Audio Programming Model; Figure 41: Audio Programming Model - Siemens AC75 Hardware Interface Description

AC75 Hardware Interface Description
Strictly confidential / Preliminary

5.7.2 Audio Programming Model

The audio programming model shows how the signal path can be influenced by varying the
AT command parameters. The parameters inBbcGain and inCalibrate can be set with
AT^SNFI. All the other parameters are adjusted with AT^SNFO.
Microphone
feeding
MIC1
MIC2
RXDDAI
EP1
8Ohms
EP2
32 Ohms
TXDDAI
AC75_HD_V00.202
VMIC
<inBbcGain>
<mic>
<ep>
<outBbcGain>

Figure 41: Audio programming model

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GSM module
<inCalibrate>
A
D
<io>
D
A
<outCalibrate [n]>
AT parameters are given in brackets <...>
and marked red and italic.
s
Speech
coder
<sideTone>
Speech
decoder
27.04.2006