COFDM Wireless Video Transmitter et receptorem
Tabula contentorum
COFDM Wireless video transmitter and receiver Dimension
2-watt PA COFDM Wireless Video Transmitter
magnitudine: 90x65x22mm
The most recent advancements in COFDM (Coded Orthogonal Frequency Division Multiplexing) 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 tradenda, radio et digital. It’s also found in military and aerospace applications like satellite communications and unmanned aerial vehicles.
tandem, 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
Salve, I am looking for a long-range hd video transmitter with hdmi input and a receiver with hdmi output.
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.
Bene, 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 uel 128 encryption? the output format is full hd?
Etiam, COFDM-912T sustinet AES 128 encryption. Quaeso certiorem nos ad plus a Parameter configurationis tabulam ad constituendum AES128 ignoro cum ponatur ordo. Ad libitum est emere.
COFDM-912T transfusor solum SD720P initus subsidia Video. Etiam si accipiens HDMI output habet, non potest output realem 1080P summus definitionem video, nisi 720P.
Si altissima necessaria in definitione picturae output, Moneo te exemplar eligere ut tam transfusor quam accipientis subsidium 1080P, COFDM-908T
Can it reach 30 km around?
In the introduction of the wireless video systema transmissionis, omnia transmissione distantiae de quibus innituntur visibilis range (QUOD). 2WPA potentia in subsidiis amplificator 30 chiliometrorum et plerumque usus est in fuci. Altitudo valde alta et receptaculum super terram, 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. Ergo, the signal transmitted wirelessly is easily interfered with. So here are the suggestions:
1. Try to use a high-power transmitter, ut 10 Watts or 20 Watts. 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, autem repeater 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, camera, and battery?
Please infra picture. 
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 milliseconds, iustum?
With our 100 milliseconds, it’s about 300 ut 400.
We also have one with 30 milliseconds, 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(30km) 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?
Etiam, COFDM-912T supports transferring the serial data for you. Please infra picture. 
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.
Et respondendum est,: 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 metrum – 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?
Salve! We did extensive testing before ordering a bigger batch. And faced issues if combining the COFDM-912T transmitter with GPS.
Et respondendum est,:
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?”, Et respondendum est,: 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. Simul, 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.
Hoc video tibi ostendere posse nos unam addere video in-off switch in COFDM wireless video audio transmitter.
Video on, tunc transfusor video et audio simul transferet.
Vide off, tunc transfusor solum audio transferet.
Si consilium aliquod habes vel opus est ut munus de wireless video transmissionis et recipientis customize, placet liberum contactus nos.
Defectum potentiae amplificator est II-watt, nos etiam facere X-watt PA intus, sustinere longum spatium longius transferre.
2 Watts default 595Mhz with Yagi Directional Antenna and Omnidirectional antenna
300 Watts power amplifier modified 230Mhz COFDM wireless video transmitter and receiver
FAQs
- Etiam, frequentia rhoncus mutari ab 170Mhz (melior ex 220Mhz) ad 860Mhz*. Sic bene operari potest apud 260Mhz band.
- Frequentia immutanda est eidem in transmittente et recipiente. de causa, Potentia Amplifier et antennae frequentia eadem frequentia temperare debent. (Potestatem amplificantis et antennae emere debes pro transmisso et receptore ut obviam frequentia tua mutata sit).
- Ut ad meliorem sensum transmittendi et recipiendi, Sed frequentia plerumque angustissima (centrum frequency ±15Mhz, Sed ut 30Mhz). Potestatem ampliantis transmissionis et antennarum frequentiam specialiter nativus secundum frequentiam quam indigetis.
- Optimum est cum ponere ordinem, placet mihi quod genus opus frequency opus. fabrum nostrum frequentiam transmissionis et recipientis mitigabit, ac etiam PA et antennas consuetudinis secundum hanc frequentiam range modificare ut optimum sensum et sustentationem longissima tradenda procul.
- Default frequency est 590Mhz, cum 30Mhz* (+/-15Mhz), Potentiam amplificantis et antennae eam mutare sine modificatione potes. eg, 578Mhz, 584Mhz, 590Mhz, 596Mhz, et 602Mhz.
- Si necesse est frequentiam et bandwidth mitigare transfusor, vos postulo speciali instrumenti configurare tabulam parametri, videbis infra picture, non per default accessorius, Quaeso emas ad extra pretium vel contactum nos ante ordinationem.
Etiam, sustinet ut video et UART data ex transfusor et accipientis.
Sicut est unus modus tradendi, ideo non potest mittere imperium a recipiente ad transmittem.
Si mandata dominii vel alia data ab accipiente mittere debes ut alias machinas regendas sicut cameras vel fucos in transfusore, vos can add a paro of cheap digital tradendo apparatu, nobis loquere, et non possumus domicilii pro vobis.
Quaeso reprehendo UART definire in transfusor et receptor in inferiore pagina. Indica mihi si vis habere funem plumbeum. (default est)
Transfusor default Power Amplifier is 2 Watts, ut possit sustinere 30 KM at line-of-sight.
Infra picturam est nobis probata procul a monte ad oram maris.
Si vis longius transmittere, auget potentiam potes amplificator. Praeter unum Watt et Duo Watts, nos quoque facere 5 watts, 10 watts, et 20 Watts ad arbitrium. Ampliores amplificatores etiam ampliores gravidas et subsidia current.
Nam 20W PA, potestas copia debet esse 24~ 28V. Tantum at 28 volts potest consequi optimum potentia workability.
Ingeniarius noster frequentiam 300Mhz ex defectu 590Mhz mutare potest, Antennae, et PA in horreis sunt 590Mhz, 300Mhz duas hebdomades ut mos postulo, sic traditio temporis longior quam defectus 590Mhz eget.
Gradus 1: OK instare quaeso et ius puga simul, menu sive servare videtur in screen.
Gradus 2: Quaeso torcular OK eligere Ita servare.
Admone, quaeso uti maior vel longior antennae si vestri project concedit, potest meliorem receptionem perficientur in maioris range.
Defectus plenus paro
- SD Transmitter ( PA 0.5W, 1W, 2W, 5W, 10W, 20W, 50Ad libitum secundum ordinem vestrum W demanda)
- Antennae SD Transmitter
- HDMI CVBS output receptaculum cum parametri potestate menu et parvis velum
- 0.8-antenna meter receptor 1 pede. (Duo sunt genera institutionis vel figendi antennae: 1. magnetica potator basi antennae, 2. default U-genus Fibulae FRP fibreglass antennae )
- libitum, parametri configurationis tabulam pro wireless video transmitter.
(Antennae basi potator magnetico si opus est, expressa vel tabellarius cogitat producta magnetica impedire cum plano salute, sic naves pretium est altior quam U-genus Fibulae antennae. )
Quod default plenus paro sarcina dimensio
- 84*21*12CM
- Crassum pondus 4.5KG
- Si hac super 100cm antennae et magneticam potator basim antennae, Quidam feugiat adiutores et arguere extra fees, sicut extra longa feodis et extra feodis pro fortis magnetica items.
- Parameter transfusor tabulam configurat differt ab illa in recipiente. Firmware tabulae parametri figurae diversae sunt ab transmittente et accipiente, non possunt inuicem.
- Parameter transfusor tabulam configurat signum attenuationis in transfusore accommodare. Per 0.3db reducet 0.5W PA.
Quaeritur: Numquid potest mutare potentiam? (internum PA * 0,5 Latin, 1 Latin, 2 Latin) per lineam tabula?
- Ut supra respondit, you can adjust the output power by setting the parameters of ATTEN through the parameter configuration board tool on the transmitter. (This tool does not include the default package, you need to notify that you want to have this tool when you order)
- If you buy 2W PA, then you can set it 0.5W, 1W, but can not change it to 5W.
- We also can make it to 5W, 10W, 20W, and 50W if you need to support long-range.
No.
Hoc wireless video transmitter tantum sustinet CVBS camera vel video input, aliud genus video camera eget extra converter arca.
No. It is COFDM (DVB T-) technology.
So the COFDM frequency range is 170-860Mhz. It can support 477, 610, 675, 724, 816Mhz, but can not support 970, 1180, 1230 Mhz.
Our special model transmitter can support all the above ranges, but the receiver needs to use the downconverter block.
In order to allow our wireless transmitting system to support a wider range and better signal strength, we generally set the operating frequency to a certain point (170~860Mhz), and its supported range is only plus or minus 15Mhz. eg, the center frequency is 590Mhz, max support frequency range should be 575Mhz~605Mhz, The PA and antenna are specially customized according to this center frequency.
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, id frequentiis infra 600Mhz *. frequentiis supra 600 MHz opprimi potest ad vitare impedimentum cum aliis emissis electronicis productis.
Dupliciter adde filtrum. Unum filtrum IC addere ad tabulam transmittentem COFDM-912T, et alterum est extra cistam spargendi addere. In faucibus sparguntur frequentiae sub quadam frequentia punctum supprimere, et sparguntur undae frequentiae infra quamdam punctum frequentiam supprimi possunt permittens eas transire.
