Hello! I received the TDC1000-THDC7200EVM test board just recently, and I have not been able to get it to work as intended. Furthermore, I'm using an oscilloscope to inspect the problems.
I followed the datasheet/user guide and attempted to use the provided piezo (SMD15T21R111WL), for a simple test application in air (short distance measurements). Simply, to retrieve back signals. Sadly, I was unable to receive any sensible data on the GUI (graph) or on the oscilloscope.
The setup: Piezo aimed towards the surface.
The result was as following (Orange signal = START, Purple single = COMP_IN, Blue signal = STOP)
Problem:
No matter how far the piezo's distance is towards the surface, or the angle towards the surface it would still give me the same result, no changes occur. The signal only changed when any object touched the piezo.
What I have tried:
1. Loaded default configuration for the piezo
2. Tried it with two piezos, same type: SMD15T21R111WL, one is set as RX and the other TX. Same problem, the signal does not change if I move the transducers away from each other.
3. Changed configurations and tried it with a liquid application, but same result.. Signal stays the same as before, does not change.
My current setup configuration:
I'd appreciate any help!
Kind regards,
Hamza Mubasier.