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17.11
AT^SNFI Set microphone path parameters
controls the microphone path amplification. Read and write options of this command refer to the active
AT^SNFI
audio mode. The write command works only in audio modes 2 to 6.
Syntax
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>,
OK
Write Command
AT^SNFI=<inBbcGain>,
Response(s)
OK
Reference(s)
SIEMENS
Parameter Description
(num)(^SNFW)
<inBbcGain>
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
(num)(^SNFW)
<inCalibrate>
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>
brate>= 65535 will cause a failure.
•
The parameter
<inCalibrate>
•
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!
MC55_ATC_V04.00
Confidential / Released
<inCalibrate>
<inCalibrate>
is up to 65535 but will be suppressed to 32767. Values above
of
is identical with
AT^SNFI
Page 412 of 475
PIN
ASC0 ASC1
MUX1
!
%
%
%
of AT^SNFA.
<atten>
MUX2
MUX3 Charge
%
%
!
!
<inCali-
Last
!
3/17/06
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