SPRACV2 November 2020 AWR1843 , AWR2243
Representative amplitude stability across TX phase shifter codes from a nominal AWR2243 device is shown in Figure 3-7 (with and without the calibration procedures using temperature correction LUTs explained above). In TI lab evaluation of a few DoE devices, the phase shifter INL has been observed to be < approximately +/- 0.3 dB. The evaluation used a waveguide loopback between the TX and RX of an AWR2243 device and measured TX phase shifter amplitude variation by sweeping across TX phase shifter codes and processing the ADC data received on the RXs. The data shown below is measured with a single TX been ON at a time. If multiple TXs are ON at the same time the Tx-Tx antenna coupling could cause secondary impact on amplitude.