Nokia RM-529 Service Manual page 83

RM-529; RM-530; RM-584
BB Troubleshooting and Manual Tuning Guide
Figure 12 AV mic to HP ear, single-ended loop measurement. 62.5 kHz lowpass filter is used to attenuate noise from the
signal. The filter is optional.
Figure 13 Ext microphone in Int handsfree out, single-ended loop measurement without filter.
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