Siemens MC35 Specifications download pdf (Page 38)

MC35i Terminal Hardware Interface Description

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MC35i_T_HD_v02.00a Page 38 of 42 16.02.2007

The electrical characteristics of the voiceband part depend on the current audio mode

selected by the AT command AT^SNFS. See

Table 12: Audio modes.

The audio modes 4 and 5 can be adjusted by parameters. Each audio mode is assigned a

separate parameter set.

Table 24: Audio parameters adjustable by AT commands

Parameter Influence to Range Gain range Calculation

inBbcGain MICP/MICN analogue amplifier

gain of baseband controller before

ADC

0...7 0...42dB 6dB steps

inCalibrate digital attenuation of input signal

after ADC

0...32767 -...0dB 20 * log

(inCalibrate/

32768)

outBbcGain EPP/EPN analogue output gain of

baseband controller after DAC

0...3 0...-18dB 6dB steps

outCalibrate[n]

n = 0...4

digital attenuation of output signal

after speech decoder, before

summation of sidetone and DAC

present for each volume step[n]

0...32767 -...+6dB 20 * log (2 *

outCalibrate[n]/

32768)

sideTone digital attenuation of sidetone

is corrected internally by

outBbcGain to obtain a constant

sidetone independently to output

volume

0...32767 -...0dB 20 * log

(sideTone/

32768)

Note: The parameters inCalibrate, outCalibrate and sideTone accept also values from 32768

to 65535. These values are internally truncated to 32767.

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Siemens MC35 Specifications Page 38