User Guide

Measurement data

Figure 55 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected.

If a special low-pass filter designed for measuring digital amplifiers is unavailable, the measurement must be performed with a

current probe and the input signal frequency must be 2kHz.

Figure 56 Differential output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected.

RM-49

Nokia Customer Care BB Troubleshooting and Manual Tuning Guide

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