535Mhz long-range COFDM wireless audio transmitter and receiver 1U 2U in-car use

Feature

1. 535MHz or 595Mz, other frequencies are customized. （170Mhz~860Mhz customize support, higher working frequency need to add frequency down converter at the receiver side）
2. The transmitter or receiver metal box is customized. (1U or 2U or other type design)
3. Built-in 10W or 20W amplifier. Other power amplifiers can also be customized according to your project requirements.
4. The project setup is customized according to the customer’s requirements, with the vehicle-mounted long-range COFDM wireless audio transmitter installed on a moving car and the receiver installed on a fixed high-rise building/tower.
5. The audio input interface can directly connect a microphone.
6. One-button switching between audio only or both audio + video input.
7. The transmitter’s single transmitting antenna and the receiver’s two receiving antennas have built-in band-pass filters to shield clutter interference to or from other devices.
8. The transmitter and receiver are equipped with audio output or output interface on the front and back for user convenience.
9. V1/V2 switch button, audio only / audio + video optional source on the transmitter.

Metal box Inside

Default TX RX Setting

Full Set Accessory

Precautions for use

1. Warning: Please connect only one of 110~240V and 28V on the transmitter. Please connect only one of 110~240V and 12V on the receiver.
2. The DC power supply of the transmitter is 28V, 4A, and the receiver is powered by 12V.
3. The power switch on the front panel of the transmitter controls 110-240V AC. The DC power supply of the transmitter rear panel is connected to the car battery or battery for direct power supply. (28VDC has no power switch control)
4. The 110-240V and 28V of the transmitter cannot be powered at the same time, choose one of them.
5. A1/A2 on the front panel of the transmitter switches the front microphone input or the rear panel microphone input. Pressing the button is the microphone audio input of the front panel of the transmitter, connected to the built-in amplifier. For non-powered microphones.
6. Press A1/A2 on the front panel of the transmitter again for the microphone audio input of the rear panel of the transmitter, not connected to the built-in amplifier board. Suitable for powered microphones.
7. V1/V2 on the front panel of the transmitter switches audio or audio + video input. The transmitter CVBS has video transmission, and if you press it again, there is no video input, the video displays a white screen, and only sound is transmitted.
8. Because the microphone is mono, the microphone on the transmitter is used for right channel input by default, and the receiver audio output must also be connected to the right channel output. If your microphone is connected to the left channel, then the receiver also needs to be connected to the left channel audio output.
9. The transmitter front panel audio input and rear panel audio input cannot be used at the same time.

FAQ

1. What is a 535MHz long-range COFDM wireless audio transmitter and receiver?

A 535MHz long-range COFDM wireless audio transmitter and receiver is a professional-grade system for stable, high-quality wireless audio transmission over long distances, commonly used in vehicles or mobile setups. It has a switch for audio only or video+audio wireless transmission.

2. What is the transmission range of this COFDM wireless audio system?

This 20WPA 20 watts power amplifier COFDM wireless audio system can achieve transmission ranges up to 1km to 3km on the ground depending on environmental conditions and antenna configurations.

3. Is this 535MHz COFDM audio transmitter suitable for in-car installations?

Yes, the 1U and 2U rack-mounted designs are tailored for in-car use, providing robust wireless audio links while on the move.

4. What is the main frequency band of this wireless audio transmitter and receiver?

The primary operating frequency is 535MHz UHF band, suitable for long-distance, low-interference wireless audio transmission. Other frequency 170-860Mhz can be customized. Over 860Mhz, we have added a frequency down converter on the receiver.

5. What is COFDM technology in wireless audio transmission?

COFDM (Coded Orthogonal Frequency Division Multiplexing) ensures reliable audio transmission even in NLOS (Non-Line-of-Sight) and mobile conditions.

6.Can I use the 535MHz COFDM system for live event audio streaming?

Yes, it is ideal for live event audio, mobile production, and vehicle-based operations, ensuring stable and clear audio transmission.

7.What are the audio quality specifications of this COFDM transmitter?

It supports high-fidelity audio with low latency, suitable for professional broadcast and communication applications.

8. What is the power output of the 535MHz COFDM transmitter?

Depending on the demands of your project, it typically offers up to 5W, 10W, 20W or 50W RF output power, enhancing the transmission distance.

9. What types of antennas can I use with this transmitter and receiver?

Both omnidirectional and directional antennas can be used to optimize coverage and range. On the transmitter, we offer an 80cm fiberglass omnidirectional transmitter antenna, on the receiver, there are including two 180cm omnidirectional receiver antennas. See full set picture

10. Is the system compatible with standard professional audio equipment?

Yes, it supports standard XLR (microphone) and RCA audio interfaces, ensuring broad compatibility with audio mixers and recorders.

11. What is the latency of the 535MHz COFDM wireless audio system?

It features ultra-low latency within 100-300 milliseconds, suitable for real-time applications.

12. Can this system transmit both analog and digital audio signals?

Yes, it can transmit both analog and digital audio signals, providing flexibility in integration.

13. Does the 535MHz COFDM receiver require a special power supply?

The receiver typically operates on 12V or 110~240V DC, suitable for vehicle power systems.

14.Is the 1U or 2U form factor customizable?

Yes, customized enclosures and configurations are available to fit specific in-car or stationary setups.

15. Is encryption available for secure audio transmission?

Yes, the system can integrate AES128 encryption to protect audio data over the wireless link. You can enter your defined password via the transmitter’s parameter configuration tool.

16. How does COFDM prevent audio signal interference?

COFDM’s multi-carrier modulation and error correction minimize interference and signal dropouts in complex RF environments.

17. Can this wireless audio transmitter and receiver be used in emergency vehicles?

Absolutely, it is perfect for police cars, ambulances, and other emergency vehicles for secure audio links.

18. Is the system resistant to multipath interference?

Yes, the COFDM modulation is inherently resistant to multipath interference, maintaining audio integrity.

19. What is the weight of the 1U and 2U COFDM wireless audio units?

The weight varies, but typically the 1U receiver weighs around 3-4kg, and the 2U transmitter around 5-6kg.

20. Can the system be operated while the vehicle is moving?

Yes, it is designed for mobile use, ensuring stable audio transmission even at high speeds.

21. What kind of maintenance does the COFDM wireless audio system require?

It requires minimal maintenance, primarily keeping connections clean and ensuring firmware is up to date.

22. Does the 535MHz system support duplex communication?

No, it if simplex communication one-way transmission. Please choose other models to support duplex communication.

23. What input/output audio connectors are provided?

Usually, it provides balanced XLR, 3.5mm jacks, and RCA connectors for versatile connectivity. (customized)

24. Is this system compatible with COFDM video transmitters?

Yes, there are V1/V2 switch button. Press it once, and it is a wireless audio transmitter. Press two times. It is a wireless audio / video transmitter.

25. What are typical applications for the 535MHz COFDM wireless audio system?

Applications include vehicle-to-vehicle communication, mobile news broadcasting, emergency services, and live events.

26. Can this system operate in dense urban environments?

Yes, COFDM is well-suited for urban environments, with high resistance to reflection and signal blockage.

27. What power consumption should I expect?

Power consumption ranges from 20W to 50W, depending on transmission power and model specifications.

28. Is this product compliant with international RF standards?

Yes, it complies with FCC, CE, and other regional RF regulations.

29. What’s the typical operating temperature range?

It operates reliably between -20°C to +80°C, ideal for in-vehicle or outdoor use.

30. Can I integrate this system into an IP network?

Some models offer IP streaming capabilities via Ethernet, for hybrid analog/digital solutions.

31. Is remote configuration supported?

There are a parameter configuration tool menu and screen on the transmitter and receiver’s metal box.

32. What is the maximum number of audio channels supported?

Typically, it supports one audio channels, but customization is available for more.

33. Is it possible to customize frequency ranges?

Yes, frequency ranges can be custom-tuned within the UHF band 170-860MHz, depending on regional regulations.

34. How secure is the audio transmission over 535MHz COFDM?

With encryption and error correction, the transmission is secure against eavesdropping and signal loss.

35. How does the system handle signal dropouts?

Built-in automatic re-sync and error correction ensures minimal impact during temporary signal loss.

36. Does the COFDM audio transmitter support GPS integration?

No. It does not have any GPS function.

37. What’s the installation process in a vehicle?

Installation is straightforward: rack-mount the unit, connect power, antennas, and audio sources.

38. Can this system be used in maritime environments?

Yes, with a proper antenna and power supply, it can be used on boats or ships. A sealed enclosure that is waterproof and moisture-proof may also be considered.

39. How does 535MHz frequency help in long-distance audio transmission?

The 535MHz UHF band offers a good balance of range and penetration, suitable for long-range communication.

40. What’s the difference between 1U and 2U versions?

The 1U version is more compact, while the 2U may include more features, higher power, or dual channels.

41. Is there a battery-powered version of this wireless audio system?

Typically, these are vehicle-powered, but custom battery solutions can be designed.

42. How long is the warranty for this product?

Most units come with a 1-year warranty, with extended options available. Lifetime free maintenance.

43. Can I use this system for private radio networks?

Yes, it is suitable for private audio communication networks with configurable frequencies.

44. What is the audio signal-to-noise ratio (SNR)?

It provides an SNR of over 70dB, ensuring clear audio quality.

45. Is there a way to monitor signal strength?

Yes, the receiver feature signal strength indicators via LED or digital display. LOCKED means the signal is locked.

46. Can I upgrade the firmware of the COFDM system?

Yes, firmware updates are provided for performance enhancements and new features.

47. What’s the shipping size and packaging?

Standard packaging includes secure foam-padded boxes, with dimensions varying by model.

48. Is the product resistant to vibration and shock?

Yes, the chassis is designed to be rugged and vibration-resistant, perfect for vehicle use.

49. Can the 535MHz audio system be integrated with video monitoring systems?

Yes, it can be integrated with wireless video transmission systems for combined AV solutions.

50. Where can I buy the 535MHz COFDM wireless audio transmitter and receiver?

You can purchase directly from us, specialized RF communication equipment.