AWR1642BOOST: Confusing of txPhaseShifter value in the CLI_MMWaveProfileCfg API

Hello everyone

In the CLI_MMWaveProfileCfg function, we can assign the phase shifting value for each Tx channel, such as profileCfg.txPhaseShifter = atoi (argv[7]);

When I open the definition of "txPhaseshifter", it shows as

    rlUInt32_t txPhaseShifter;               /*!< Concatenated phase shift for TX0/1/2,\n
                                             b7:0 TX0 phase shift value\n
                                             b15:8 TX1 phase shift value\n
                                             b23:16 TX2 phase shift value\n
                                             1 LSB = 360/2^8 = 1.4 degrees\n

From my understanding, the phase shifter only provide the 0 or 180 degree phase shift. However, from this definition, it looks like I can program the phase shifting value at step of 1.4 degrees. Can you elaborate how to use the "txPhaseshifter" value?

Another question, the only place that describe the BPM in the AWR16XX/14XX techinical reference manual is from Section 14 Hardware Accelerator. Since AWR1642 does not have the hardware accelerator, where I can find information about the register for the BPM (both for transmission and receiving)? 

Last question, 

Thanks

Xining