User Guide

NSM–5
UI section
PAMS Technical Documentation
Page 15
Issue 1 02/2002
 Nokia Corporation
Microphone
The internal microphone is placed to slide. Microphone is OMNI direction-
al. The microphone requires a bias current to operate. The bias current is
generated from VCOBBA supply with a transistor. EMC protection parts
are implemented partly in slide and partly on motherboard.
Pin Name Min Typ Max Unit Notes
X300/2 MICP 0.55 4.1 mV Connected to COBBA MIC2N input.
The maximum value corresponds to1
kHz, 0 dBmO network level with input
amplifier gain set to 32 dB. typical val-
ue is maximum value – 16 dB.
X300/1 MICN 0.55 4.1 mV Connected to COBBA MIC2P input.
The maximum value corresponds to1
kHz, 0 dBmO network level with input
amplifier gain set to 32 dB. typical val-
ue is maximum value – 16 dB.