MC55_ATC_V04.00 Page 415 of 475 3/17/06
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17.13 AT^SNFO Set audio output (= loudspeaker path) parameter
AT^SNFO controls the earpiece path amplification. The read and write commands refer to the active audio mode.
The write command works only in audio modes 2 to 6.
Syntax
Parameter Description
Negative DAC gain (attenuation) adjustable in four 6 dB steps from 0 dB to -18 dB (0=0 dB, 3=-18 dB)
0...3
Formula to calculate the value of the 5 volume steps selectable with parameter <outStep>:
Attenuation = 20 * log (2 * outCalibrate[n] / 32768)
0...32767
Volume steps 0 - 4, each defined with outCalibrate[n]
0...[4]
Multiplication factor for the sidetone gain.
Formula to calculate how much of the original microphone signal is added to the earpiece signal:
Sidetone gain in dB = 20 * log (sideTone / 32768).
0...32767
Test Command
AT^SNFO=?
Response(s)
^SNFO: (list of supported <outBbcGain>s), (list of supported <outCalibrate>s), (list of supported
<outStep>s), (list of supported <sideTone>s)
OK
Read Command
AT^SNFO?
Response(s)
^SNFO: <outBbcGain>, <outCalibrate>[0] , <outCalibrate>[1] , <outCalibrate>[2] ,
<outCalibrate>[3] , <outCalibrate>[4] , <outStep>, <sideTone>
OK
Write Command
AT^SNFO=<outBbcGain>, <outCalibrate>[0] , <outCalibrate>[1] , <outCalibrate>[2] ,
<outCalibrate>[3] , <outCalibrate>[4] , <outStep>, <sideTone>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS ! % % % % % ! ! !
<outBbcGain>
(num)(^SNFW)
<outCalibrate>
(num)(^SNFW)
<outStep>
(num)
<sideTone>
(num)(^SNFW)
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