گیرنده بی سیم COFDM DVB-T Diversity با خروجی HDMI AV جریان IP RTSP UDP

گیرنده بی سیم COFDM DVB-T Diversity با خروجی HDMI AV جریان IP RTSP UDP

ویژگی

1. Dibcom 9090 Demodulator Tuner Chipset

   • پشتیبانی می کند diversity reception for improved stability and signal quality.

   • سازگار با DVB-T COFDM standard فقط (does نه support DVB-T2).

2. گزینه های خروجی ویدیو

   • پشتیبانی می کند HDMI digital video output.

   • پشتیبانی می کند CVBS analog video output for legacy devices.

3. Network Streaming

   • یکپارچه شده است RJ45 Ethernet interface.

   • پشتیبانی می کند RTSP and UDP video streaming for IP network applications.

DiBcom and Sony tuner chipset support diversity, but stopped to produce. So the cost is not cheaper.

گزینه های قابل تنظیم

1. Video Output Configuration

   • Choice between HDMI digital output, CVBS analog output, یا هر دو.

   • Resolution and frame rate settings for HDMI output.

2. Network Streaming Options

   • Enable or disable RTSP streaming.

   • Enable or disable UDP streaming.

   • Custom network port configuration for RTSP/UDP streams.

3. تیونر & Reception Settings

   • Frequency band selection within DVB-T range.

   • Add frequency down converter to support 860-6000MHz.

   • Adjustable RF gain or sensitivity settings.

   • Diversity reception options (single vs. dual antenna configuration).

4. فیزیکی & Interface Options

   • Housing type and size (به عنوان مثال, فشرده, قفسه سوار).

   • Connector types for HDMI, CVBS, و اترنت.

   • Optional external antenna connectors for enhanced reception.

5. سیستم عامل & سفارشی سازی نرم افزار

   • Custom GUI or web interface branding.

   • Pre-configured channel lists or scanning behavior.

   • Integration with existing IP monitoring or NVR systems.

6. گزینه های برق

   • Voltage range customization (به عنوان مثال, 5V, 12V, POE support).

   • Power-saving modes or remote power control.

پرسش و پاسخ

1. Why doesn’t the second LED flash?
   
   I just connected the second receiver (Rx), but it is not receiving any signal. The HDMI output displays the logo correctly, and all configuration settings appear to be correct. با این حال, I noticed that the bottom green LED labeled REC is not blinking, whereas on the previously working receiver, the REC LED blinks normally. Could you help me understand why this is happening?
   The light at the bottom is the recording LED. Earlier firmware versions used fast flashing and slow flashing to indicate recording status. Customer feedback suggested this wasn’t clear enough, so we’ve switched to off and on to indicate recording status. This LED only indicates the recording status; don’t overly focus on it; در عوض, pay attention to the working status indicator above.

   

2. Why does one of my two COFDM wireless video receivers work fine, while the other one doesn’t receive any channels?
   

   

   

   Please observe carefully. The operating frequency of the second HDMI wireless video receiver is not 340MHz. It is actually changed to 3400MHz, which is equivalent to 3.4GHz. Please change it to 340MHz. The frequency is within the range supported by COFDM and it should work normally.
3. Why does it take 5 minutes from powering on the machine to seeing the boot logo on HDMI ( Fighter Jet)?
   The engineer said that if there is a problem with the power supply, there is a watchdog on our board that will detect an unstable power supply and will repeatedly try to restart. It is likely a power-on startup problem. You can observe whether the red light on the board is flashing. Or take a video for us. A working COFDM video receiver takes only 10 seconds from booting up to seeing the HDMI and CVBS boot screens. https://youtu.be/H1tpzDId45o
4. What is the COFDM DVB-T Diversity Wireless Video Receiver?
   It is a professional-grade wireless video receiver using the Dibcom 9090 Demodulator Tuner Chipset, supporting DVB-T COFDM standard with diversity reception for stable, دوربرد, انتقال ویدئو با تاخیر کم.
5. Does this wireless video receiver support DVB-T2?
   خیر, it supports DVB-T COFDM only, not DVB-T2.
6. What is diversity reception, and why is it important?
   Diversity reception uses dual antennas to improve signal stability, reduce dropouts, and enhance video quality in challenging environments.
7. What video outputs are available?
   It supports HDMI digital output, CVBS analog video output, and RJ45 output ethernet video stream by RTSP or UDP, making it compatible with both modern and legacy devices.
8. Can it output video over IP networks?
   بله, it supports RTSP and UDP streaming via Ethernet (رابط RJ45), ideal for IP-based applications.
9. What video resolution does the receiver support?
   It supports up to 1080P@60 real-time decoding with low latency H.265/H.264 decoding.
10. What kind of audio and video inputs does it support?
    It can handle HDMI and AV input encoding from the transmitter, and provides audio decoding output.
11. Can it process two video inputs simultaneously?
    بله, it can optionally encode HDMI + AV inputs at the same time, though the default is single input (HDMI یا AV).
12. How is the device configured?
    You can configure it via Web UI, پورت سریال UART, or AT commands.
13. What is the supported working frequency range?
    It supports 160MHz~860MHz, with configurable center frequency. With the support of down-conversion, 160-6000MHz can also be supported.
14. Is the wireless bandwidth adjustable?
    بله, the bandwidth is fully configurable, supporting different transmission requirements.
15. What is the sensitivity of the dual antenna reception?
    The sensitivity is -100±1dBm (QPSK, 8پهنای باند مگاهرتز).
16. Can the device display wireless status on screen?
    بله, via OSD (نمایش روی صفحه), showing parameters like signal strength, نرخ بیت, فرکانس, پهنای باند, و غیره.
17. What kind of latency does the receiver achieve?
    Video latency can be as low as 60–130ms, depending on resolution and bitrate.
18. Does it support video decryption?
    بله, it can decrypt video streams if the transmitter uses encryption.
19. Can I record video directly on the receiver?
    بله, it supports recording to TF card or USB disk.
20. Does it support transparent serial data transmission?
    بله, it provides a data serial port for transparent transmission, allowing command/control data to pass through.
21. How much power does the receiver consume?
    Power consumption is about 230mA @ 12V.
22. What power input does it support?
    The receiver accepts 6V~15V DC input.
23. What are the device dimensions and weight?
    It measures 115 ایکس 90 x 34mm and weighs 243 گرم.
24. What antenna connectors are used?
    It uses SMA external threaded inner hole connectors.
25. What indicators are available on the device?
    It has Power (PWR), ارتباط دادن, and REC indicators.
26. How does the REC indicator work?
    It flashes slowly when recording video and quickly when idle.
27. What is the maximum wireless range of this receiver?
    With optimal conditions, it can achieve up to 16km transmission distance (using UAV and 1W transmitter).
28. How does the environment affect transmission distance?
    Factors such as interference, موانع, فرکانس, and antenna gain affect performance.
29. What video codecs are supported?
    It supports H.264 and H.265 decoding.
30. Can I connect the receiver to a mobile phone or tablet?
    بله, via USB output, it can stream to smartphones and tablets for decoding.
31. Can I adjust the encoding bitrate?
    بله, the video bitrate is dynamically configurable.
32. Does it support audio output?
    بله, both HDMI and CVBS (AL/AR) support audio output.
33. Can the OSD display be turned off?
    بله, you can enable/disable OSD with the OSD button or output via serial port.
34. What happens if the signal is lost?
    The receiver will display “Disconnected, no signal” until the link is restored.
35. Does it support AES encryption?
    بله, it supports AES encryption/decryption, depending on transmitter settings.
36. Can the receiver upgrade firmware?
    بله, via TF card interface for software updates.
37. Can the receiver output video simultaneously to multiple devices?
    بله, it supports HDMI, CVBS, and USB simultaneous outputs.
38. What is the air interface rate (هوا)?
    It is the wireless transmission data rate, displayed in real time on OSD.
39. Can I monitor BER (نرخ خطای بیت)?
    بله, BER per antenna is displayed on OSD or via serial port.
40. Is it suitable for UAV drone video transmission?
    بله, it is commonly used for drone and ground station applications.
41. Can I use it for vehicle-mounted video transmission?
    بله, it works for mobile video links, even in urban environments.
42. Is this receiver good for long-range surveillance?
    بله, it supports stable, دوربرد, low-latency wireless surveillance video.
43. Does it support low latency live video streaming?
    بله, it is optimized for real-time, low-latency video applications.
44. What kind of users typically need this device?
    It is ideal for UAV operators, حرفه ای های پخش, نظارت, and robotics applications.
45. Can it be integrated with IP video platforms?
    بله, via RTSP/UDP network streaming, it integrates easily with NVRs and IP video systems.
46. Does the device have a built-in web interface?
    بله, it provides a Web UI for remote configuration.
47. Can I use serial port commands for advanced settings?
    بله, via UART AT commands.
48. What accessories are typically used with this receiver?
    Optional common accessories include fiberglass omnidirectional antennas, آنتن یاگی, and input / output cable.
49. Is the receiver portable?
    بله, with its compact 243g design, it is lightweight and portable.
50. Does it support both fixed and mobile applications?
    بله, it is suitable for both stationary ground receivers and mobile vehicle/UAV operations.
51. How do I know if the receiver is recording video?
    The REC LED indicator flashes to show recording status.
52. Can I customize the frequency and bandwidth?
    بله, you can configure working frequency, پهنای باند, and other wireless parameters.
53. Why should I choose this receiver over others?
    Because it combines DVB-T COFDM diversity reception, HDMI/AV/IP outputs, تأخیر بسیار کم, ضبط کردن, رمزگذاری, and UAV compatibility—all in a compact, professional-grade design.
54. I have 1776-Rx with no CVBS and HDMI out. Would you send the schematic so I can verify the voltage?
    You should also look at other potential issues. Is the transmitter functioning correctly, and is it receiving video input while powered on? What is the current of Rx when it is turned on? Please check the Vcan1776-RX schematic here. SMTT SMTB
55. How do I replace the broken IC chip on the back of the wireless video transmitter?

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