COFDM Wireless Video Transmitter HDMI CVBS input
New COFDM Wireless Video Transmitter HDMI CVBS input mini modulator module long distance fpv UAV
Bezprzewodowy odbiornik wideo COFDM COFDM-905R
High-definition digital wireless transmission transmitter COFDM-905T has built-in encoder board, RCA COFDM modulation module, small-size PA power amplifier module (changeable 1W, 2W, 5W, 10W), the whole machine uses CNC aluminum alloy housing, mały rozmiar, lekka waga, high transmission resolution, long distance, niskie opóźnienie.
Cechy
- Supported audio and video input methods:
- Mini HDMI input (Digital)
- Wejście WYŁ (CVBS Analog, wideo, audio right, audio left)
- Video input system support:
- Mini HDMI: 1080 60P, 1080 50P, 1080 30P, 1080 25P, 1080 60I, 1080 50I, 1080 30I, 720 60P, 720 50P, 720 30P, …, różne sposoby adaptacji
- AV in: 720×480 60I (NTSC), 720×576 50I (KUMPEL), tryb adaptacyjny
- Video encoding: adopts H264 encoding technology and supports 1080P@60 at the maximum, backward compatible with other various resolutions and frame rate encoding.
- The video encoding bit rate can be set through the serial port configuration and the default adaptive air interface rate.
- COFDM modulation
- Configurable Convolutional Code Ratio: 1/2, 2/3, 3/4, 5/6, 7/8
- Configurable modulation method: QPSK/QAM16/QAM64
- IFFT mode: 2K
- Configurable guard interval: 1/4,1/8,1/16,1/32
- Configurable wireless bandwidth: 1MHz~8MHz adjustable, 1KHz stepping
- Output transmit power amplifier configurable
- Robocze pasmo częstotliwości: 160MHz~860MHz can be configured;
- Maximum transmission power: 1W or 2W;
- Provide one-way transparent data transmission serial port;
- Provides parameters for configuring the serial port and parameter configuration panel
- AES-256 encryption transmission
- Zasilanie: 10 ~ 13V, 12V best RF performance;
- Zużycie energii: The power consumption of the whole unit is about 14W when the transmit power is 1W;
- Overall size: 74 * 55 * 24.6mm
- Waga: 135G
Notatka
When the COFDM-905T transmitter and COFDM-905T receiver form a point-to-point wireless video transmission system, wskaźnik opóźnienia wideo:
Trzy wskaźniki opóźnienia wideo, 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, opóźnienie wideo jest minimalne. W tym przypadku, 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 przy 1080P przy 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, z wyłączeniem opóźnienia kamery przedniej strony nadawczej (we measured the delay of a brand SLR camera at about 70 SM, oraz opóźnienie kamery sportowej znanej marki o godz 130 SM). For most application scenarios, opóźnienie wideo jest domyślnie ustawione na około 200 ms.
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, częstotliwość robocza, przepustowość sieci bezprzewodowej, oraz anteny nadawcze i odbiorcze. Actual test results: test klienta, Bezzałogowy nadajnik ST100 montowany na statku powietrznym do latania 100 metrów wysokości, set to 4M QPSK wireless bandwidth, 700MHz center operating frequency, 1W moc transmisji, transmitter antenna 3dBi around, Odbierający podwójny zysk anteny z włókna szklanego około 10dBi, distance of up to 16km (wideo płynne); our own road test in Shenzhen, the launch end on the flyover, ordinary hose antenna (about 3dBi gain), 340uruchomienie MHz, Przepustowość QPSK 8M, a fiberglass antenna at the receiving end, oraz antenę Yagi, o 2.2 meters high on the pole, 2.2 kilometrów stąd, high-definition video smooth, a small amount of high-rise buildings between the transmitter and receiver, the road visually about 20 stopni zginania. Due to conditional restrictions, nie przeprowadzono dalszych testów drogowych.
Złącze
Rozmiar
75 X 55 X 25 mm
Test wydajności RF
Częstotliwość centrum operacyjnego 470 MHz, Wzmacniacz mocy: 1W
Częstotliwość centrum operacyjnego 700 MHz, Wzmacniacz mocy: 1W
Aktualizacja
How to upgrade TX from 720P to 1080P?
More TX Picture
Q & A
isdb-t.com_buyer –
I am absolutely blown away by the performance of this COFDM wireless video transmitter! The compact size is incredibly deceiving—this little module packs a serious punch. Setting it up was a breeze; I simply connected my camera’s HDMI output, powered it on, and it paired instantly with my receiver. The video transmission is exceptionally stable and crystal clear, even over impressively long distances that would cause other systems to fail. I’ve tested it extensively for FPV drone flights, and the low latency is remarkable, providing real-time feedback that feels instantaneous. The ability to also use CVBS input is a great backup option. The build quality feels robust and reliable. For any serious UAV pilot or professional requiring flawless, long-range video transmission, the 905T is an absolute game-changer and worth every penny. Highly recommended!