User's Manual

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PCS3 Hardware Interface Description
6.7 Electrical Characteristics of the Voiceband Part
PCS3_HD_v01.000
Confidential / Preliminary
Page 77 of 101 2013-10-21
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6.7.4 Voiceband Receive Path
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Test conditions:
• The values specified below were tested to 1024Hz using AT^SNFO=57,33,0 in audio mode
6 during a voice call unless otherwise stated.
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Table 26: Voiceband receive path
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Parameter Min Typ Max Unit Test condition / remark
Maximum differential output voltage
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4.5
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V
32 ,
(peak
t
o peak) 5.0 V No load,
EPP to EPN @ 3.14dBm0 (Full Scale)
Nominal differential output voltage
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3.1
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V
32 ,
(peak
t
o peak) 3.4 V No load,
EPP to EPN @ 0dBm0 (Nominal level)
Output bias voltage
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1.5
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V From EPP or EPN to GND
Differential output load resistance 16
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6.7.5 Voiceband Transmit Path
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Test conditions:
• The values specified below were tested to 1024Hz using AT^SNFI=0,16,16384 in audio
mode 6 during a voice call unless otherwise stated.
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Table 27: Voiceband transmit path
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Parameter Min Typ Max Unit Test condition / Remark
Full scale input voltage (peak to
peak) for 3.14dBm0
MICP to MICN
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2.57
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V Balanced
Nominal input voltage (rms) for
0dBm0
MICP to MICN
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0.64
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V Balanced
Input amplifier 1 gain (micAmp1) 0
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24 dB Set with AT^SNFI
Fine scaling by DSP (micTxVol) -84
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12 dB Set with AT^SNFI
Microphone supply voltage VMIC
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1.8
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V No load
Microphone supply voltage VMIC 1.8
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V @ 3mA