Hello,
I am working on Non-invasive, non intrusive type ultrasonic flow meter application and using V mount method for water flow detection. I am using TDC7200-1000 EVM and 1MHz transducers.
I added amplifier circuit in between TDC1000-7200 and transducer and amplify EVM 3.3V,1MHz signal to 10V and measuring echo/receiver transducer signal.
The issue is: When I measure it with TDC7200-1000 PGA gain of 21dB, I received STOP pulse at initial small echo pulses but for other followed echo signal couldn't see STOP pulse so What to do to detect STOP pulse even at other echo received signal. Image is attached below.
Yellow waveform - START Pulse,
Green waveform - PGAOUT signal
Blue waveform - STOP Pulse
Purple waveform - RX Transducer signal/echo signal
