_board_tool,_why_it_is_not_saving_when_i_restart?
I guess that you did not save the frequency, after you remove the menu on the receiver, the system will be back to the default frequency of 340Mhz. So you can not get the signal.
If GPS and TX are separated less than 1 medidor u – GPS is jammed. COFDM-912T has significant noise in GPS l1 and l2 freq. Do you have any low-pass filters to solve this problem?
Hola! We did extensive testing before ordering a bigger batch. And faced issues if combining the COFDM-912T transmitter with GPS.
Núukik:
1. If you buy it again, I can add a low pass filter in the transmitter inside free. I can also provide an external low-pass filter for you for free.
2. “Do you know what insertion loss is in non-filtered frequency?”, Núukik: max 0.6db
3. “Do you know what dBm loss is pass frequency?” 0.4dBm
COFDM-912T Customize Development
2 Watts default 595Mhz with 1.8-meter transmitter and receiver antenna
The client told us that his application details, the transmitter and receiver, are both used on the ground. In order to enhance the wireless transmission distance and avoid other signal interference, I recommend that both the transmitter and receiver antennas use 1.8-meter fiberglass antennas.
It was the first time the customer took the sample for testing, so he used the default two-watt amplifier and 595 MHz frequency.
The customer requires that the transmitter have an HDMI output so that he can transmit the received video to other devices. In wéet k'iin, in order to support HDMI input, I also matched an HDMI to CVBS RCA AV converter box.
The customer has added an optional parameter adjustment tool, the main function of which is to modify the transmitter’s transmission frequency and impedance. You can also add a password to the wirelessly transmitted video to encrypt the video of the transmitter. We must enter the same password on the receiver to decode the video to improve the security of the video.
Change COFDM Transmitter to 200 mW PA, with a power switch of the cooling fan for body wear
Customize a video on-off switch on the COFDM Transmitter for audio-only wireless transfer.
Here is the test video for this client’s requirement, added a video on-off switch at the 10-watt PA wireless video transmitter to transfer the audio only.
Here is a video to show you that we can add one video on-off switch on the COFDM wireless video audio transmitter.
Video on, then the transmitter will transfer the video and audio at the same time.
Video off, then the transmitter will transfer the audio only.
If you have any project or need to customize the function of the wireless video transmitter and receiver, Béet contáctenos.
The default power amplifier is 2-watt, we also make a 10-watt PA inside, to support long-range and transfer more extended distances.
2 Watts default 595Mhz with Yagi Directional Antenna and Omnidirectional antenna
300 Watts power amplifier modified 230Mhz COFDM wireless video transmitter and receiver
K'áat chi'oba' Frecuentes
- Je'el, le rango frecuencia ku páajtal k'ex u 170Mhz (utsil tak 220Mhz) tak 860Mhz. Tune', je'el meyaj uts ti' le banda 260Mhz.
- Le frecuencia k'a'ana'an modificar u ti' le ti' jump'éelili' kuchil-ti' le transmisor yéetel le receptor. U causa, Le amplificador potencia yéetel u frecuencia le antena k'a'abéet u modificar le ti' jump'éelili' kuchil-frecuencia. (K'a'ana'an maan jump'éel amplificador potencia yéetel jump'éel antena utia'al u le transmisor yéetel le receptor cumplan yéetel u frecuencia cambiada.).
- Con el Fin de ma'alo'obkíinsiko'ob u sensibilidad u yaantal yéetel recepción, Le ancho banda frecuencia ku u beeta'al jach estrecho (Frecuencia tu'ux ±15MHz, Yo'olal le ancho banda k'a'ana'an u u 30Mhz). Le amplificador potencia ti' le transmisor yéetel u frecuencia le antena táan especialmente personalizados bin u frecuencia u necesites.
- Asab uts ken realizas jump'éel pedido, Much a'al ti' teen ba'ax jejelas frecuencia meyaj k'áabet. K ingenieros modificarán u frecuencia le transmisor yéetel le receptor, yéetel xan modificar le PA yéetel le antena personalizada de acuerdo con le rango frecuencia utia'al u garantizar le utsil sensibilidad ka soportar le asab nachil ti' Cancún yaantal.
- Le frecuencia predeterminada le 590Mhz, Yéetel 30Mhz (+/-15MHz), Je'el k'exik xma' modificar le amplificador potencia yéetel le antena. Je'ebix., 578MHz, 584MHz, 590MHz, 596MHz, ka 602Mhz.
- Wa k'áabet u modificar le frecuencia yéetel le ancho banda le transmisor, K'abéet jump'éel nu'ukula' yaabilajech ti' le placa configuración parámetros, Much wilo'obe' le wíimbala' u kaambal, Ma' jach jump'éel accesorio predeterminado, Much cómprelo ti' jump'éel u tojol adicional wa xook k bey ma' ordenar.
Je'el, Admite le envío vídeo yéetel datos UART Tak le transmisor yéetel le receptor.
Bix yaantal unidireccional, Yo'olal ma' u túuxtik le comando kanik tak le receptor ti' le transmisor.
Wa k'áabet túuxtik comandos u kanik jump'éel uláak' datos tak le receptor utia'al controlar uláak' dispositivos bey cámaras wa drones ti' le transmisor, Je'el ku ts'áabal jump'éel nu'ukulo'ob ti' u yaantal digital baratos, ti' máax ku To'one', ka páajtal k personalizar tu ti' tech.
Much compruebe le ye'esajil UART ti' le transmisor yéetel le receptor ti' le uláak' enlace. Much a'al ti' teen wa k'áato' yaantal jump'éel cable plomo. (Le je'o' predeterminado jach ma')
Le amplificador ku potencia predeterminado ti' le transmisor jach 2 Vatios, utia'al u páajtal u soportar 30 Kilómetro ti' le internet ichil visión.
Le uláak' wíimbala' jach k distancia probada tak le witso' tak tu jáal le k'áak'náabo'.
Wa k'áato' transmitir jump'éel alcance jach chowak, Je'el u páajtal u ya'abtal le amplificador potencia. Beyxan ti' kaambalilo'ob jump'éel vatio yéetel ka'ap'éel vatios, Bey xan u béeytal k meentik 5 Watts, 10 Watts, ka 20 vatios utia'al u elección. Le amplificadores jach nukuch xan requieren baterías asab nuuktako'ob yéetel bix sáasilo'...
Utia'al u PA 20W, le fuente alimentación k'a'ana'an u beel u 24 ~ 28 V. Chéen ti' 28 voltios je'el u páajtal u amplificador potencia kaxta'al u yúuchul le utsil trabajabilidad.
K ingeniero je'el u páajtal u k'ex le frecuencia ti' 300Mhz tak le 590Mhz predeterminados, Le antena, ka PA ti' le almacén ku 590Mhz, 300Mhz k'áabet ka'ap'éel semanas utia'al u personalizar, Yo'olal le k'iin k'u'ubul k'áabet asab k'iin u k 590Mhz predeterminados.
Paso 1: Much pulse OK yéetel le botón k'abil in wéet k'iin, Ku chíikpajal ti' le pantalla jump'éel menú u wa u k'a'ana'an ooks.
Paso 2: Pulse OK utia'al elegir Je'el utia'al ooks.
K'a'ajsik, Meyaj le antena nojochil wa jach chowak wa u tsol a Cha', Je'el kéen p'áatak jump'éel ma'alo'ob rendimiento recepción ti' le rango nojochil.
Le nu'ukulo'ob k'iini' predeterminado
- Transmisor SD ( PA 0.5W, 1W, 2W, 5W, 10W, 20W, 50W opcional bin u yaantal u pedido)
- Antena transmisora SD
- Receptor salida HDMI CVBS yéetel menú kaambalil yo'osal parámetros yéetel pantalla chan
- 0.8-medidor Antena receptora 1 PC. (Yaan ka'ap'éel tipos ti' instalación wa fijación le antena: 1. Antena k'oja'ano'obo' ventosa magnética, 2. Tuméen defecto Antena láaj jo'ochiko'obe' vidrio FRP ti' abrazadera bin yano'ob U )
- Opcional, Tarjeta configuración parámetros utia'al u transmisor vídeo inalámbrico.
(Wa k'áabet jump'éel antena k'oja'ano'obo' ventosa magnética, Le expreso wa u transportista u oksaj óoltik wa u magnéticos yik'áalil interferirán le seguridad u péepenk'áak'o', Yo'olal u tojol envío ka'anal asab u jump'éel antena abrazadera bin yano'ob U. )
Le dimensión predeterminada ti' le paquete le nu'ukulo'ob k'iini'
- 84*21*12CM
- Peso bruto 4.5KG
- Wa elige asab u 100 cm antena yéetel antena k'oja'ano'obo' ventosa magnética, Yaan agentes kuuch cobrarán tarifas adicionales, Bey tarifas extra chowak yéetel tarifas adicionales utia'al u artículos magnéticos u k'a'ankach.
- Le parámetro le transmisor configura le placa yaanal u le receptor. Le firmware placa configuración parámetros ka'ach jela'an u le transmisor yéetel le receptor, Ma' u páajtal biilankiltej indistintamente.
- Le parámetro transmisor configura u placa u ajustar le atenuación señal ti' le transmisor. Tumen 0.3db reducirá PA 0.5W.
K'áat chi': Ba'ax le páajtal k'ex le potencia salida. (PA meyajo'ob 0,5 W, 1 W, 2 W) ti' le placa configuración?
- Bix u tu núukaj ka'achij, Je'el u páajtal u ajustar le potencia salida configurando parámetros ATTEN ti' le nu'ukula' placa configuración parámetros ti' le transmisor. (Le nu'ukula' ma' analte'obo' yaan u paquete predeterminado, K'a'ana'an notificar u k'áato' yaantal le nu'ukula' ka betaj le pedido)
- Wa ka maan PA 2W, ts'o'okole' a configurar u 0.5W, 1W, Ba'ale' ma' u páajtal k'ex u 5W.
- Xan je'el u páajtal k k'uchul 5W, 10W, 20W, ka 50W wa K'abéet soportar chowak alcance.
Ma'.
Le transmisor video inalámbrico chéen admite cámara CVBS wa yaan tu video, Uláak' bin yano'ob cámara video k'áabet jump'éel máabeno' convertidora adicional.
Ma'. Jach COFDM (DVB-T'AANO') Ma'alo'ob.
Tune', le rango frecuencia COFDM le u 170-860 Mhz. Je'el u páajtal u soportar 477, 610, 675, 724, 816MHz, Ba'ale' ma' u soportar 970, 1180, 1230 MHz.
K transmisor bix yaabilajech je'el u páajtal u admitir tuláakal le rangos máako'ob síinajo'obo', Ba'ale' le receptor K'abéet biilankiltej u bloque u convertidor descendente.
Con el Fin de permitir u k t.u.m yaantal inalámbrica admita jump'éel rango asab amplio yéetel utsil intensidad señal, Ba'axten lo general, ajustamos frecuencia funcionamiento jump'éel ch'aaj determinado (170~860Mhz), yéetel u rango soportado u chéen asab o bey 15Mhz. Je'ebix., le frecuencia tu'ux le 590Mhz, le rango máximo ti' frecuencia bix k'a'ana'an u beel u 575 Mhz ~ 605 Mhz, Le PA yéetel le antena ku personalizan especialmente de acuerdo con le frecuencia tu'ux.
Láayli' teen jump'éel k'áat chi'?
Búukint u ti' máax ku To'one' tia'al a wojeltik.
Túuxta'al a k'áat chi'How to add a low-pass filter chip to the transmitter?
Some customers reported that when the distance between our transmitter and the GPS antenna is less than one meter, the transmitter will interfere with the work of the GPS through the transmitting antenna.
GPS satellite signals are divided into L1 and L2, with frequencies of 1575.42MHZ and 1228MHZ respectively. Our transmitter frequency is 595Mhz by default. If we encounter this situation, we can consider adding a low-pass filter, which means frequencies below 600Mhz. Frequencies above 600 MHz can be suppressed to avoid interference with other emitting electronic products.
There are two ways to add a filter. One is to add a filter IC to the COFDM-912T transmitter board, and the other is to add a filter box outside the transmitter. The down-pass filter can suppress frequencies below a certain frequency point, and the wave-pass filter can suppress the frequencies below a certain frequency point by allowing them to pass through.
