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AFE44x0SPO2EVM FAQs

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10.3 Check TXP and TXM Waveforms

TXP and TXM waveforms are observed at TX_P (TP23) and TX_N (TP17). Figure 46 shows TXP and

TXM waveforms without connecting the pulse oximeter cable. Figure 47 shows TXP and TXM waveforms

after connecting the pulse oximeter cable.

Figure 46. TXP and TXM Without Pulse Oximeter Cable

Figure 47. TXP and TXM After Connecting the Pulse Oximeter Cable

AFE4400 and AFE4490 Development Guide SLAU480C–January 2013–Revised May 2014

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