ASSR-4120-302E datasheet by Avago Technologies

ASSR-4120-302E Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the ASSR-4120-302E?
  A 4-layer PCB with a solid ground plane and a separate power plane is recommended. The device should be placed near the center of the board, and the antenna should be placed at least 10mm away from other components.
• How do I ensure reliable communication between the ASSR-4120-302E and other devices in a noisy environment?
  Implementing a robust error correction mechanism, such as CRC and retransmission, and using a spread spectrum modulation technique can help ensure reliable communication in noisy environments.
• What is the maximum transmission power of the ASSR-4120-302E, and how can I adjust it?
  The maximum transmission power of the ASSR-4120-302E is +20 dBm. The transmission power can be adjusted by modifying the PA_BIAS voltage and the TX_GAIN register settings.
• How do I implement a low-power mode for the ASSR-4120-302E to conserve battery life?
  The ASSR-4120-302E has a built-in low-power mode that can be enabled by setting the PWR_MODE register to 1. Additionally, the device can be put into sleep mode by asserting the nSHDN pin low.
• What is the recommended antenna design for optimal performance of the ASSR-4120-302E?
  A monopole or dipole antenna with a length of 1/4 wavelength (approximately 32mm at 2.4 GHz) is recommended. The antenna should be matched to 50 ohms and have a return loss of less than -10 dB.