COFDM Wireless Video Gudbiyaha iyo qaataha
Tusmada Tusmada
COFDM Wireless video transmitter and receiver Dimension
2-watt PA COFDM Wireless Video Transmitter
size: 90x65x22mm
The most recent advancements in COFDM (Isku-dhufashada Qaybta Soo noqnoqda Orthogonal Coded) 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, gudbinta video wireless, iyo radio digital. It’s also found in military and aerospace applications like satellite communications and unmanned aerial vehicles.
Ugu dambeyntii, recent advancements in COFDM wireless video transmitter and receiver technology have transformed the way video is transmitted and received. Farsamadan ayaa awood u siisay gudbinta muuqaalka sare ee shabakadaha wireless-ka, iyo sidoo kale gudbinta fiidiyowga ee shabakadaha iyo aaladaha kala duwan. Isticmaalka farsamooyinka codaynta ee horumarsan, sida sixitaanka khaladka hore (FEC) iyo habaynta la qabsiga, ayaa awooday tan.
5-watt PA COFDM Wireless Video Transmitter
5-Watt PA COFDM-912T Miisaanka
Package for one full set of the COFDM Wireless Video Transmitter
FAQ of the COFDM Wireless Video Transmitter and Receiver
hi, I am looking for a long-range hd video transmitter with hdmi input and a receiver with hdmi output.
Ma jeclaan lahayd a Hal wado ama laba dhinac nidaamka? Ilaa inta aad u baahan tahay inaad soo dirto fiidiyowga, Weli ma u baahan tahay inaad dirto hawlgalka xakamaynta ee drone-ka?
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.
OK, Xalka gudbinta fiidyaha ee wireless-ka ee hal-jidka dheer ah waa saldhigga tignoolajiyada COFDM (la mid ah DVB-T baahinta TV-ga dhijitaalka ah). Ma aha saldhigga internetka.
Does this COFDM wireless video transmitter and receiver have AES 256 ama 128 sirta? the output format is full hd?
Haa, COFDM-912T waxay taageertaa AES 128 sirta. Fadlan nagu soo wargeli in lagu daray 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 (THE). 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, iyo signalka bilaa-waayirka ah waxaa lagu kala qaadaa iyadoo la raacayo qaabka mawjada. Luminta calaamaduhu waa mid yar, faragelinta kale waa mid aad u yar.
Waxaad sheegtay in muuqaalka isticmaalkaagu yahay in gudbiyaha iyo qaataha labaduba ay dhulka yaallo, gaar ahaan meelaha saxaraha ah, waxaana laga yaabaa in ay jiraan dunyo ciid ah oo rogrogaya. Sidaa darteed, signalka lagu kala qaado wireless-ka si fudud ayaa loo farageliyaa. Hadaba waa kuwan talooyinka:
1. Isku day inaad isticmaasho gudbiye awood sare leh, sida 10 Watts ama 20 Watts. Qaar badan oo ka mid ah macaamiishayada markabka ayaa isticmaala gudbiye 20W.
2. Isku day inaad isticmaasho anteeno sare ama anteenada saar saqafka sare ama buur u dhow, oo waxaad sidoo kale kordhin kartaa anteenada tripod. Macaamiishayada ayaa had iyo jeer doorta qaar 1.8-mitirka FRP anteenada fiberglass-ka dhinac walba ahs.
3. Haddii shuruuduhu oggolaadaan, a soo noqnoqda Waxa kale oo lagu dari karaa si kor loogu qaado xoogga signalada iyo kordhinta fogaanta gudbinta. Soo-celinta waxa lagu hagaajin karaa meel sare ama saqafka gaadhiga socda.
How to assemble the wireless video transmitter, camera, and battery?
Fadlan fiiri sawirka hoose. 
Waxaa jira laba xiriiriye koronto at gudbiyaha, Xidhiidhiyaha cas waa 12V soo saarida kamaradda, xiriiriyaha madowna waa 12V gelin.
What is the lag or delay in milliseconds of your COFDM-912T?
200-300ms oo wata kamarad joogto ah iyo kormeere.
Kamarada caadiga ah iyo shaashadda waxay leeyihiin dib u dhac 200 rabtay, xaq u?
Anaga 100 rabtay, waxay ku saabsan tahay 300 si ay u 400.
Waxaan sidoo kale leenahay mid leh 30 rabtay, laakiin qiimuhu waa 6 marar badan
300 millise seconds waa la aqbali karaa haddii diyaaraddaadu ay leedahay shaqo ka hortag ah oo toos ah.
I noted your transmitter can support up to 30 kilometers in LOS. How far will it support in the NLOS environment?
Way adag tahay in la sheego baaxadda isticmaalka khadka-arag-la'aanta, waxay ku xidhan tahay inta caqabadood ee dhexda ka jira. Way adag tahay in la gudbiyo haddii biraha si buuxda u hareeraysan ama buuro ay xannibaan.
Deegaanka imtixaanku waa mid gaar ah, iyo masaafada laga helay imtixaanka ayaa sidoo kale ka duwan. Ma samayn karno wax dammaanad qaad ah ama ballan ah arrintan.
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?
Way adag tahay in la yiraahdo, waa inay ku xidhan tahay caqabadaha u dhexeeya gudbiyaha iyo qaataha. Kuma tijaabinno deegaankaaga isticmaalka, Markaa kuuma sheegi karo.
Alaab isku mid ah ayaa si kala duwan loogu faragalin doonaa deegaan kala duwan, iyo fogaanta gudbinta waa adag tahay in la yiraahdo. Kaliya baaritaanka dhabta ah ayaa ogaan doona.
Iibsade: Dhab ahaantii, Waxaan rakibnay qalab raadiyaha ah oo soo uruuriya dareeraha xogta oo u gudbiya xogtiisa meel 18km ah taliska dhexe. Qalliinku waa siman yahay waana ok.
Isla goobta ayaanu ku dhejin doonaa qalabka aanu kaaga iibsan doono.
Sidaad sheegtay, Kaliya imtixaan dhab ah ayaa ka jawaabi doona su'aalahayga oo dhan.
Can the COFDM-912T TX device output separate serial data?
Xogta waxa kaliya oo loo gudbin karaa hal jiho laga bilaabo gudbiyaha loona gudbinayo qaataha.
Haddii aad u baahan tahay inaad u gudbiso xogta labada dhinac, waxaad u baahan tahay inaad ku darto a telemetry raadiyaha dhijitaalka ah. (transceiver xogta wireless).
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?
Haa, COFDM-912T waxay taageertaa ku wareejinta xogta taxanaha ah adiga. Fadlan fiiri sawirka hoose. 
In this module where I can put up the camera? What type of camera is suited for this device?
Midka madow ee bidix wuxuu muujinayaa in yar oo sawirka kore ah, kaas oo ku xidhan kamarada.
Waxay taageertaa 720p CVBS kaamerada AV ka kooban. ama kamarad kasta oo HDMI ah oo HDMI ah oo loo beddelo sanduuqa beddelka AV.
How can I let the transmission still work well if I remove the menu and panel board from the receiver?
Ma jirtaa hab kasta oo lagu joojin karo guddiga kontoroolka si uu qofka qaataha ah uu u arko fiidiyowga gudbiyaha?
Haddii aan ka saaro guddiga kantaroolka qaataha, qaataha ma arko signal ka gudbiyaha.
Jawaab: Fadlan ka hubi su'aalaha la is weydiiyo ee ku jira linkiga hoose.
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 meter – 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.
Jawaab:
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?”, Jawaab: 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. Isla markaana, 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, fadlan nala soo xidhiidh.
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
- Haa, xadka soo noqnoqda waxaa laga beddeli karaa 170Mhz (fiican laga bilaabo 220Mhz) ilaa 860Mhz. Markaa waxay si fiican ugu shaqayn kartaa 260Mhz band.
- Inta jeer waa in wax laga beddelo oo la mid ah gudbiyaha iyo qaataha. Sabab, Amplifier-ka Korontada iyo inta jeer ee anteenada waa in ay wax ka beddelaan isla soo noqnoqoshada. (Waxaad u baahan tahay inaad u soo iibsato cod-weyneeye koronto iyo anteeno gudbiyaha iyo aqbalaha si aad ula kulanto inta jeer ee aad beddeshay).
- Si loo hagaajiyo dareenka gudbinta iyo helitaanka, bandwidth inta jeer waxaa guud ahaan laga dhigay mid aad u cidhiidhi ah (inta jeer ee xarunta ±15Mhz, marka bandwidth waa inuu noqdaa 30Mhz). Cod-weyneyeeyaha gudbinta iyo inta jeer ee anteenada ayaa si gaar ah loo habeeyey iyadoo loo eegayo inta jeer ee aad u baahan tahay.
- Way fiicantahay markaad dalbato, fadlan ii sheeg nooca soo noqnoqda shaqada ee aad u baahan tahay. Injineeradayadu waxay wax ka beddeli doonaan inta jeer ee gudbiyaha iyo qaataha, iyo sidoo kale wax ka beddel PA iyo anteenada caadada si waafaqsan xadkan soo noqnoqda si loo hubiyo dareenka ugu fiican oo loo taageero masaafada ugu dheer ee gudbinta.
- Inta jeer ee caadiga ah waa 590Mhz, Iyadoo 30Mhz (+/-15Mhz), Waad bedeli kartaa adigoon wax ka beddelin Power Amplifier iyo anteenada. Tusaale ahaan, 578Mhz, 584Mhz, 590Mhz, 596Mhz, iyo 602Mhz.
- Haddii aad u baahan tahay inaad wax ka beddesho inta jeer ee gudbiyaha iyo xawaaraha, waxaad u baahan tahay qalab gaar ah oo ka mid ah guddiga habaynta parameter-ka, fadlan fiiri sawirka hoose, ma aha qalab aan caadi ahayn, fadlan ku iibso kharash dheeri ah ama nala soo xidhiidh ka hor intaadan dalban.
Haa, waxa ay taageertaa in loo diro video iyo xogta UART ka gudbiyaha iyo qaataha.
Maaddaama ay tahay gudbinta hal dhinac, sidaas darteed uma soo diri karto amarka kantaroolka ee qaataha ilaa gudbiyaha.
Haddii aad u baahan tahay inaad ka soo dirto amarrada kantaroolka ama xogta kale ee qaataha si aad u maamusho aaladaha kale sida kamaradaha ama diyaaradaha aan duuliyaha lahayn ee gudbiyaha, waxaad ku dari kartaa qalab gudbinta dhijitaalka ah oo jaban, nala soo xiriir, waana kuu habayn karnaa.
Fadlan ka hubi UART qeexida gudbiyaha iyo qaataha xidhiidhka hoose. Fadlan ii sheeg haddii aad rabto inaad haysato fiilada rasaasta. (default waa maya)
Cod-weyneeye-gaabiyaha caadiga ah waa 2 Watts, si ay u taageerto 30 KM ee khadka-aragga.
Sawirka hoose waa fogaanteena la tijaabiyay ee buurta ilaa badda dhinaceeda.
Haddii aad rabto inaad gudbiso kala duwanaansho dheer, waxaad kordhin kartaa cod-weyneeye. Intaa waxaa dheer hal watt iyo laba watts, waxaan kaloo sameyn karnaa 5 watts, 10 watts, iyo 20 watts ee doorashadaada. Cod-weyneyaasha waaweyn waxay sidoo kale u baahan yihiin baytariyo waaweyn iyo taageerada hadda.
Loogu talagalay 20W PA, Korontadu waa inay noqotaa 24 ~ 28V. Kaliya at 28 Volts waxay awood u leedahay inay ku guulaysato shaqada ugu fiican.
Injineerkayagu waxa uu badeli karaa inta jeer ee 300Mhz ka 590Mhz caadiga ah, Anteenada, iyo PA ee bakhaarku waa 590Mhz, 300Mhz wuxuu u baahan yahay laba toddobaad si uu u habeeyo, marka waqtiga gaarsiinta wuxuu u baahan yahay in ka badan 590Mhz ee caadiga ah.
Talaabada 1: Fadlan riix OK iyo badhanka midig isku mar, liiska in la keydiyo ayaa shaashadda ka muuqda.
Talaabada 2: Fadlan riix OK si aad u doorato Haa si aad u keydiso.
Xusuusin, fadlan isticmaal anteenada ka weyn ama ka dheer haddii mashruucaagu kuu ogolaado, waxay heli kartaa waxqabadka soo dhaweynta ka wanaagsan ee baaxadda weyn.
Qaabka caadiga ah ee buuxa
- Gudbiyaha SD ( PA 0.5W, 1W, 2W, 5W, 10W, 20W, 50W ikhtiyaari ah iyadoo loo eegayo dalabkaaga)
- anteenada Gudbiyaha SD
- HDMI CVBS soo-saarka soo-saarka oo leh menu-ka kantaroolka cabbirka iyo shaashad yar
- 0.8-anteenada qaataha mitirka 1 kumbiyuutarada. (Waxaa jira laba nooc oo ah rakibidda ama hagaajinta anteenada: 1. magnetic sucker saldhigga anteenada, 2. default U-nooca xajinta anteenada FRP fiberglass )
- Ikhtiyaar, looxa qaabaynta xudunta u ah gudbiyaha fiidyaha bilaa-waayirka ah.
(Haddii aad u baahan tahay anteenada sucker base magnetic, sheyga ama sidayaalku waxay u maleynayaan in alaabta magnetic ay faragelin doonaan badbaadada diyaaraddooda, markaa qiimaha rarida ayaa ka sarreeya anteenada isku dhejinta nooca U-ah. )
Cabbirka xirmada go'an ee caadiga ah
- 84*21*12CM
- Miisaanka Guud 4.5KG
- Haddii aad doorato anteeno ka badan 100cm iyo anteeno saldhig suugista magnetic, Qaar ka mid ah kuwa xamuulka qaada ayaa qaadi doona kharash dheeraad ah, sida khidmadaha dheer ee dheeraadka ah iyo khidmadaha dheeraadka ah ee alaabta magnetic xooggan.
- Xakamaynta xudunta gudbiyaha waxay habaynaysaa sabuuradda way ka duwan tahay kan qaataha. Firmware-ka ku yaal sabuuradda habaynta cabbirka ayaa ka duwanayd gudbiyaha iyo qaataha, looma isticmaali karo si isku mid ah.
- Halbeegyada gudbiyaha ee looxa waxa uu habeeyaa waxa ay hagaajin kartaa dhunkashada calaamada gudbiyaha. 0.3dbkiiba waxa ay dhimi doontaa 0.5W PA.
su'aasha: Suurtagal ma tahay in la beddelo awoodda dibadda (gudaha PA 0,5 w, 1 w, 2 w) iyada oo loo marayo guddiga qaabeynta?
- Sida kor looga jawaabay, Waxaad hagaajin kartaa awoodda wax soo saarka adiga oo dejinaya cabbirrada ATTEN iyada oo loo marayo qalabka guddiga qaabeynta cabbirka ee gudbiyaha. (Qalabkani kuma jiro xirmada caadiga ah, waxaad u baahan tahay inaad ogeysiiso inaad rabto inaad haysato qalabkan markaad dalbato)
- Haddii aad iibsato 2W PA, markaa waxaad dejin kartaa 0.5W, 1W, laakiin uma beddeli karo 5W.
- Waxaan sidoo kale ka dhigi karnaa 5W, 10W, 20W, iyo 50W haddii aad u baahan tahay inaad taageerto meel fog.
No.
Gudbiyaha fiidyaha bilaa-waayirka ah waxa uu taageeraa kamarada CVBS ama galinta muqaalka, nooca kale ee kamarada video u baahan yahay sanduuqa beddelka dheeraad ah.
No. Waa COFDM (DVB-T) farsamada.
Markaa inta jeer ee COFDM waa 170-860Mhz. Way taageeri kartaa 477, 610, 675, 724, 816Mhz, laakiin ma taageeri karo 970, 1180, 1230 Mhz.
Gudbiyeha moodeelkayaga gaarka ah wuxuu taageeri karaa dhammaan noocyada kor ku xusan, laakiin qaataha wuxuu u baahan yahay inuu isticmaalo block-ka hoos u dhaca.
Si loo oggolaado nidaamkayaga gudbinta fiilo-wareenka inuu taageero baaxad ballaadhan iyo xoogga calaamada ka wanaagsan, guud ahaan waxaan dejinay inta jeer ee hawlgalka meel gaar ah (170~ 860Mhz), oo baaxadeeda la taageeray waa kaliya lagu daray ama laga jaray 15Mhz. Tusaale ahaan, inta jeer ee xarunta waa 590Mhz, inta jeer ee taageerada ugu badan waa inay noqotaa 575Mhz ~ 605Mhz, PA iyo anteenada si gaar ah ayaa loo habeeyey iyadoo loo eegayo inta jeer ee xaruntan.
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.
