Hi Team,
In the cascaded environment of 4 AWR2243, I collected the data of the monitoring report of two groups of phase shifters and found that under different monitoring chirp slope configurations, there were differences in the phases of the 12 phase shifters involving 4 chips. Why are there differences? I thought that the phase deviation of the phase shifters were derived from the manufacturing differences and the characteristics of the hardware itself. Why were the results affected by the changes of the monitoring chirp slope?
Through 'AWR_MONITOR_TX0_PHASE_SHIFTER_CONF_SB', 'AWR_MONITOR_TX1_PHASE_SHIFTER_CONF_SB', and 'AWR_MONITOR_TX2_PHASE_SHIFTER_CONF_SB', I configured the same PROFILE_INDX. The starting frequency was 79GHz, PH_SHIFTER_MON_CFG was 3. PH_SHIFTER_INC_VAL1 was 0. PH_SHIFTER_INC_VAL2 was 4. PH_SHIFTER_MON1 and PH_SHIFTER_MON2 were both 0. For the two collections of data, different MON_CHIRP_SLOPE were configured. For one group, it was 7. For the other, it was 28.
By measuring the 'PH_SHIFTER_MON_VAL1和PH_SHIFTER_MON_VAL2' of the 'AWR_MONITOR_TX0_PHASE_SHIFTER_REPORT_AE_SB', 'AWR_MONITOR_TX1_PHASE_SHIFTER_REPORT_AE_SB', and 'AWR_MONITOR_TX2_PHASE_SHIFTER_REPORT_AE_SB', I found that there was a difference between the 'PH_SHIFTER_MON_VAL1's of the same Tx of the same chip in the two collections of data, namely a deviation of 5~10°, and the calculated phase shift deviation changes under each FTTI were different either.
The expected results should be that the 'PH_SHIFTER_MON_VAL1's of the same Tx of the same chip were basically the same. The phase shift deviations should be basically the same as FTTI changes.
Kind regards,
Katherine
