MRF89XA-I/MQ - Microchip

MRF89XA-I/MQ Frequently Asked Questions (FAQs)

• What is the recommended antenna design for optimal performance?
  The recommended antenna design for optimal performance is a quarter-wavelength monopole antenna with a length of around 17.5 cm for the 868 MHz frequency band and 8.5 cm for the 915 MHz frequency band. The antenna should be matched to the module's 50 ohm impedance.
• How do I configure the module for low power consumption?
  To configure the module for low power consumption, set the module to sleep mode when not transmitting or receiving data. The sleep current is typically around 1-2 uA. Additionally, adjust the transmission power and data rate to the minimum required for your application.
• What is the maximum transmission distance of the MRF89XA-I/MQ module?
  The maximum transmission distance of the MRF89XA-I/MQ module depends on the environment and the antenna design. In ideal conditions, the module can achieve a transmission distance of up to 10 km. However, in urban areas with obstacles, the transmission distance may be limited to around 1-2 km.
• How do I implement frequency hopping spread spectrum (FHSS) with the MRF89XA-I/MQ module?
  To implement FHSS with the MRF89XA-I/MQ module, use the module's built-in frequency synthesizer to hop between different frequencies in the 868 MHz or 915 MHz frequency band. The module can hop between up to 16 different frequencies. The hopping sequence and frequency spacing should be designed according to the specific regulatory requirements and application requirements.
• What is the maximum data rate supported by the MRF89XA-I/MQ module?
  The MRF89XA-I/MQ module supports a maximum data rate of up to 250 kbps. However, the actual data rate may be limited by the application and the environment.