AX5043 Use as Analog FM Transceiver
This application note describes how to use the AX5043 as an analog FM half−duplex transceiver. A modified AX−RadioLAB project, ax5043_analog_FM_demo, is used to demonstrate FM operation.
■The AX5043_analog_FM_demo Project
The AX5043_analog_FM_demo_v1.1 project is a modified AX−RadioLAB_v2.3g project. The SLAVE firmware demonstrates analog FM receive, whereas MASTER firmware demonstrates analog FM transmit.AX−RadioLAB and the AXRadioV2API provide a basic setup, allowing to check for the AX5043 IC, to set some general parameters (e.g. carrier frequency) and to range the PLL.
The default configuration is for 200 kHz wideband (broadcast) FM. For narrow band FM the following changes should be made: The RX bandwidth should be adjusted using AX−RadioLAB. The TX deviation should be adjustedby changing AX5043_FSKDEV0 in COMMON/fm.c according to the formula in “Transmit side/Software configuration” section.
The following tables list those input parameters of AX−RadioLAB which are relevant here and the derived AX5043 registers relevant for FM operation.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2021/8/6 |
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Rev3 |
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AND9313/D |
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146 KB |
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