Penerima Video Tanpa Wayar COFDM Modul modulator mini input cvbs HDMI RX jarak jauh fpv uav

Penerima Video Wayarles COFDM output CVBS HDMI

COFDM Wireless Video Receiver HDMI CVBS output mini modulator module long distance fpv UAV Data Transmission UART config Recorder

Bekerja untuk COFDM-905T

 

HD digital wireless video transmission receiver COFDM-905R
Papan Penyahkod terbina dalam dan modul penyahmodulasi penerimaan COFDM dwi antena, keseluruhan mesin menggunakan selongsong aloi aluminium, sensitiviti penerimaan yang tinggi, kelewatan paparan penyahkodan rendah, output video definisi tinggi stabil dan jelas.

ciri-ciri

1. Penerimaan Dwi Antena
2. Menyokong julat frekuensi kerja: 160MHz~860MHz, kekerapan kerja pusat boleh dikonfigurasikan;
3. Jalur lebar wayarles boleh dikonfigurasikan;
4. Kepekaan penerimaan dwi antena -100±1dbm (QPSK 8MHz);
5. Maklumat status penerimaan wayarles (seperti kekuatan isyarat yang diterima, kadar antara muka udara, kadar data, kekerapan bekerja, jalur lebar tanpa wayar, dan lain-lain.) boleh ditindih/tidak dipaparkan pada skrin video melalui butang suis OSD, atau output ke port bersiri (disesuaikan) ;
6. Penyahkodan video H264 kependaman rendah, menyokong main balik penyahkodan 1080P@60;
7. Output audio dan video (HDMI, CVBS, Port USB output serentak):
   1. HDMI Type A port audio and video output
   2. CVBS (Kepala Teratai) Output audio dan video AV
   3. Keluarkan strim video ke paparan penyahkodan telefon/tablet melalui port USB
8. Menyokong fungsi penerimaan dan penyahsulitan video (dipadankan dengan penyulitan video di hujung penghantaran);
9. Menyokong kad TF atau rakaman video cakera USB;
10. Menyediakan port bersiri penghantaran data telus satu arah satu arah;
11. Sediakan parameter untuk mengkonfigurasi port bersiri untuk tetapan berfungsi (seperti kekerapan kerja pusat, jalur lebar tanpa wayar, menerima kata laluan penyahsulitan);
12. Bekalan kuasa: 6~15V, penggunaan kuasa kerja ialah 230mA@12V.
13. Saiz mesin: 115x90x34mm
14. Berat mesin: 243 gram

Penyambung:

1. ANT-in: antara muka antena input isyarat wayarles, Lubang dalam berulir luar SMA
2. HDMI: Pembawa jenis HDMI, antara muka output audio dan video definisi tinggi
3. CVBS: antara muka keluaran video analog
4. AL/AR: left and right channel analog audio output
5. Kuasa penyambung: 3PIN 2.54mm socket
6. USB antara muka:
   1. External phone or tablet can be used to output audio and video to mobile phone or tablet for decoding display
   2. Rakaman video boleh disambungkan ke pemacu kilat USB luaran atau cakera keras USB
7. OSD button:
   The receiving status information displays the on/off button, and the long press button can switch the switch status, and the switch status will be powered off. When the reception status information display is turned on, it is displayed in red in the upper left corner of the output video screen:
   1. RF：338.0MHz BW：4.0MHz
      QPSK CR：2/3 GI：1/16
      AIR：3.90Mbps
      VBR：3.05Mbps AES OFF
      SIG1：27 SIG2：22
      ber1：0.14% ber2：100.00%
      REC OFF No Storage
   2. RF indicates the center operating frequency, dan BW indicates the working bandwidth.
      QPSK is the modulation mode, CR is the convolutional code rate, and GI is the guard interval.
      AIR is the air interface rate
      VBR is the video bitrate, AES OFF means no encryption
      SIG1 refers to the received signal strength near the HDMI port antenna, dan SIG2 refers to the other antenna.
      Ber1 refers to the BER error rate near the HDMI port antenna, dan ber2 refers to another antenna.
      REC OFF means no video storage
8. When the wireless receiving signal is interrupted or weak, the output video screen will be interrupted (the re-received signal screen will be automatically restored), and display: Disconnected, no signal
9. REC button: Video recording on/off button, short press button to switch state, start recording after power is detected. The system defaults to recording to the TF card. If the TF card is not inserted, it is recorded to the USB flash drive. If they are not inserted, they will not be recorded.
10. Link indicator: The wireless receiving link working status indicator lights up after the system is started and blinks when the receiving signal is normal.
11. REC indicator: The video recording indicator will flash at the low frequency when recording video, otherwise the high frequency will flash.
12. PWR indicator: Petunjuk Kuasa.
13. CFG serial port: Parameter configuration Serial port, you can configure wireless receiving related parameters, seperti kekerapan kerja pusat, jalur lebar tanpa wayar, decryption password, dan lain-lain. Vcan provides a matching parameter configuration panel SconB to facilitate user parameter setting.
14. Data serial port: Transparent data transmission serial port. The serial port data of the transmitter can be wirelessly transmitted to the receiver and output from the serial port.
15. TF card interface: Used for software upgrade maintenance or for storing video.

Nota

When the COFDM-905T transmitter and COFDM-905T receiver form a point-to-point wireless video transmission system, the video delay indicator:
The three indicators of video delay, video bit rate, and air interface rate are the mutual influence and mutual restraint. When the air interface rate is greater than 5 times the video code rate, the video delay is minimum. In this case, the actual test is that the video delay is about 60 ms when the code is transmitted at 720P@60, and the video delay is about 130 ms at 1080P@60. The delay refers to the delay from the HDMI video input at the transmitting end to the HDMI video output at the receiving end, excluding the delay of the front-end camera of the transmitting end (we measured the delay of a brand SLR camera at about 70 Cik, and the delay of a famous brand sports camera at about 130 Cik). For most application scenarios, the video delay is set to about 200ms by default.

When the COFDM-905T transmitter and the COFDM-905R receiver form a point-to-point wireless video transmission system, the transmission distance is:
The wireless transmission distance is related to many factors such as the test environment, ambient electromagnetic interference, occlusion conditions, air humidity, kekerapan bekerja, jalur lebar tanpa wayar, and transmitting and receiving antennas. Actual test results: a customer test, unmanned aircraft mounted ST100 transmitter to fly about 100 meters high, set to 4M QPSK wireless bandwidth, 700MHz center operating frequency, 1W transmit power, transmitter antenna 3dBi around, Receiving double glass fiber antenna gain of about 10dBi, distance of up to 16km (video smooth); our own road test in Shenzhen, the launch end on the flyover, ordinary hose antenna (about 3dBi gain), 340MHz launch, QPSK 8M Bandwidth, a fiberglass antenna at the receiving end, and a Yagi antenna, about 2.2 meters high on the pole, 2.2 kilometers away, high-definition video smooth, a small amount of high-rise buildings between the transmitter and receiver, the road visually about 20 degrees bending. Due to conditional restrictions, no further road tests were made.

Penyambung

Saiz

75 x 55 x 25 mm

Ujian Prestasi RF

Kekerapan Pusat Operasi 470MHz, Penguat Kuasa: 1W

Kekerapan Pusat Operasi 700MHz, Penguat Kuasa: 1W

Naik taraf

How to upgrade TX from 720P to 1080P?