Dear support team,
I have 2 questions about Tx phase shifter setting index.
1. I could not find about the exact phase shift index for the phase value.
I think it will be like... index 0 -> 0deg, index 1 -> 5.625deg, index 2 -> 11.25deg, ..., index 63 -> 354.375deg.
However, at the 'Table A-3' in the document named "spracv2.pdf" (Cascade coherency and phase shifter calibration), phase shift index of Tx2 and Tx3 do not follow above order.
| Table A-3. Factory Measured Phase Shift Array at 25C for AWR2243 | |||
| Phase shift index | Factory measured phase shift array | ||
| TX1 | TX2 and TX3 | 76-77 GHz band | 77-81 GHz band |
| 0 | 32 | 0.00 | 0.00 |
| 1 | 33 | 8.97 | 8.98 |
| 2 | 34 | 17.88 | 17.77 |
| ~ | ~ | ~ | ~ |
| 63 | 31 | 351.40 | 351.02 |
Could you explain the exact index for the phase value?
2. When setting phase shifter with the index, it seems that the index shout be multiplied by 4.
for example, index 0 -> 0deg, index 1x4 -> 5.625deg, index 2x4 -> 11.25deg ...
Please confirm about this operation.
Thanks!
