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 langdistance COFDM HDMI-sender Trådløst videotransmissionssystem Modtager komplet sæt Audio Video TX RX til UAV Drone UGV 1080P
Feature
- Stærkt integreret, modulært kombineret design
- Brug af COFDM-moduleringsteknologi, H.264 image coding technology
- Den kan transmittere én kanal med 1080P HDMI (valgfri SDI) signal
- Lavere forsinkelse, the minimum end-to-end delay is 200~250 milliseconds, We also have a super-lower latency model of less than 30-50 millisekunder.
- All-round kommunikation, ikke bange for at bygge mure
- Hurtig kommunikation mellem rejser, the maximum moving speed can reach 600 km / time.
- Transmitter kølelegeme type aluminiumskasse, stødsikker, Waterproof case is optional.
- Support LOS og Non-line-of-sight (nationale kontaktpersoner) mobil transmission
- Afstanden er ikke mindre end 30 kilometer under synsfeltet ( Power amplifier and distance: 2 Watts PA 30km, 5 Watts PA 60KM, 10 Watts PA 100km, 20 Watts 150km at LOS)
- Synkron modtagelse af lyd- og videosignaler, high-definition HDMI1080P multi-format valgfri, standard-definition output DVD billedkvalitet
- Modtageren kan realisere videooptagelses- og backupfunktioner
- 128-bit AES-kryptering og dekryptering
- Fuld tilpasning tilgængelig
- Upgrade tool: Parameter Configure board
- Brug: UAV, Køretøjer & UGV
- Modulation: COFDM
- Working spænding: DC11V-DC13V
- Arbejde strøm: 0.5~ 2W (afhængig af forskellig PA)
- Transmission magt: 0.5W~20W optional
Indholdsfortegnelse
Ansøgning
Dette produkt bruges hovedsageligt til teknisk rekognoscering og bevisindsamling af offentlige sikkerheds- og sikkerhedskontrolafdelinger, billedtransmission i realtid af ubemandede luftfartøjer, ubemandede skibe, radio- og tv-relæ, radio og tv live-udsendelser: udsendelsesfelt, sport udsendelse, sociale nyheder, luft live, studie, bjergbestigning ekspedition, og andre aspekter. Det er velegnet til realtids mobil transmission af billeder i høj kvalitet i forskellige komplekse miljøer såsom byområder, have, og bjerge.
Senderspecifikation
moduleringsmetode | COFDM |
arbejdsspænding | DC11V ~ DC13V |
arbejdsstrøm | 0.5 Watt: ≤0,6A DC12V, 1 Watt: ≤0,8A DC12V, 2 Watt: ≤1.5A DC12V 5 Watt: ≤3,0A DC12V 10 Watt: ≤5.0A DC12V 20 Watt: ≤7.0A DC12V |
kontrolgrænseflade | standard RS232 interface, 8 Databit, 1 Stop Bit, Paritetsbit, Baudrate: 19200 |
gennemsigtig datagrænseflade, | en envejs gennemsigtig seriel porttransmission, 8 Databit, 1 Stop bit, støtte Odd Parity, Paritetsbit, Trådløs paritet, Baudrate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 |
krypteringsmetoder | understøtter 128-bit kryptering |
moduleringskortlægning | QPSK (4QAM), 16QAM, 64QAM |
fremad fejlkorrektion | 1/2 2/3 3/4 5/6 7/ 8 |
Guard interval | 1/32 1/16 1/8 1/4 |
Transportørnummer | 2K |
Frekvens båndbredde | 2 / 3 / 4 / 5 / 6 / 7 / 8M Justerbar |
transmissionskodestrøm | 2000kbs ~ 20000kbs Justerbar |
sendeeffekt | 0.5 / 1 / 2 / 5 / 10 Watt |
transmission frekvens | Enhver frekvens kan tilpasses, Trin 1MHz |
en kraftflade | inden for 10 MHz båndløs end 0,2 dB |
forholdet mellem skulderen | udgangseffekten på 27dB, skulderforhold er bedre end -30dB |
den anden harmoniske | ≤-45 dB |
MERE | 32Db |
input video | 720×480 60jeg(NTSC), 720×576 50jeg(PAL), 720 50P, 720 60P, 1080 50jeg, 1080 60jeg, 1080 24P, 1080 25P, 1080 30P, 1080 50P, forskellige tilstande er adaptive. |
HD interface | HDMI, SDI valgfri |
videokodningsformat | H.264 |
beskyttelsesstandard | hel-aluminium kølertype chassis, anti-korrosion, stødsikkert design |
Samlet størrelse | 9 x 6.4 x 2.3 cm |
Samlet vægt | ≤0,20 kg |
Modtager Specifikation
Maskine Rack-monteret multi-båndbredde HD-modtagerparametre | |
Modtag frekvensområde | 170-860MHz VHF&UHF |
frekvensbåndbredde | 2/3/4/5/6/7/8MHz, valgfri |
RF input niveau | -94dBm ~ -15dBm (8M båndbredde)/-98dBm ~ -15dBm (2M båndbredde) |
RF indgangsimpedans | 50 ohm |
RF indgangsstik | N-hoved |
demodulation mode | COFDM |
konstellationstilstand | QPSK, 16QAM, 64QAM (valgfri) |
fremad fejlkorrektion | 1/2, 2/3, 3/4, 5 /6,7/8 (valgfri) |
transportørnummer | 2k, |
vagt interval | 1/32, 1/16, 1/8, 1/4 (valgfri) |
videoafkodning | MPEG-2MP@ML/H.264 |
billedformat | 4: 3 16: 9 |
videobillede er | 720 * 576 @ 8MHz 1080P @ 60P |
lydoutputtilstand | stereo ubalanceret 300 / 200mv |
lydudgang | output2Audio + 2Video-udgang |
driftsspænding | AC220V / DC12V <0.5EN |
Driftstemperatur | – 20℃ ~ + 50 ℃ |
Udseende størrelse | 480*260*45 (1U) chassis |
udstyrets vægt | 1.5kg (tovejssprog 2,5 kg) |
Bemærk: standardstikket er HDMI, hvis du har brug for den billigere model, et stik til CVBS Gul videostik 720p HDMI, Vær venlig Tjek her til en anden model.
Beskrivelse:
– Denne enhed anvender COFDM-teknologi, som integrerer transmissionsantenne, digital modulering, lyd, og videofunktion.
– Kompakt størrelse, lille varme, og lang transmission rækkevidde
– kompatibel med et lille kamera, kunne muliggøre HD-billedoptagelse og transmission
– transmissionsrækkevidden vil være længere, hvis den anvender højforstærkningsantenne
– Transmissionsområde: 5000m (uden afbrydelse)/500M med forhindringer afbryder
Funktioner:
– Kompakt størrelse, moduleringsdesign
– Vedtager COFDM-moduleringsteknologi, MPEG-2 billedkomprimeringsteknologi
– Omnidirektionel kommunikation
– højhastighedskommunikation muliggør transmission af lyd og video i realtid
– En aluminiumskasse, der er stødsikker
– NLOS transmission
specifikationer:
Transmitter:
– Størrelse:90x64x23mm
– vægt:200g
– antenne:22mm
Modtager
– størrelse: 87x70x20mm
– vægt:200g
– Antennehøjde:42.5cm (kunne bøjes)
Teknisk specifikation
– Modulation: COFDM
– arbejdsspænding: DC11V-DC13V
– Arbejde strøm:0.5W: mindre end 0,6A @ DC12V
– kontrolport: standrad RS232-port. 8-bit databit, 1-bit stopbit, Baudrate:19200, understøtter ulige paritetskontrol
– transmissionsdataport:8 bit databit,1 bit stopbit, Baudrate,1200,2400,4800,9600,19200,38400,57600,115200,230400
– Kryptering: support 128 kryptering
– Modulation kortlægning: QPSK (4QAM),16QAM,64QQAM
– Fremad fejlkorrektion: 1/2,2/3,3/4,5/6,7/8
– Beskyt intervallet: 1/32,1/16,1/8,1/4
– Transportørnummer:2K
– Frekvens båndbredde:2/3/4/5/6/7/8M justerbar
– transportstrøm:2000kbs-20000kbs justerbar
– transmissionskraft: 2W
– transmission frekvens: kunne tilpasses, trin er 1 MHz
– magt fladhed: mindre end 0,2 dB inden for 10 MHz
– Anden harmoniske: mindre end -45db
– MERE:32db
– input video:1Vp-p,75ohm
– Video programformat: MPEG-2
– Videokvalitet: 720×576 når over 4M
– Format: NTSC og PAL kunne indstilles
Modtager teknisk specifikation:
– Modtagerfrekvensområde: 170-860Mhz, VHF og UHF
– Frekvens båndbredde: 2/3/4/5/6/7/8 Mhz, justerbar
– RF input niveau:-94DBM-0dbm ved 8M / -98dbm-0dbm ved 2M
– RF indgangsimpedans: 50ohm
– RF-indgangsport: High School
– modulering: COFDM
– Konstellationsvejen: QPSK,16QAM,64QAM valgfri
– Fremad fejlkorrektion: 1/2,2/3,3/4,5/6,7/8 valgfri
– Transportørnummer:2K
– Beskyttelsesgab:1/32,1/16,1/8,1/4
– Skærmhastighed:4:3,16:9
– videobillede:720×576 @ 6Mhz
– Port til lyd og video: standard 3.5 Havn
– Working spænding: DC12V 0,3A
Pakke inkluderet:
– 1 x sender
– 1 x modtager
– 1 sæt x tilbehør
30Km long distance COFDM HDMI Wireless Video Transmitter
FAQ
Spørgsmål 1: Jeg har brug for mindst 30 km rækkevidde fra luft til jord til UAV UGV USV.
Svar 1:Vores system understøtter det, det skal bruge en 2W effektforstærker, det er bedre at bruge den specielle lange senderantenne og to højere modtagerantenner.
COFDM-912T VS COFDM-908T
Spørgsmål 2: Hvor langt kan jeg komme, hvis jeg bruger både sender og modtager på jorden?
Svar: Ved jordbrug, sender og modtager skal have en vis højdeforskel for at kunne transmittere lange afstande.
Den længste distance er kun 2.5 kilometer, hvis sender og modtager begge er i samme højde på jorden. Se venligst vores testvideo; fordi sender og modtager er placeret på forskellige niveauer, den ene side er ved bjerget, en anden side er ved havet, vi brugte standard to watt til at transmittere 27 kilometer.
Spørgsmål 3: Understøtter det et arbejdsmiljø af -20 grader?
Svar: Ja, understøttet
Spørgsmål 4: Jeg vil gerne købe moduler og indbyggede enheder, Fortæl mig venligst dimensionen af disse moduler.
Svar: SD model: 6X7x1,6 cm, HD model: 5X7x1,6 cm
Spørgsmål 5:Do you have any special case shells for marine use?
Svar: Ja, Tjek venligst nedenstående billede. (For the transmitter with a three-proof shell, vandtæt, stødsikker, anti-salt spray, 防水,防震,防盐雾)
Precautions for order customization
- Frekvens: Please tell me what frequency you need as the default center frequency. Please choose from 170-860Mhz.
- Antenne længde: Please tell us the length you want for the 1-piece transmitter and 2-piece receiver antenna. (receiver antenna length has 0.8 eller 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/.
Ofte stillede spørgsmål
Q. What is the video resolution?
EN: HDMI 1080P.
Q. Does the transmitter power current is high?
EN: Til Transmitter, the different PA (effektforstærker) inde, the current is different. 20W 6-7A, 10W 5A, 5W 3A, 1-2W 1.6A
Til Modtager, the current is only 0.3EN (300mA)
Q: Like we only need 10km, how much PA is recommended?
EN: 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 kilometer. 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?
EN: 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.
EN: 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?
EN: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?
EN: 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.
For eksempel, 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 meter.
- 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 | DET | nationale kontaktpersoner |
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. For eksempel, 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 timer.
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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.
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Not on the transmitter. Because COFDM is a one-way transmission, 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.
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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.
- Ja, the wireless video signal reception is improved by using Yagi and omni-directional antennas.
- Ja, we can build the transmission of telemetry and video in COFDM-908T.
- Først, 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 watt. 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
- Her er nogle overensstemmelser mellem udgangseffekten og dBm-parametrene, der vises af instrumentet.
- 20mW er 13dBm
200mW er 23dBm
1 Watt er 30dBm
2 Watt er 33dBm
5 Watt er 37dBm
10 Watt er 40dBm
20 Watt er 43dBm
50 Watt er 47dBm
100 Watt er 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.
Ja, 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, 1080Trådløs videosender SDI til kamera med lang rækkevidde COFDM UAV UGV downlink transmission, 1080Trådløs videosender SDI til kamera med lang rækkevidde COFDM UAV UGV downlink transmission
I øjeblikket, it does not support 1080i, nor does it support 4K transmission.
20km over havet HDMI trådløs videosender og modtager test til båd eller fra land til skib
Long-range 20 Watts Power Amplifier Transmitter and Receiver needs a 12V 6A power supply
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