故障分析与缓解

我们的工程师是解决与杂散发射、总辐射功率、总各向同性灵敏度和天线性能有关的认证故障方面的专家。

Your device didn't pass certification testing. Now what?

Digi Wireless Design Services can perform comprehensive design analysis and lab testing to mitigate RF and EMI/EMC issues. We analyze and solve on both regulatory and performance issues, such as:

  • The device is failing cellular PTCRB certification or certification by the network operator (AT&T, Verizon, Sprint).
  • The device fails FCC Part 15 certifications, rules, and regulations regarding unlicensed transmissions.
  • The device’s wireless range is less than expected.
  • Radio performance suffers when used in the presence of another radio, such as when Zigbee communication drops during Wi-Fi file downloads.
  • Cellular total isotropic sensitivity (TIS) degrades when a touchscreen display is enabled.
  • A product with GPS fails to consistently get a lock/fix.
  • The device fails radiated spurious emissions (RSE) for FCC, CISPR, ETSI, or PTCRB due to clock harmonics or power supply noise.

To address these issues, Digi WDS offers a range of services:

  • Issue Reproduction: RF performance measurements in an anechoic chamber.
  • Schematic and Layout Review: RF best practices focused on noise filtering, processor configuration, clocks, bus connections, power supply, PCB construction, and routing.
  • Antenna Review: type, tuning, and integration into mechanical assembly.
  • Receiver Sensitivity Optimization: Optimization of total isotropic sensitivity (TIS) through proper antenna implementation and reduction of EMI from device electronics.
  • Transmit Power Optimization: Measurement and improvement of total radiated power (TRP) related to RF PCB design and antenna implementation.
  • Noise Analysis: In-situ spectral analysis to identify EMI/EMC sources.
  • Recommended Design Changes: Implementation and testing of design changes to correct observed problems.
 

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