There is no traffic in PCM interface without a call or audio play voice recorder video player etc These signals can be measured with a call which generates

Technical Documentation

8. Troubleshooting traffic in both directions. Audio play generates traffic in one direction only. Recording audio (voice recorder) generates traffic in the other direction.

1037 Acqs

1037 Acqs

I

1.

C1 +Width 1.000jjs

C1 Freq 520.08kHz

C1 +Width 1.000jjs

13:25:26

Figure 47. PCMDClk signal at J309

Figure 47. PCMDClk signal at J309

Figure 48. PCMSClk signal at J306.

8. Troubleshooting

Technical Documentation

Figure 49. PCMRxData signal at J308.
Figure 50. PCMTxData signal at J307

PCMTxData signal at J307 (Figure 50). This signal comes from the other end's microphone or audio playing software (voice recorder, video player etc) and is targeted for the earpiece or hands free speaker. There should be activity during a call. Signal rise and fall times are around 4-7ns. Idle state is low.

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