CT_AGC_STEP_0
*tune_state = CT_AGC_STEP_0;
if (*tune_state == CT_AGC_STEP_0)
if (*tune_state == CT_AGC_STEP_0) {
*tune_state = CT_AGC_STEP_0;
case CT_AGC_STEP_0:
if (tune_state == CT_AGC_STEP_0)