Auxiliary Audio To Wireless Cpu (Auxi) - Wavecom GR64 GSM/GPRS Integrator's Manual

5.9.1

Auxiliary Audio to Wireless CPU (AUXI)

AUXI is a single-ended auxiliary analogue audio input to the Wireless CPU. Internally,
the signal is routed to the CODEC (Coder/DECoder), where it is converted to digital
audio and mapped to an internal bus.
Figure 15: Auxiliary input connections to the Wireless CPU
The AUXI input is a passive network applying -5dB of gain followed by the transmit
part of the CODEC.
Parameter
Input voltage full scale
Frequency response
AC input impedance
GR64 Integrators Manual
Page: 52/104
Conditions
max input gain
min input gain
-3dB cut-off
300-3400 Hz
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Min Typ Max
142 158 178
447 501 564
340 3400
100
Unit
mVrms
mVrms
Hz
kohm