جهاز استقبال الفيديو اللاسلكي COFDM HDMI cvbs مدخل وحدة المغير الصغيرة RX لمسافات طويلة fpv uav

COFDM Wireless Video Receiver HDMI CVBS output

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

Work for COFDM-905T

 

HD digital wireless video transmission receiver COFDM-905R
Built-in Decoder board and COFDM dual-antenna receiving demodulation module, the whole machine adopts aluminum alloy casing, high receiving sensitivity, low decoding display delay, high-definition video output stable and clear.

سمات

1. Dual Antenna reception
2. Support working frequency range: 160ميجا هرتز ~ 860 ميجا هرتز, the center working frequency can be configured;
3. Wireless bandwidth is configurable;
4. The sensitivity of dual antenna reception -100±1dbm (QPSK 8MHz);
5. Wireless receiving status information (such as received signal strength, air interface rate, معدل البيانات, تردد العمل, wireless bandwidth, إلخ.) can be superimposed/not displayed on the video screen through the OSD switch button, or output to the serial port (customized) ;
6. Low-latency H264 video decoding, support 1080P@60 decoding playback;
7. Audio and video output (اتش دي ام اي, كفبس, USB port simultaneous output):
   1. HDMI Type A port audio and video output
   2. كفبس (Lotus Head) AV audio and video output
   3. Output video stream to the phone/tablet decoding display via USB port
8. Support video receiving and decrypting function (matching with video encryption at the transmitting end);
9. Support TF card or USB disk video recording;
10. Provide one-way single-direction transparent data transmission serial port;
11. Provide parameters to configure the serial port for working settings (such as center working frequency, wireless bandwidth, receiving decryption password);
12. مزود الطاقة: 6~15V, working power consumption is 230mA@12V.
13. Machine size: 115x90x34mm
14. Machine weight: 243 غرام

موصل:

1. ANT-in: واجهة هوائي إدخال الإشارة اللاسلكية, SMA ثقب داخلي ملولب خارجي
2. اتش دي ام اي: A type HDMI carrier, واجهة إخراج الصوت والفيديو عالية الوضوح
3. كفبس: واجهة إخراج الفيديو التناظرية
4. AL/AR: left and right channel analog audio output
5. قوة موصل: 3PIN 2.54mm socket
6. USB واجهة:
   1. External phone or tablet can be used to output audio and video to mobile phone or tablet for decoding display
   2. يمكن توصيل تسجيل الفيديو بمحرك أقراص USB خارجي أو قرص ثابت 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. الترددات اللاسلكية：338.0MHz BW：4.0ميغاهيرتز
      كيو بي إس كيه سي آر：2/3 جي：1/16
      هواء：3.90ميغابت في الثانية
      VBR：3.05Mbps AES OFF
      سيج1：27 سيج2：22
      بير1：0.14% ber2：100.00%
      REC OFF لا يوجد تخزين
   2. الترددات اللاسلكية indicates the center operating frequency, و الأسلحة البيولوجية indicates the working bandwidth.
      QPSK is the modulation mode, CR is the convolutional code rate, and GI is the guard interval.
      هواء is the air interface rate
      VBR is the video bitrate, إيقاف تشغيل AES means no encryption
      سيج1 refers to the received signal strength near the HDMI port antenna, و سيج2 refers to the other antenna.
      Ber1 refers to the BER error rate near the HDMI port antenna, و 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: مؤشر الطاقة.
13. CFG serial port: Parameter configuration Serial port, you can configure wireless receiving related parameters, such as center working frequency, wireless bandwidth, decryption password, إلخ. Vcan provides a matching parameter configuration panel SconB to facilitate user parameter setting.
14. منفذ تسلسلي للبيانات: 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.

ملحوظة

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. في هذه الحالة, 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 آنسة, and the delay of a famous brand sports camera at about 130 آنسة). 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, تردد العمل, wireless bandwidth, and transmitting and receiving antennas. Actual test results: a customer test, unmanned aircraft mounted ST100 transmitter to fly about 100 ارتفاع متر, 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.

موصل

مقاس

75 س 55 س 25 مم

RF Performance Test

تردد مركز التشغيل 470 ميجا هرتز, مضخم الطاقة: 1دبليو

تردد مركز التشغيل 700 ميجا هرتز, مضخم الطاقة: 1دبليو

Upgrade

How to upgrade TX from 720P to 1080P?