Is it possible to configure the AD9361 to use LNA1 A and LNA2 B simutaneously?
It is not possible to configure the LNA1 A and LNA2 B inputs simutaneously. LNA inputs can only be selected in pairs. Tha LNA inputs cannot be mixed for example RX1A_N cannot be combined with RX1C_P. Valid cases are shown in the table below.
(Rx1A_N and Rx1A_P) and (Rx2A_N and Rx2A_P)
(Rx1B_N and Rx1B_P) and (Rx2B_N and Rx2B_P)
Rx1C_N and Rx1C_P) and (Rx2C_N and Rx2C_P)
The part was designed for 2x2 MIMO (diversity) meaning the two sides (1 and 2) are set up the exact same way, therefore only "matching" pairs of inputs can be enabled. MIMO, system level, improves throughput and communication performance.
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