AGC2_CTRL register
| AGC_MEAS_TIME | Measure time. |
| AGC_START_MAX_ATTEN | Start the AGC with maximum attenuation. |
| AGC_FREEZE_ON_SYNC | Enable the freeze on SYNC detection feature |
| AGC_FREEZE_ON_STEADY | Enable the autofreeze feature |
| AGC_HIGH_ATTEN_MODE | Enable the high attenuation mode. |