User's Manual

6.7 Elec
t
rical Charac
t
eristics of
t
he Voiceband Par
t

PCS3_HD_v01.000
Confidential / Preliminary
Page 76 of 101 2013-10-21
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PCS3 Hardware Interface Description
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Table 25: Voiceband characteristics
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Audio mode no.
AT^SNFS=
1
1
2 3 4 5 6
MIC input signal for
0dBm0,
2
f = 1024 Hz
15mV 650mV 15mV 12mV 5mV 420mV
EP output signal in mV
rms. @ 0dBm0,
1024 Hz, no load (default
gain) /
@ 3.14 dBm0
465mV 2.1Vpp 512mV 2.1Vpp 465mV 2.1Vpp 370mV 1.6Vpp 1485mV 5.7Vpp 1290mV 5.5Vpp
Sidetone gain at default
settings
-16.5dB
0dB -16.5dB -24dB 0dB 0dB
Digital audio characteristics (PCM)
Uplink gain at 1024Hz
14602(-1dBm) 16384(0dBm) 14602(-1dBm) 16384(0dBm) 16384(0dBm) 16384(0dBm)
Downlink gain at 1024Hz
25 33 25 32 32 33
Sidetone gain
5514(-21.5dBm) 0 5514(-21.5dBm) 12288(-15dBm) 0 0
1.
Fixed audio mode. Values cannot be adapted.
2.
All values measured before the noise reduction attenuates the sine wave after a few seconds.
n.a. = not applicable
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Note: With regard to acoustic shock, the cellular application must be designed to avoid sending false AT commands that might increase amplification,
e.g. for a highly sensitive earpiece. A protection circuit should be implemented in the cellular application.