ADRV9002 Enabling DPD in 2T2R TDD application

Hello,

I am trying to enable DPD function with custom ADRV9002 board in a single-band 2T2R TDD application. I found some wrong operations and need some helps to solve it;

1. I captured data from 4 paths (Tx_I, Tx_Q, ELB_I, ELB_Q) using adi_adrv9001_dpd_CaptureData_Read(). Tx data is tone signal. Capture parameters used (lenth=4096, autoIncrement=true). In result, one (or two) of 4 captured data is not tone signal but constant value.

2. I want to control TX1_ENABLE and TX2_ENABLE independently. When TX1_EN input pin is "ON" and TX2_EN input pin is "OFF", I expect signal output only in TX1 port. But, there are no any signal output in both of TX1 and TX2 port. If I turn on TX1_EN and TX2_EN simultaneously, there are signal outputs in both of TX1 and TX2 port.

3. I try to use DPD in 2T2R TDD application. I turn on both of TX1_ENABLE and TX2_ENABLE signals simultaneously and periodically. When duration of TX ENABLE is above 2.5ms, I can observe DPD update operations in both of TX1 and TX2. However, when duration of TX ENABLE is 1ms, I can observe DPD update operation only in TX1.

Best regards!