Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

EMI Suppression Filters (EMC and Noise Suppression)Examples of measures to suppress noise in USB 3.0 CISPR25 Class 5 signal lines

Details of noise suppression measures taken in USB 3.0 mode

In the USB 3.0 SuperSpeed mode, separate signal lines are used for TX and RX, unlike in the 2.0 mode.

Here, a common mode choke coil is inserted into the TX signal line.

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles 

Common mode choke coil in TX signal line
DLM11SN900HZ2
or
DLW21SZ900HQ2
inserted

Click here Open in New Window for details of the measurement conditions.

Noise measurement results (for measures to suppress noise in USB 3.0 signal lines)

DLM11SN900HZ2 used

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles
  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehiclesBy adding a common mode choke coil (DLM11SN900HZ2), the noise was successfully reduced.

DLW21SZ900HQ2 used

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles
  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehiclesBy adding a common mode choke coil (DLW21SZ900HQ2), the noise was successfully reduced.

Verification of SI compatibility when filters are inserted

USB3.0 Non-Transition Eye Diagram

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    short

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    DLM11SN900HZ2

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    DLW21SZ900HQ2

USB3.0 Transition Eye Diagram

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    short

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    DLM11SN900HZ2

  • Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

    DLW21SZ900HQ2

<Measures to suppress noise in signal lines>