Hi,
Please give me some advice to set the DTGC positive step to 0.125dB.
<Problem Situation>
・ADC clock is 50MHz.
・I set POS_STEP_0 (Bit[15:8] in Register 162) to 00h to reduce DTGC noise.
・However, the DTGC gain does not step up and the ultrasound image remains black.
・When POS_STEP_0 (Bit[15:8] of Register 162) is set to 01h, the DTGC gain steps up normally and the ultrasound image becomes brighter.
<Register setting>
・Register 161: 009Fh (START_GAIN_0: 00h, STP_GAIN_0: 9Fh)
・Register 162: 00FFh (POS_STEP_0: 00h, NEG_STEP_0: FFh)
・Register 163: 009Fh (START_INDEX_0: 00h, STOP_INDEX_0: 9Fh)
・Register 164: 0064h (START_GAIN_TIME_0: 0064h)
・Register 165: 009Fh (STOP_GAIN_TIME_0: 0BB8h)
・Register 185: 0000h
・Register 186: 0000h
・Register 186: 0202h
・Register 186: 0202h
・Register 186: 0202h
・Register 186: 0202h
・・・・・・・・
Best Regards,
Hiromasa Yamashita