Voiceband Transmit Path; Table 33: Voiceband Transmit Path - Siemens AC75 Hardware Interface Description

AC75 Hardware Interface Description
Strictly confidential / Preliminary
Parameter
14
Frequency Response
0Hz - 100Hz
200Hz
300Hz - 3350Hz
3400Hz
4000Hz
≥4400Hz
gs = gain setting

5.7.5 Voiceband Transmit Path

Test conditions:
•
The values specified below were tested to 1kHz and default settings of audio modes,
unless otherwise stated.
•
Parameter setup: Audio mode=5 for MICP1 to MICN1 and 6 for MICP2 to MICN2,
inBbcGain=0, inCalibrate=32767, outBbcGain=0, OutCalibrate=16384, sideTone=0

Table 33: Voiceband transmit path

Parameter
Full scale input voltage (peak to peak)
for 3.14dBm0
MICP1 to MICN1 or AGND, MICP2 to
MICN2 or AGND
Nominal input voltage (peak to peak)
for 0dBm0
MICP1 to MICN1 or AGND, MICP2 to
MICN2 or AGND
Input amplifier gain in 6dB steps
(inBbcGain)
Fine scaling by DSP (inCalibrate)
Microphone supply voltage VMIC
VMIC current
Idle channel noise
Signal to noise and distortion
14
Frequency response
0Hz - 100Hz
200Hz
300Hz - 3350Hz
3400Hz
4000Hz
≥4400Hz
14
This is the frequency response from a highpass and lowpass filter combination in the DAC of the baseband chip
set. If the PCM interface is used, this filter is not involved in the audio path. Audio mode 1 to 4 incorporate
additional frequency response correction filters in the digital signal processing unit and are adjusted to their
dedicated audio devices (see Table 31).
AC75_HD_V00.202
Min Typ Max
-34
-1.1
-0.2 0.1
-0.7
-39
-75
Min Typ
1.6
1.1
0
-∞
2.4 2.5
-83
70 77
-1.1
-0.2
-0.7
-39
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Unit Test condition / remark
dB
Max Unit Test condition / Remark
V MICPx must be biased with
1.25V (VMIC/2)
V MICPx must be biased with
1.25V (VMIC/2)
42 dB Set with AT^SNFI
0 dB Set with AT^SNFI
2.6 V
2 mA
-76 dBm0p
dB
-34 dB
0.1
-75
s
27.04.2006