HDMI Wireless Video Transmitter and Receiver COFDM-908T

Q. Dè an rèiteachadh bhidio?
Tha: HDMI 1080P.

Q. A bheil sruth cumhachd an inneal-sgaoilidh àrd?
Tha: Airson chraobh-sgaoilidh, an diofar PA (amplifier cumhachd) a-staigh, tha an sruth eadar-dhealaichte. 20W 6-7A, 10W5A, 5W 3A, 1-2W 1.6A

Airson trusaidh, chan eil ann an-dràsta ach 0.3Tha (300MA)

Q: Mar sin chan fheum sinn ach 10km, dè an ìre PA a thathar a’ moladh?
Tha: Leis gu bheil an inneal-sgaoilidh agus an cuidhteas agad air an cleachdadh air an talamh, eu-coltach ri drones, tha àirde an inneal-sgaoilidh agus an cuidhteas gu math eadar-dhealaichte. Thathas a’ moladh inneal-sgaoilidh 10W PA a chleachdadh airson 10 cilemeatair. Feumaidh tu cuideachd beachdachadh gu bheil do ghlacadair air a chuir a-steach don chàr, agus cumaidh e a’ gluasad aig astar àrd aig àm sam bith. Is e dìreach inneal-sgaoilidh àrd-chumhachd as urrainn dèanamh cinnteach à seasmhachd chomharran aig a’ ghlacadair.

Q: Dè an tricead a tha nas fheàrr? 2.4G no 5.8G?
Tha: Is e an raon tricead Cofdm 170 ~ 860Mhz.
Tha stuthan againn cuideachd a chleachdas 2.4G no 5.8G, ach tha raon an dà eadar-ama seo co-ionann ri tricead WiFi, a bheir gu mòr bacadh air an tar-chuir le WiFi, agus thèid an astar tar-chuir a ghiorrachadh gu mòr.
Ma tha comharran Tbh didseatach DVB-T gu h-ionadail, feuch ri triceadan anns na raointean sin a sheachnadh nuair a bhios tu a’ taghadh triceadan.

Q: An urrainn do luchd-ceannach am tricead atharrachadh leotha fhèin? Ma tha an tricead air a chleachdadh uaireannan.
Tha: Is e tricead àbhaisteach an ionaid 595Mhz, San fharsaingeachd tha leud-bann +/- 15Mhz, a tha 30 Mhz, agus faodar an raon tricead atharrachadh. (580-610Mhz).
Seachad air an raon seo, feumar an antenna agus an PA atharrachadh a rèir tricead an ionaid seo.

Q:Ciamar a bhios an neach-ceannach ag atharrachadh tricead an inneal-sgaoilidh no an cuidhteas? A bheil bathar-bog sam bith ann airson tricead atharrachadh?
Tha:It's very easy, faodaidh an inneal-sgaoilidh am bòrd-cuideachaidh a chleachdadh ri taobh an deilbh, and the receiver's assistant board is on the fuselage, le sgrion agus putanan.

Ach chan eilear a’ moladh do luchd-ceannach atharrachadh, oir uaireannan dh'atharraich e crìochan an inneal-sgaoilidh ach cha do dh'atharraich e crìochan a 'ghlacadair, ag ràdh nach fhaigheadh ​​e an comharra.

Q: An urrainn dhomh an amplifier cumhachd air an inneal-sgaoilidh atharrachadh?
Tha: Faodaidh an neach-cleachdaidh an fhìor chumhachd toraidh a lughdachadh le bhith a’ meudachadh bacadh cumhachd àrd, ach chan urrainn dha inneal-sgaoilidh an PA cumhachd ìosal àrdachadh.
Mar eisimpleir, 10Faodaidh W PA atharrachadh gu 5W PA, ach chan urrainn dhaibh 5W PA atharrachadh gu 10W.

1. Chan urrainn dha duine innse dhut an dearbh astar tar-chuir. Leis gu bheil an astar tar-chuir an urra ri àirde an antenna transceiver agad agus an seòrsa agus tiugh de chnapan-starra, co-dhiù an gabh an comharra tar-chuir a sgaradh, co-dhiù a tha bacadh air tricead gnàthach, msaa.
2. Tha craobhan neo beinn sa mheadhan, agus tha an astar tar-chuir eadar-dhealaichte.
3. Tha e duilich innse dhut mu astar tar-chuir ceart, tha tiugh aig eadhon na ballachan, san fharsaingeachd 500-1000 meatair.
4. Feuch an toir thu sùil air a’ bhidio deuchainn againn, ma tha thu a’ smaoineachadh gu bheil e iomchaidh, faodaidh tu sampall a cheannach airson deuchainn, mura h-eil thu riaraichte, faodaidh tu a thilleadh thugainn.
5. Seo foirm airson COFDM PA agus astar tar-chuir LOS agus NLOS airson na h-iomraidhean agad.

A-nis tha COFDM-908T a’ toirt taic do H.264, chan e H265.

Taic as àirde 1080 50P. Tha sinn air sin a dhearbhadh aig 1080P60, bidh am frèam ceangailte, no bidh an aithne neo-iomlan

1. Tha caitheamh cumhachd co-ionann ri bholtachd amannan gnàthach. Mar eisimpleir, airson inneal-sgaoilidh 10W, an-diugh na sheasamh aig 5.5A, agus tha an bholtadh 12V, mar sin is e an caitheamh cumhachd aige 66W.
2. Ma dh'ullaicheas tu bataraidh ath-thagraidh 1000W agus cleachd inneal-sgaoilidh 10W PA, Thathas a 'meas gun urrainn dhut 1000W a chleachdadh air a roinn le 66W, a tha co-ionann ri 15 uair a thìde.

1. Co-dhiù a tha an ceangal eadar an inneal-sgaoilidh agus an cuidhteas math no a bheil neart nan comharran ri fhaicinn air an sgrion bheag aig a’ ghlacadair COFDM.
2. Chan ann air an inneal-sgaoilidh. Leis gur e tar-chuir aon-shligheach a th’ ann an COFDM, chan fhaod ach an cuidhteas fhaighinn neart comharra an tar-chuir agus an sealltainn air an sgrion. Ma dh’ fheumas an inneal-sgaoilidh na comharran sin fhaicinn, feumar seata de dh’ innealan tar-chuir dàta a chuir ris gus an comharra inbhe a ghluasad bhon ghlacadair chun inneal-sgaoilidh agus an taisbeanadh leis an t-solas comharra.
3. Faodaidh an gnìomh seo a bhith aig inneal-sgaoilidh agus cuidhteas tar-chuir dà-shligheach, agus thathas a’ moladh inneal tar-chuir dà-thaobhach a thaghadh.

1. First of all the frequency is correct.
2. 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.

1. Tha, the wireless video signal reception is improved by using Yagi and omni-directional antennas.

2. 

3. 

1. Tha, we can build the transmission of telemetry and video in COFDM-908T.

2. The below model of transmission of telemetry is recommended.

   https://ivcan.com/p/digital-data-link-for-drones-and-robotics/

   

1. A 'chiad, the 10-watt RF linear amplifier and the 20-watt RF linear amplifier use the same cavity, which is machined by a CNC mill.
2. 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.
3. This product actually has 20 uat. 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）
4. Test video at youtube: https://www.youtube.com/shorts/jfNoZeb1BIA
5. Here are some correspondences between the output power and the dBm parameters displayed by the instrument.
6. 20mW is 13dBm
   200mW is 23dBm
   1 Watts is 30dBm
   2 Watts is 33dBm
   5 Watts is 37dBm
   10 Watts is 40dBm
   20 Watts is 43dBm
   50 Watts is 47dBm
   100 Watts is 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.

Tha, 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, 1080Cruthan bhidio, 1080Cruthan bhidio
-dràsta, it does not support 1080i, nor does it support 4K transmission.