COFDM Wireless Video Transmitter at Tatanggap
Talahanayan ng nilalaman
COFDM Wireless video transmiter at receiver Dimensyon
2-watt PA COFDM Wireless Video Transmitter
Ang laki: 90x65x22mm
Ang pinakahuling mga pagsulong sa COFDM (Coded Orthogonal Dalas Division Multiplexing) Ang wireless video transmitter at receiver technology ay nagbago kung paano ipinadala at natanggap ang video. Ang COFDM ay isang pamamaraan ng modulasyon na nagbibigay daan sa digital na data na maipadala sa isang malawak na hanay ng mga frequency, na nagreresulta sa isang mas maaasahang signal at pinahusay na paghahatid ng data.
Gumagamit kami ng teknolohiya ng COFDM sa maraming mga application, tulad ng digital television, wireless na paghahatid ng video, at digital radio. Matatagpuan din ito sa mga application ng militar at aerospace tulad ng satellite communications at unmanned aerial vehicles.
Sa wakas, kamakailang mga pagsulong sa COFDM wireless video transmiter at receiver teknolohiya ay nagbago ang paraan ng video ay ipinadala at natanggap. Pinagana ng teknolohiyang ito ang high definition video transmission sa mga wireless network, pati na rin ang paghahatid ng video sa iba't ibang mga network at aparato. Ang paggamit ng mga advanced na pamamaraan ng coding, tulad ng pasulong na pagwawasto ng error (FEC) at adaptive modulation, ay pinagana ito.
5-watt PA COFDM Wireless Video Transmitter
5-Watt PA COFDM-912T Timbang
Package para sa isang buong hanay ng COFDM Wireless Video Transmitter
FAQ ng COFDM Wireless Video Transmitter at Tatanggap
Hi, Naghahanap ako ng isang mahabang hanay ng hd video transmiter na may hdmi input at isang receiver na may hdmi output.
Gusto mo ba ng isang isang paraan o dalawang-paraan sistema ng? Hangga't kailangan mong ipadala ang video, kailangan pa bang ipadala ang control operation ng drone?
Magpadala lamang at tumanggap sa isang surveillance center. Ang ideya ay gamitin ang output ng HDMI ng remote control at muling ipadala ito sa gitnang. Ang drone ay may isang sistema upang magpadala sa internet, pero walang internet sa disyerto, kaya kailangan nating mag retransmit pero hindi sa internet.
OK, 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.
Mayroon bang AES ang COFDM wireless video transmitter at receiver na ito 256 o 128 encryption? ang format ng output ay full hd?
Oo, COFDM-912T supports AES 128 encryption. 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
Makakarating ba ito 30 km sa paligid?
In the introduction of the wireless video transmission system, all the transmission distances mentioned are based on the visible range (LOS). Sinusuportahan ng 2WPA power amplifier 30 kilometro at karaniwang ginagamit sa mga drone. Ang altitude ay napakataas at ang receiver ay nasa lupa, kaya may halatang height difference sa pagitan ng transmitter at ng receiver, at ang wireless signal ay ipinadala alinsunod sa waveform. Ang pagkawala ng signal ay maliit at iba pang panghihimasok ay napakaliit na kalat.
Nabanggit mo na ang iyong usage scenario ay parehong nasa lupa ang transmitter at receiver, lalo na sa mga lugar na disyerto, at baka may mga rolling sand dunes. Kaya nga, ang signal na ipinadala nang wireless ay madaling makagambala sa. Kaya narito ang mga mungkahi:
1. Subukan na gumamit ng isang mataas na kapangyarihan transmiter, tulad ng 10 Watts o 20 Watts. Marami sa aming mga customer ng barko ang gumagamit ng 20W transmitters.
2. Subukan mong gumamit ng mas mataas na antenna o ilagay ang antenna sa bubong o sa malapit na burol, at pwede mo ring dagdagan ang antenna tripod. Ang aming mga kliyente ay palaging pumili ng ilang 1.8-metro FRP omnidirectional fiberglass antennas.
3. Kung pinapayagan ng mga kondisyon, A repeater maaari ring idagdag upang mapahusay ang lakas ng signal at dagdagan ang distansya ng transmisyon. Ang repeater ay maaaring ayusin sa isang mataas na lugar o sa bubong ng isang gumagalaw na kotse.
Paano magtipon ng wireless video transmitter, camera, at baterya?
Mangyaring suriin ang larawan sa ibaba. 
May dalawang power connector sa transmitter, ang red connector ay 12V output para sa camera, at ang black connector ay 12V input.
What is the lag or delay in milliseconds of your COFDM-912T?
200-300ms sa isang regular na camera at monitor.
Normal na camera at screen ay may pagkaantala ng 200 milliseconds, kanan?
Sa ating 100 milliseconds, ito ay tungkol sa 300 upang 400.
Meron din kami nito sa 30 milliseconds, pero ang mahal naman 6 beses na
300 Ang milliseconds ay katanggap tanggap kung ang iyong eroplano ay may awtomatikong pag iwas sa balakid na function.
I noted your transmitter can support up to 30 kilometers in LOS. How far will it support in the NLOS environment?
Mahirap sabihin ang saklaw ng paggamit ng hindi linya ng paningin, depende yan kung ilang obstacles ang nasa gitna. Mahirap itong ipadala kung ganap na napapalibutan ng metal o bundok ang nakaharang dito.
Ang kapaligiran ng pagsubok ay natatangi, at iba rin ang layo na nakuha sa pagsusulit. Hindi kami maaaring gumawa ng anumang mga garantiya o pangako tungkol dito.
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?
Mahirap sabihin ang, dapat depende sa obstacles sa pagitan ng transmitter at receiver. Hindi namin ito sinusubok sa iyong kapaligiran sa paggamit, Kaya hindi ko masabi sa iyo.
Ang parehong produkto ay makikialam sa iba't ibang sa iba't ibang mga kapaligiran, at ang transmission distance ay mahirap sabihin. Tanging ang aktwal na pagsubok ang malalaman.
Mamimili: Sa totoo lang, 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?
Oo, COFDM-912T supports transferring the serial data for you. Mangyaring suriin ang larawan sa ibaba. 
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.
Ang sagot: 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 metro – 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?
Hi! We did extensive testing before ordering a bigger batch. And faced issues if combining the COFDM-912T transmitter with GPS.
Ang sagot:
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?”, Ang sagot: 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. Kasabay nito, 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, mangyaring makipag-ugnay sa amin.
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
FAQS
- Oo, the frequency range can be changed from 170Mhz (mas mabuting from 220Mhz) to 860Mhz. So it can work well at 260Mhz band.
- Ang dalas ay dapat baguhin sa parehong sa transmitter at tumanggap. Ng sanhi, ang Power Amplifier at antenna dalas ay dapat baguhin ang parehong dalas. (Kailangan mong bumili ng power amplifier at antenna para sa transmiter at receiver upang matugunan ang iyong binagong dalas).
- In order to improve the sensitivity of transmitting and receiving, the frequency bandwidth is generally made very narrow (center frequency ±15Mhz, so bandwidth should be 30Mhz). The power amplifier of the transmitter and the frequency of the antenna are specially customized according to the frequency you need.
- It is best when you place an order, please tell me what kind of working frequency you need. Our engineers will modify the frequency of the transmitter and receiver, and also modify the PA and custom antenna according to this frequency range to ensure the best sensitivity and support the longest transmission distance.
- Ang default na dalas ay 590Mhz, Sa 30Mhz (+/-15Mhz), maaari mong baguhin ito nang walang pagbabago ng Power Amplifier at antenna. Halimbawa, 578Mhz, 584Mhz, 590Mhz, 596Mhz, at 602Mhz.
- If you need to modify the transmitter frequency and bandwidth, you need a special tool of the parameter configure board, please see the below picture, it is not a default accessory, please buy it at an extra cost or contact us before ordering.
Oo, sinusuportahan nitong ipadala ang video at UART data mula sa transmitter at tumanggap.
Ito ay isang paraan ng transmission, kaya hindi nito maipadala ang kontrol command mula sa tumanggap sa transmitter.
Kung kailangan mong magpadala ng mga command ng kontrol o iba pang data mula sa receiver upang makontrol ang iba pang mga aparato tulad ng mga camera o drone sa transmiter, Maaari kang magdagdag ng isang hanay ng mga murang digital transmission equipment, makipag-ugnay sa amin, at maaari naming ipasadya ito para sa iyo.
Mangyaring suriin ang UART kahulugan sa transmitter at tumanggap sa ibaba ng link. Mangyaring sabihin sa akin kung nais mong magkaroon ng isang lead cable. (default ay hindi)
Ang default na default na Power Amplifier ay 2 Watts, kaya maaari itong suportahan 30 KM sa linya-of-sight.
Ang larawan sa ibaba ay ang aming sinubukan distansya mula sa bundok papunta sa dagat.
Kung nais mong magpadala ng mas mahabang hanay, pwede mo dagdagan ang power amplifier. Bukod sa isang watt at dalawang watts, pwede rin tayong gumawa ng 5 watts, 10 watts, at 20 watts para sa iyong pagpipilian. Ang mas malaking amplifier ay nangangailangan din ng mas malaking baterya at kasalukuyang suporta.
For 20W PA, the power supply should be 24~28V. Only at 28 volts can the power amplifier achieve the best workability.
Our engineer can change the frequency to 300Mhz from the default 590Mhz, The antenna, and PA in the warehouse are 590Mhz, 300Mhz needs two weeks to customize, kaya ang oras ng paghahatid ay nangangailangan ng mas mahaba kaysa sa aming default na 590Mhz.
Hakbang 1: Mangyaring pindutin ang OK at ang tamang button nang sabay-sabay, isang menu ng kung upang i-save ang lumilitaw sa screen.
Hakbang 2: Mangyaring pindutin ang OK para pumili ng Oo upang i-save.
Paalalahanan, Mangyaring gamitin ang mas malaki o mas mahabang antenna kung pinapayagan ng iyong proyekto, Maaari itong makakuha ng mas mahusay na pagganap ng reception sa mas malaking hanay.
Ang default na buong set
- Transmiter ng SD ( PA 0.5W, 1W, 2W, 5W, 10W, 20W, 50W opsyonal ayon sa iyong order demand)
- SD Transmitter antenna
- HDMI CVBS output receiver na may parameter control menu at maliit na screen
- 0.8-metro Receiver antenna 1 sa mga PC. (Mayroong dalawang uri ng pag install o pag aayos ng antenna: 1. magnetic sucker base antenna, 2. Default na U-type clamp FRP fiberglass antenna )
- Opsiyonal, parameter configuration board para sa wireless video transmiter.
(If you need a magnetic sucker base antenna, the express or carrier thinks the magnetic products will interfere with their plane safety, so the shipping cost is higher than a U-type clamp antenna. )
Ang default na buong set na sukat ng pakete
- 84*21*12CM
- Gross Weight 4.5KG
- If you choose over 100cm antenna and magnetic sucker base antenna, Ilang freight forwarders ang maniningil ng dagdag na bayad, tulad ng dagdag na mahabang bayad at dagdag na bayad para sa malakas na magnetic item.
- Ang transmitter parameter configures board ay naiiba mula sa isa sa receiver. Ang firmware sa parameter configure board ay naiiba mula sa transmiter at receiver, hindi sila maaaring gamitin nang magkakahalili.
- Ang transmiter parameter configure board ay maaaring ayusin ang signal attenuation sa transmiter. Per 0.3db will reduce the 0.5W PA.
Tanong: Is it possible to change the outpout power (internal PA 0,5 w, 1 w, 2 w) via the configuration board?
- As answered above, 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, at 50W kung kailangan mong suportahan ang mahabang hanay.
Hindi.
Sinusuportahan lamang ng wireless video transmitter na ito ang CVBS camera o video input, Iba pang uri ng video camera ay nangangailangan ng isang dagdag na converter box.
Hindi. Ito ay COFDM (DVB-T) teknolohiya.
Kaya ang COFDM frequency range ay 170-860Mhz. Maaari itong suportahan 477, 610, 675, 724, 816Mhz, pero di kayang suportahan 970, 1180, 1230 Mhz.
Ang aming espesyal na modelo transmiter ay maaaring suportahan ang lahat ng mga saklaw sa itaas, pero kailangan ng receiver na gamitin ang downconverter block.
Upang payagan ang aming wireless transmitting system upang suportahan ang isang mas malawak na hanay at mas mahusay na lakas ng signal, Karaniwan naming itinakda ang dalas ng pagpapatakbo sa isang tiyak na punto (170~ 860Mhz), at ang supported range nito ay plus or minus 15Mhz lang. Halimbawa, ang center frequency ay 590Mhz, max support frequency range dapat 575Mhz ~ 605Mhz, The PA and antenna are specially customized according to this center frequency.
Pa rin magkaroon ng isang katanungan?
Mangyaring makipag-ugnay sa amin para sa karagdagang impormasyon.
Ipadala ang Iyong TanongHow 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. Ang isa ay upang magdagdag ng isang filter IC sa COFDM-912T transmiter board, at ang isa pa ay magdagdag ng filter box sa labas ng transmitter. Ang down pass filter ay maaaring sugpuin ang mga frequency sa ibaba ng isang tiyak na dalas ng punto, at ang filter ng wave pass ay maaaring sugpuin ang mga frequency sa ibaba ng isang tiyak na dalas ng punto sa pamamagitan ng pagpapahintulot sa kanila na dumaan sa pamamagitan ng.
