Siemens AC75 - Manual (Page 467)

AC75 AT Command Set
18.11 AT^SNFI
s
AC75_ATC_V01.002 Page 467 of 569 10/30/06
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18.11 AT^SNFI Set microphone path parameters
AT^SNFI
controls the microphone path amplification. Read and write options of this command refer to the active
audio mode. The write command works only in audio modes 2 to 6.
Syntax
Parameter Description
ADC gain adjustable in eight 6 dB steps from 0 dB to 42 dB (0=0dB, 7=42dB, 8 steps of 6 dB).
0...7
Multiplication factor for input samples. Formula to calculate the negative gain (attenuation) of the input signal:
Gain in dB = 20 * log (inCalibrate / 32768)
0...32767
Notes
• The range of
<inCalibrate>
is up to 65535 but will be suppressed to 32767. Values above
<inCali-
brate>
= 65535 will cause a failure.
• The parameter
<inCalibrate>
of
AT^SNFI
is identical with
<atten>
of
AT^SNFA
.
• For use after restart, changed values can be stored with
AT^SNFW
.
• Attention! When you adjust audio parameters avoid exceeding the maximum allowed level. Bear in mind that
exposure to excessive levels of noise can cause physical damage to users!
Test Command
AT^SNFI=?
Response(s)
^SNFI:
(list of supported
<inBbcGain>
s) , (list of supported
<inCalibrate>
s)
OK
Read Command
AT^SNFI?
Response(s)
^SNFI: <inBbcGain>
,
<inCalibrate>
OK
Write Command
AT^SNFI= <inBbcGain>
,
<inCalibrate>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge
4
Last
SIEMENS - + + + + + + - + -
<inBbcGain>
(num)(^SNFW)
<inCalibrate>
(num)(^SNFW)