This application note explains loopback function of AFE79xx TI transceiver. This application note highlights the features and performance of AFE79xx as indigenous single chip repeater function for achieving low latency signal loopback using normal RX, TX pair and fast signal loopback using RX feedback and TX pair.
The application note includes the following key points.
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In mobile communication, multiband RF repeaters are deployed to extend the coverage of base station to the region uncovered by base station. This repeater needs to function indigenously without sacrificing signal quality and re-transmit at lowest group delay.
AFE79xx in-device loopback feature function is highlighted in this application note to demonstrate as a use case for repeater function. Its inherent single chip operation without requiring external FPGA or JESD link establishment achieves high instantaneous bandwidth and lowest latency meeting specification for RF repeater products.