User's Manual

Table Of Contents

AHS3-W Hardware Interface Overview

3.6 Analog Audio Interface

AHS3-W_HIO_v02.540a Page 27 of 41 2012-09-05

Confidential / Preliminary

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3.6 Analog Audio Interface

AHS3-W has an analog audio interface with a balanced analog microphone input and a bal-

anced analog earpiece output. A supply voltage and an analog ground connection are provided

at dedicated pins.

AHS3-W offers six 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 be altered with AT commands (except for mode 1).

When shipped from factory, all audio parameters of AHS3-W are set to audio mode 1. This is

the default configuration optimised 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

parameters which cannot be modified. To adjust the settings of the Votronic handset simply

change to another audio mode.

3.7 Pulse Code Modulation Interface (PCM)

AHS3-W’s PCM interface can be used to connect audio devices capable of pulse code modu-

lation.