1350-1400Mhz 20W PA COFDM SDI wireless video transmitter and receiver

Feature

1. The operating frequency can be customized. The frequency range of the transmitter is 70~2500Mhz, and the frequency range of the receiver is 170~860Mhz. Operating frequencies exceeding this range require down-conversion.
2. The frequency range required by the customer for this set of equipment was 1350-1400Mhz, so the receiver is a diverse dual-antenna reception, so two down-converters were added. (1350-1400Mhz input, output 370Mhz, LO 1000Mhz)

Accessory

FAQ

1. Q: What is this 1.4GHz 20W PA COFDM SDI wireless video transmitter and receiver?
   A: It’s a professional long-range wireless video transmitter and receiver kit operating in the 1350-1400MHz frequency band (Other frequencies can also be customized.), using robust COFDM modulation for reliable SDI, CVBS, or HDMI AHD video input transmission, with HDMI, CVBS and Ethernet RJ45 RTSP UDP output. It features a programmable 10 Watts or 20 Watts Power Amplifier (Other powers can also be customized).
   

2. Q: What video inputs does the transmitter accept?
   A: The wireless video transmitter supports SDI video input, CVBS video input (composite), and other standard HDMI AHD video input.
   

3. Q: What outputs does the receiver provide?
   A: The COFDM receiver offers both HDMI output for modern displays and CVBS output (composite) for legacy equipment compatibility, The ethernet RJ45 networking output also support to connect computer via RTSP or UDP protocol video stream.
   

4. Q: How much power does the transmitter output?
   A: The PA power amplifier is customizable, offering either 10 watts or 20 watts output power, selectable via configuration tools for range or power consumption needs. (Other powers can also be customized).
   

5. Q: What frequency band does it use?
   A: It operates specifically within the 1350-1400MHz frequency band (also referred to as 1.4G frequency). (Other frequencies can also be customized.),
   

6. Q: What modulation does it use for reliable video?
   A: It employs COFDM modulation, renowned for excellent performance in non-line-of-sight (NLOS) and multipath environments, making it ideal for long-range transmission.
   

7. Q: How is the system configured?
   A: Configuration is done via a dedicated parameter configuration tool or using AT commands through the CFG port, Web UI management for video encoder parameter setting.
   

8. Q: Does it support remote configuration?
   A: Yes, parameters like frequency, bandwidth, power, password, Gain, etc., can be set using the programmer tool, Parameter Configuration board or by sending AT commands via the CFG port.
   

9. Q: What is the TTL data port used for?
   A: The TTL data port allows for TTL data transmission of flight control in the drone air unit alongside video. It can be used for remote control, telemetry, triggering, or sending/receiving low-bandwidth serial data (one-way on TX typically).
   

10. Q: Is the video transmission bidirectional?
    A: No, this system is designed for one-way transmission of video and data from the transmitter to the receiver. Or please check our other models supports two-way transmission.
    

11. Q: What kind of range can I expect?
    A: Range depends on terrain, antenna, and power setting. With the 20W PA and good antennas, long-range transmission of 100-150+ km (line-of-sight) is achievable. COFDM aids in difficult environments.
    

12. Q: How do I choose between 10W and 20W power?
    A: Default is 20W PA inside. Use the parameter configuration tool to set Gain, A 3 dB reduction means the output is halved; so a reduction from 20W to 10W means a 3 dB reduction in gain. Choose 10 watts or 20 watts on the PA power amplifier, please consider higher power extends range but consumes more battery.
    

13. Q: Does it support low-latency video?
    A: Yes, COFDM wireless video systems typically offer very low latency (often sub-150ms), suitable for live monitoring and Drone UAV applications.
    

14. Q: What antennas are recommended?
    A: High-gain directional antennas (Yagi antenna, Flat Panel antenna) on the receiver and omnidirectional/semi-directional antennas on the transmitter are recommended for maximizing long-range transmission performance at 1.4G frequency.
    

15. Q: Is the 1350-1400MHz band license-free?
    A: Licensing varies significantly by country/region. The 1350-1400MHz frequency band is NOT globally license-free. Always check local regulations before operation. A license is often required, especially for 20W power.
    

16. Q: Can I change the operating frequency?
    A: Yes, the operating frequency within the 1350-1400MHz range can be precisely set using the parameter configuration tool or AT commands.
    

17. Q: How do I update the firmware?
    A: Firmware updates are typically performed using the programmer tool software connected to the device’s configuration port (e.g., USB or TTL serial).
    

18. Q: What is the purpose of the programmer tool?
    A: The programmer tool (parameter configuration tool board) is an extra small LCD screen with menu board used for easy parameter configuration, monitoring status, and setting AT commands profiles.
    

19. Q: Can I control the transmitter remotely via data?
    A: No, basic control functions (frequency, bandwidth, password, gain ect) be connected directly via the CFG configuration port or using predefined AT commands sent from the computer serial port tool.
    

20. Q: What voltage does the TTL data port use?
    A: The TTL data port operates at standard 3.3V TTL logic levels. Ensure any connected device is compatible.
    

21. Q: Does the receiver have a data output port?
    A: Typically, the TTL data port is on the transmitter and receiver for one-way data transparent transmission. The data input from the data port on the transmitter will be completely output to the data output port of the receiver.

22. Q: What is the video resolution supported?
    A: While dependent on the specific model, systems like this often support up to 1080p30 for SDI input and HDMI output. CVBS input/output is standard definition (SD).
    

23. Q: Is it suitable for drone (UAV) use?
    A: Yes, the 1.4G frequency, COFDM robustness, low latency, and long-range transmission capabilities make it a popular choice for professional drone video downlink systems, especially with the TTL data port for telemetry.
    

24. Q: How is audio handled?
    A: Audio is typically embedded within the SDI input or carried alongside the CVBS/AV video input (usually as part of the composite signal). It will be decoded and output via the receiver’s HDMI output and potentially the CVBS output.
    

25. Q: What power supply does the transmitter need?
    A: Transmitters with 10W/20W PA typically require a robust DC input, often in the range of 24V, capable of supplying several amps (especially at 20W RF output).

26. Q: What power supply does the receiver need?
    A: Receivers usually require a standard DC input, often 12V, with lower current requirements than the transmitter.
    

27. Q: Does it work in urban environments?
    A: Yes, COFDM modulation is excellent at handling multipath interference common in urban environments, making this wireless video system suitable for city use.
    

28. Q: Is it weather resistant?
    A: Professional units often feature rugged, weather-resistant casings. Check the specific IP rating for details on suitability for outdoor or harsh environments.
    

29. Q: Can I use multiple transmitters with one receiver?
    A: This requires a receiver capable of scanning or multiple receivers. Typically, each TX-RX pair operates on a unique frequency. When multiple transmitters use similar frequencies, there will be interference, and a bandpass filter is required. When multiple transmitters use a larger frequency range, the receiver’s antenna range increases, and the sensitivity decreases, which may result in a shorter transmission distance.
    

30. Q: Can I use multiple receivers with one transmitter?
    A: Yes, a single wireless video transmitter signal can typically be received by multiple COFDM receivers tuned to the same frequency.
    

31. Q: What is the typical latency?
    A: COFDM wireless video systems like this are designed for low latency, often in the range of 100-250 milliseconds, depending on configuration, signal processing, camera and monitor.
    

32. Q: Does it support HD video over SDI?
    A: Yes, the SDI video input typically supports standard HD-SDI formats (like 720p, 1080i, 1080p).
    

33. Q: Can I send telemetry data?
    A: Yes, the TTL data port on the transmitter is specifically designed for sending TTL data transmission like telemetry (e.g., GPS, altitude, battery status) alongside the video stream.
    

34. Q: How do I connect the TTL data port?
    A: The TTL data port usually has pins for Ground (GND), Transmit (TX), and Receive (RX). Connect it to a compatible serial port (UART) on your controller/sensor using a 3.3V TTL level compatible interface.
    

35. Q: What baud rate does the TTL port use?
    A: The baud rate for the TTL data port (e.g., 9600, 19200, 57600, 115200) is usually configurable via the parameter configuration tool or AT commands.
    

36. Q: Are AT commands well documented?
    A: Professional systems should provide comprehensive documentation for the AT commands, detailing syntax, parameters, and functionality for configuration and control. serial port UART AT command
    

37. Q: Can I integrate this with my existing control system?
    A: Yes, integration is possible via the TTL data port (using AT commands or custom data) and potentially relay/GPIO signals (if available), facilitated by the parameter configuration tool.
    

38. Q: Is there encryption for the video signal?
    A: Many professional COFDM systems offer AES-128 encryption. Check the specifications or parameter configuration tool options for security settings.
    

39. Q: How do I set the encryption key?
    A: Encryption keys are typically set using the parameter configuration tool or via specific AT commands, ensuring both TX and RX share the same key.
    

40. Q: What is the bandwidth of the RF channel?
    A: COFDM systems often use configurable bandwidths like 2MHz, 4MHz, or 8MHz. This affects data rate and robustness. Set it via the parameter configuration tool.
    

41. Q: Can it transmit through obstacles?
    A: Thanks to COFDM modulation, it performs significantly better than analog or simpler digital systems in Non-Line-Of-Sight (NLOS) conditions and when penetrating light obstacles (foliage, walls), supporting long-range transmission.
    

42. Q: What’s the difference between the programmer tool and AT commands?
    A: The programmer tool is an extra LCD screen + menu board for easy setup and monitoring. AT commands offer a text-based interface for configuration and control via the TTL data port, suitable for automation and integration.

43. Q: Does the receiver output a clean HDMI signal?
    A: Yes, the COFDM receiver is designed to provide a stable, low latency HDMI output signal compatible with standard monitors and recorders.
    

44. Q: Is the CVBS output active simultaneously with HDMI?
    A: Typically, yes. Both HDMI output and CVBS output are usually active concurrently on the receiver.
    

45. Q: How do I mount the antennas?
    A: Use high-quality coaxial cables (e.g., LMR-400 for longer runs) and mount antennas (transmitter & receiver) as high and clear as possible. Directional antennas on the RX should be pointed towards the TX.
    

46. Q: What is the typical power consumption at 10W vs 20W?
    A: Power consumption is significantly higher at 20W RF output compared to 10W. Expect the 20W PA to draw 50-100% more DC power than the 10W setting. Check the datasheet.
    

47. Q: Does it have overheat protection?
    A: Professional transmitters with high-power PA power amplifiers usually include thermal protection, potentially reducing power or shutting down if overheating occurs.
    

48. Q: Can I remotely reboot the transmitter?
    A: This depends on the specific implementation. Some systems support a remote reboot command via the TTL data port using AT commands.
    

49. Q: Where can I buy this wireless video system?
    A: Search for distributors or manufacturers specializing in long-range COFDM wireless video transmitters, 1.4G frequency systems, and SDI/HDMI video links. Look for models matching the 10W/20W PA, TTL data port, and parameter configuration features. Or click contact us to get the further support.
    

50. Q: Is technical support available?
    A: As a reputable manufacturer, we offer technical support for configuring the parameter configuration tool, understanding AT commands, setting up the TTL data port, and troubleshooting COFDM transmission issues.

Q: I need a long-range, low-latency system for NLOS operation in dense forest terrain. Do you have a test video?
A: Because different obstacles, terrain structures, and forest densities cause very different transmission results, it is not possible to create a test video that accurately simulates every customer’s real usage environment.

To recommend a suitable solution, we need to understand your exact application scenario:

• Are the transmitter and receiver fixed in place (e.g., forest-fire monitoring, wildlife surveillance), or are both mobile?

• Are they located inside the forest, or can the antennas be placed above the canopy?

• How high can the antennas be mounted?

• How much NLOS obstruction (trees, hills, buildings) will the signal encounter?

In dense forest or enclosed environments, wireless signals cannot diffract effectively, and the usable transmission distance becomes very short. For NLOS and long-range applications, customers typically choose 10W–20W RF power, not 0.5W–1W, because higher power significantly improves penetration and link stability.

Once we understand your real deployment environment, we can provide a suitable model recommendation and expected performance.

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