A CHREDSUN ensures long-term product reliability through:
 
• Rigorous quality control processes during manufacturing
• Extensive product testing under various conditions
• Use of high-quality, durable materials
• Implementing redundancy in critical components
• Regular firmware updates to optimize performance
• Offering comprehensive warranty and service plans
• Collecting and analyzing user feedback for continuous improvement
• Conducting long-term durability tests beyond standard industry practices

A CHREDSUN offers a wide range of renewable energy products, including:

• Solar camping gear (solar tents, solar tables, solar backpacks, solar camping lights, camp fans, solar panel power banks)
• Emergency power batteries just by adding water to get electricity in a few seconds and water-activated generators
• Portable power supplies and solar panels
• Home power solutions and lithium iron phosphate batteries
• Outdoor solar lighting (street lights, landscape lighting, road lights)
• Customized small solar panels for various applications

A CHREDSUN products are designed to perform optimally under various climate conditions:
 
• In hot climates: Products feature heat dissipation technology and high-temperature resistant materials
• In cold climates: Battery systems are designed to operate efficiently at low temperatures
• In humid environments: Products have moisture-resistant coatings and sealed components
• In dry, dusty areas: Dust-proof designs and filters protect internal components
• In coastal regions: Corrosion-resistant materials are used to withstand salty air
• At high altitudes: Products are tested to perform well in low air pressure conditions
• Our extensive testing ensures reliable performance across diverse environmental conditions. 

A CHREDSUN provides customized solutions for large-scale projects by:
 
• Conducting thorough site assessments and energy requirement analyses
• Designing bespoke systems tailored to specific project needs
• Offering scalable solutions that can grow with the project
• Providing project management support throughout implementation
• Offering training for on-site personnel
• Developing custom software interfaces if required
• Providing ongoing maintenance and support services
• Collaborating with local partners for efficient project execution

A Yes, many CHREDSUN products support smart home integration:
 
• Our home energy storage systems can be integrated with smart home ecosystems
• Solar inverters can be monitored and controlled via smartphone apps
• Smart outdoor lighting can be programmed and controlled remotely
• Some portable power stations offer Wi-Fi or Bluetooth connectivity for monitoring and control
• We provide APIs for third-party smart home system integration
• Regular software updates ensure compatibility with evolving smart home standards

A

1. Q: What is the main function of this antenna?  
     A: In complex electromagnetic environments, it ensures stable satellite signal reception, performs amplification, filtering, and anti-jamming processing, and can output positioning data or send processed RF signals to an upper-level device, i.e., anti-jamming equipment. 

2.Q: Which satellite systems and frequency bands are supported?
    A: Primarily supports GPS (L1), BeiDou (B1), and Galileo (E1); can be expanded to GLONASS (G1), GPS (L2/L5), etc. if required; supports customization.

3. Q: What antenna element counts/versions are available? What are the size and weight?
     A: Common versions include 4, 8, and 16 elements (including dual-system versions). Size and weight vary by model. 50mm and 65mm are common 4-element sizes;  Other sizes please refer to the specification document.

4. Q: What are the sizes of the 4-element version?
    A: Usually there are two standard sizes for 4-element versions: 50mm and 65mm; Larger or smaller sizes can be customized as needed.

5. Q: What is the weight of the 65mm and 100mm models?
     A: 65mm model weight: <200g; 100mm model: <400g (with standard housing, excluding extra cables).

6. Q: How many jamming sources can be suppressed simultaneously?
     A: The number of directions that can be suppressed is usually the number of elements minus one; For example, a 4-element can suppress 3 directions, a 16-element can suppress 15 directions. 

7. Q: What are the specific anti-jamming levels? (Example)
     A: Example for the 100mm dual 4-element: single-direction suppression ≥110dB; three-direction suppression ≥95dB.
          For other models, see specific model specification sheets.

8. Q: What is the antenna power consumption?
     A: Power varies with the number of elements and the working mode. Example: 65mm 4-element typically ≤6W; higher element models proportionally higher.

9. Q: What is the power supply voltage range?
     A: Typically supports 9V-36VDC.

10. Q: What output interfaces are supported?
       A: Common: SMA RF interfaces; other RF interfaces can be customized. Serial/configuration ports is J30J,available for control and data output.

11. Q: What serial outputs are typically supported?
       A: 

12. Q: What are the impedance and VSWR specs for the RF interface?
       A: 

13. Q: Approximate RF output level?
       A: RF output is the level after anti-jamming processing; typical range about -55 to -70dBm.

14. Q: How is damage resistance?
       A: The antenna receiving end has burn-out protection; withstands ≥10W high power.

15. Q: Operating and storage temperature range?
       A: The operating temperature is related to power consumption, 4-element typically -40°C to +70°C; The storage temperature is generally -45°C to +85°C.

16. Q: What is the waterproof/protection rating?
       A: Default is IP65; IP67/IP68 available if needed.

17. Q: Installation methods and mounting holes?
       A: Common options: bottom standard mounting holes (e.g., M2.5) and side mounting. See product drawing for details.

18. Q: Does it include a built-in receiver? Can it directly output position (PVT)?
       A: Optional, not configured by default, Optional model: uBlox NEO-M9N,UM960. Built-in receiver and can directly output position / velocity (PVT) results.

19. Q: What is the typical positioning accuracy?
       A: With good signal view, horizontal accuracy usually ≤7~10m (95%); actual performance depends on environment.

20. Q: How to switch between bypass and anti-jamming modes? Will this affect service?
       A: Switching via serial command or configuration tool; transitions are smooth and won’t cause long disruptions, making diagnostics easy.

21. Q: What types of jamming signals can be suppressed?
       A: Supports suppression and mitigation of narrowband, wideband, sweep, pulse, and combination jamming.

22. Q: Is anti-spoofing supported?
       A: Yes, some models have anti-spoofing capability, improving security in complex electromagnetic environments.

23. Q: What factory tests are performed? Can test reports be provided?
       A: Factory tests include visual inspection, dimensional check, electrical, functional, and anti-jamming performance tests. Reports and acceptance records available upon request.

24. Q: What about warranty and after-sales service?
       A: Generally, 12-month warranty, including remote technical support and, if needed, return for repair or replacement. Details specified in contract.

25. Q: Is customization supported? What can be customized?
       A: Supports customization of shape, interface, frequency bands, waterproof rating, software features, etc.
           MOQ, lead time and specifics depend on customer requirements.

26. Q: Lead time and stock availability?
       A: Some standard models are in stock; customized / bulk per contract. Contact us for exact inventory and schedule.

27. Q: How to choose between different element counts?
       A: If compactness, low weight, and low power with simple EMI is needed, choose 4-element; for multiple-direction jamming in complex environments, 8 or 16-element is recommended.

28. Q: Does it support simultaneous multi-band processing?
       A: Yes, all models support simultaneous BDS_B1, GPS_L1, Galileo E1; Some support BDS_B1, GPS_L1, Galileo E1, and GLONASS G1 together; Certain models support BDS_B1, GPS_L1, Galileo E1+GPS_L2 or GPS_L5 at the same time.

29. Q: Does it support high-precision applications?
       A: Yes, some models are designed with anti-jamming for high-precision use cases (currently, no high-precision models available).
 
30. Q: Which flight controller firmware and navigation protocols are supported by your anti-jamming antenna?
       A: Our anti-jamming antenna is compatible with mainstream UAV flight controller firmware and protocols, including ArduPilot and Betaflight. 
31. Q: I checked the datasheets you shared with me, could you please also give information about the software side? Is there any AI or machine learning integrated?  
       A: There is no software, AI, or artificial intelligence inside it. It is simply an all‑in‑one anti‑jamming unit, which can also be used as an anti‑jamming antenna.
 
32. Q: What types of chips are used in your anti‑jamming antennas? Does it matter whether the chips are domestic or foreign?
       A: Our anti‑jamming antennas integrate a mix of chips from both domestic and international suppliers, with foreign chips currently accounting for the majority. In our view, the key factor is whether each chip passes our performance and reliability verification, not whether it is made domestically or overseas. As long as the device meets our design, testing and quality‑control standards, the origin of the chip has no essen.
 
33. Q: What kind of memory is used? What type of FPGA?
       A: This is our technical secret, so we are unable to disclose it.
 
34. Q: How many of them you have in stock?
       A: Only the single-band 4‑element and single-band 16‑element models are in stock, with quantities ranging from 5 to 100 sets.
 
35. Q: Is your 16‑element anti‑jamming antenna already in service and used in real field operations?
       A: Our 16‑element anti‑jamming antenna is mainly for export and has not yet been put into use in the domestic market.
 
36. Q: What is the origin of the device?
       A: These are customized products for overseas clients and are already deployed in the field, where they have been tested and validated in real operation.
 
37. Q: What types of dual-band CRPA antennas do you offer?
       A: We have dual-band antennas available in two types: L1+L2 or L1+L5 for option. May I ask which one you need, or do you require both?
38. Q: Spoofing issue: As I understand, does your signal processing method not allow you to recognize spoofing?
       A: Our current products are equipped with basic anti‑spoofing functions, which can provide a certain level of protection against spoofing attacks, but they cannot yet guarantee the identification of all sophisticated spoofing attempts.

39. Q: Which GNSS receiver do you use with your L1+L2 / 8+8 antenna CRPA solution?
       A: UM960

40. Q: Have you comparison tests with your concurrents?
       A: Its anti-jamming capability is 10 dB better than that of competing products.

41. Q: What difference between Dual 4-element and 8-element array?
       A: Regarding the difference between a dual 4‑element array and an 8‑element array, there are three main points:
42. Q: For the 4‑element anti‑jamming GNSS antenna, should I choose the 50×50 mm or the 65×65 mm version?
       A: We can provide both 50×50 mm and 65×65 mm 4‑element anti‑jamming antennas. The 50×50 mm version is designed mainly for small UAVs and other platforms with very limited installation space.