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TENMA waveform file format

jstorrs

I've just got a Tenma 72-8710A72-8710A digital storage oscilloscope. I can save and view screen bitmaps to USB memory, but they are not suitable for publication. I can save Tenma .dat files, but I don't know what the format is and can't currently view them on the Linux systems I use. There is no information about the format in the Tenma documentation. Can anyone help?

  • 0

    Documentation is always fairly scant about these things - but for cheaper units it's likely either a sequence of 8-bit values or 16-bit values depending on the resolution of the scope, interleaved readings from channel to channel, of the whole waveform memory that the scope has, sometimes with a header tacked on.

     

    Have you tried interpreting the file as raw 8-bit ADC values? Perhaps you could .zip up one of the files along with its corresponding screenshot (so we know what it should look like) and post them here so someone could analyze them?

     

    - Goough

  • 0 in reply to Gough Lui

    Thanks Gough. The scope adc is 8bit, and the file data looks like raw 8bit adc values as you suggest. The header starts with 2 floats (time/div and volts/div), followed by what must be raw data calibration factors which I don't yet understand. When I do I'll report back and close my question.

     

    John