User's Manual

PCS3_HD_v01.000-03
Confidential / Preliminary
Page 40 of 101
2013-10-21
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PCS3 Hardware Interface Description
3.8 Analog Audio Interface
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3.8 Analog Audio Interface
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PCS3 has an analog audio interface with a balanced analog microphone input and a balanced
analog earpiece output. A supply voltage and an analog ground connection are provided at
dedicated lines.
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PCS3 offers eight audio modes which can be selected with the AT^SNFS command. The elec-
trical characteristics of the voiceband part vary with the audio mode. For example, sending and
receiving amplification, sidetone paths, noise suppression etc. depend on the selected mode
and can in parts be altered with AT commands (except for mode 1).
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Please refer to Section 6.7 for specifications of the audio interface and an overview of the audio
parameters. Detailed instructions on using AT commands are presented in [1]. Table 25 sum-
marizes the characteristics of the various audio modes and shows what parameters are sup-
ported in each mode.
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When shipped from factory, all audio parameters of PCS3 are set to audio mode 1. This is the
default configuration optimized for the Votronic HH-SI-30.3/V1.1/0 handset and used for type
approving the Cinterion Wireless Modules reference configuration. Audio mode 1 has fix pa-
rameters which cannot be modified. To adjust the settings of the Votronic handset simply
change to another audio mode.