COFDM Kablosuz Video Alıcısı HDMI CVBS çıkışı
COFDM Wireless Video Receiver HDMI CVBS output mini modulator module long distance fpv UAV Data Transmission UART config Recorder
için çalışmak COFDM-905T
HD digital wireless video transmission receiver COFDM-905R
Dahili Dekoder kartı ve COFDM çift antenli demodülasyon modülü alma, tüm makine alüminyum alaşımlı kasayı benimser, yüksek alım hassasiyeti, düşük kod çözme görüntüleme gecikmesi, yüksek çözünürlüklü video çıkışı istikrarlı ve net.
İçindekiler
Özellikler
- Çift Anten alımı
- Destek çalışma frekans aralığı: 160MHz~860MHz, merkez çalışma frekansı yapılandırılabilir;
- Kablosuz bant genişliği yapılandırılabilir;
- Çift anten alımının hassasiyeti -100±1dbm (QPSK 8MHz);
- Kablosuz alma durumu bilgileri (alınan sinyal gücü gibi, hava arayüzü oranı, veri hızı, çalışma frekansı, kablosuz bant genişliği, vesaire.) OSD geçiş düğmesi aracılığıyla video ekranına eklenebilir/görüntülenmeyebilir, veya seri bağlantı noktasına çıkış (özelleştirilmiş) ;
- Düşük gecikmeli H264 video kod çözme, 1080P@60 kod çözme oynatmayı destekleyin;
- Ses ve video çıkışı (HDMI, CVBS, USB bağlantı noktası eşzamanlı çıkışı):
- HDMI Tip-A bağlantı noktası ses ve video çıkışı
- CVBS (Nilüfer Kafası) AV ses ve video çıkışı
- USB bağlantı noktası aracılığıyla video akışını telefon/tablet kod çözme ekranına aktarın
- Video alma ve şifre çözme işlevini destekleyin (iletim ucunda video şifrelemeyle eşleştirme);
- TF kartı veya USB disk video kaydını destekleyin;
- Tek yönlü tek yönlü şeffaf veri iletimi seri bağlantı noktası sağlayın;
- Çalışma ayarları için seri bağlantı noktasını yapılandırmak üzere parametreler sağlayın (merkez çalışma frekansı gibi, kablosuz bant genişliği, şifre çözme şifresi alma);
- Power supply: 6~15V, çalışma güç tüketimi 230mA@12V.
- Makine boyutu: 115x90x34mm
- Makine ağırlığı: 243 gram
Bağlayıcı:
- ANT-in: kablosuz sinyal girişi anten arayüzü, SMA dış dişli iç delik
- HDMI: A tipi HDMI taşıyıcısı, yüksek çözünürlüklü ses ve video çıkış arayüzü
- CVBS: analog video çıkış arayüzü
- AL/AR: left and right channel analog audio output
- Güç bağlayıcı: 3PIN 2.54mm socket
- USB arayüz:
- External phone or tablet can be used to output audio and video to mobile phone or tablet for decoding display
- Video kaydı harici bir USB flash sürücüye veya USB sabit diske bağlanabilir
- 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:- RF：338.0MHz Siyah Beyaz：4.0MHz
QPSK CR：2/3 GI：1/16
HAVA：3.90Mb/sn
VBR：3.05Mbps AES KAPALI
SIG1：27 SIG2：22
ber1：0.14% ber2：100.00%
KAYIT KAPALI Depolama Yok - RF indicates the center operating frequency, ve siyah beyaz indicates the working bandwidth.
QPSK is the modulation mode, CR is the convolutional code rate, and GI is the guard interval.
HAVA is the air interface rate
VBR is the video bitrate, AES KAPALI means no encryption
SIG1 refers to the received signal strength near the HDMI port antenna, ve SIG2 refers to the other antenna.
Ber1 refers to the BER error rate near the HDMI port antenna, ve ber2 refers to another antenna.
REC OFF means no video storage
- RF：338.0MHz Siyah Beyaz：4.0MHz
- 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: Bağlantı kesildi, sinyal yok
- 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.
- Bağlantı göstergesi: The wireless receiving link working status indicator lights up after the system is started and blinks when the receiving signal is normal.
- REC indicator: The video recording indicator will flash at the low frequency when recording video, otherwise the high frequency will flash.
- PWR indicator: Güç Göstergesi.
- CFG serial port: Parameter configuration Serial port, you can configure wireless receiving related parameters, merkez çalışma frekansı gibi, kablosuz bant genişliği, decryption password, vesaire. Vcan provides a matching parameter configuration panel SconB to facilitate user parameter setting.
- Veri seri bağlantı noktası: 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.
- TF kart arayüzü: Used for software upgrade maintenance or for storing video.
Not
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 mutual influence and mutual restraint. When the air interface rate is greater than 5 times the video code rate, the video delay is minimum. Bu durumda, the actual test is that the video delay is about 60 milliseconds when the code is transmitted at 720P@60, ve video gecikmesi yaklaşık 130 milliseconds 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 milisaniye, and the delay of a famous brand sports camera at about 130 milisaniye). 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, çalışma frekansı, kablosuz bant genişliği, and transmitting and receiving antennas. Actual test results: a customer test, unmanned aircraft-mounted ST100 transmitter to fly about 100 metre yüksekliğinde, 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, the 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, hakkında 2.2 meters high on the pole, 2.2 kilometre uzakta, high-definition video smooth, a small number 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.
Bağlayıcı
Boyut
75 X 55 X 25 mm
RF Performans Testi
Çalışma Merkezi Frekansı 470MHz, Güç Amplifikatörü: 1W
Çalışma Merkezi Frekansı 700MHz, Güç Amplifikatörü: 1W
Güncelleme
How to upgrade TX from 720P to 1080P?
Aleksey –
This is revolutionary for long-range FPV flights! This COFDM receiver provides incredibly stable HD video, even at distances of 10-100km and with super-low latency (150MS), even in dense urban environments with significant interference when flying my UAV. This tough, compact design fits seamlessly into my mobile workflow; HDMI, CVBS, and Ethernet outputs let me monitor footage in the field and archive it simultaneously using other systems. Its impressive weather resistance ensures a reliable signal, whether it’s scorching desert heat or a sudden downpour. Drone pilots needing broadcast-quality transmission without heavy equipment will find this small but powerful device far surpasses more expensive alternatives.