User Guide

Loop test Input
terminal
Output
terminal
Path gain
[dB]
(fixed)
Input
voltage
[mVp-p]
Outout
voltage
[mVp-p]
Output DC
level [V]
Output
current
[mA]
External
Mic to
Internal
Earpiece
HS_MIC &
GND
EarP & -10 1000 310 1.2 NA
GND
EarN &
GND
External
Mic to
Internal
handsfre
e
HS_MIC &
GND
J2103 &
J2104
-6 1000
J2101 &
J2102
Digital
Mic to
External
Earpiece
Acoustica
l input,
1KHz sine
wave
HS_EAR_L
& GND
NA 94 dB SPL 100 NA
Measurement data
Earpiece signal
Figure 14 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected
Integrated handsfree signal
RM-412; RM-413
BB Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 3 –35
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