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TDC1000-C2000EVM: TDC

Nikhil Adimulam
Prodigy 10 points
Part Number: TDC1000-C2000EVM
Other Parts Discussed in Thread: TDC1000

Hi All,

We're using the TDC1000-C2000 EVK board and the TDC1000 gui tool for configuration.

Our goal is to capture transmitted pulses via an oscilloscope without utilizing a transducer.

Currently, we're only observing single spikes within the configured time duration instead of the expected square pulses.

Any advice on capturing the transmitted pulses without the transducer would be greatly appreciated.

Thank You In Advance

  • 0
    TI__Mastermind 22470 points

    Hello Nikhil,

    Thanks for posting to the sensors forum!

    You should be able to connect a probe or a wire to the J5 connector and capture the pulses through here. Make sure the connection is made to the top of the connector as all the bottom connections are grounded so you will not be able to observe anything there. Also ensure that you are emitting more than a single pulse from the TDC1000 and I would suggest setting up a trigger to capture the excitation pulses.

    I have captured output pulses without a transducer connected so this should work just fine on your end. Let me know if you are still having trouble or have any other questions!

    Best,

    Isaac

  • 0 in reply to Isaac Lara
    Prodigy 10 points

    Hello Lara,

    Thank You for your quick response

    We tried all these steps, but still could not be able to capture the Tx pulses on oscilloscope.  We always get single pulse even if we set multiple pulses in GUI. 

    Right now, we did not connect the sensor and we are capturing without sensor.

    So, is it possible to capture the Tx pulse without connecting sensor.

    Note: Our sensor works at 120V, so we can't connect the sensor directly to the eval board, in b/w have to use level shifters. We've made the other circuit board ready for switching from 5V to 120V to the sensor.  Once we get the required pulses from eval board, then we'll connect to our board along with sensor and test it out. 

    Thank You 

    Best Regards,

    Nikhil

  • +1 in reply to Nikhil Adimulam
    TI__Mastermind 22470 points

    Hello Nikhil,

    Thanks for the background info. Could it be a configuration issue with your scope?

    I just tried this at my desk by configuring the TDC1000 to emit 4 pulses and I was able to see that on the scope. The blue is the START pulse, and the orange are the TX pulses from the device. I have attached an image of the probe connections on my board.

    Best,

    Isaac

  • 0 in reply to Isaac Lara
    Prodigy 10 points

    Hello Lara,

    Thank you for the in-detail information.

    We are getting the pulses now, without sensor.

    Regards,

    Nikhil

  • 0 in reply to Nikhil Adimulam
    TI__Mastermind 22470 points

    Hello Nikhil,

    I am glad that worked thanks for the update!

    Best,

    Isaac