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WEBENCH® Tools/MSP430FR6047: what the meaning of term in x and y axis in ADC capture graph?

Shishir Pali
Prodigy 145 points
Part Number: MSP430FR6047


Tool/software: WEBENCH® Design Tools

y-axis means the -  amplitude of received signal train, but what's its magnitude (i.e mvolts or volts)

x - axis - ADC Buffer index ?

please help me understand this graph? 

  • 0
    TI__Genius 11850 points

    Hi Shishir,

    The ADC Capture graph shows the UPS (upstream) and DNS (downstream) ADC conversion results over time.

    On the x-axis, "ADC Buffer Index" refers to the ADC sample number. For example, an ADC buffer index of 10 corresponds to the 11th ADC sample (since the indexing starts from 0). You can think of this as how "array[0]" refers to the 1st element in an array, while "array[10]" refers to the 11th element in an array.

    On the y-axis, the amplitude shows the raw ADC conversion result. Since the ADC is 12 bits, the conversion result (amplitude) is a signed integer number that can range from -2048 to +2047. This value refers to ADC measurement "levels" rather than a standard unit such as V or mV. You may also refer to this E2E thread for a more detailed explanation: 

    https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/837435

    Best regards,

    Angelo

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