MC55 AT Command Set
16.9 AT^SNFA s
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MC55_ATC_V01.05 Page 404 of 469 2/10/04
Confidential / Released
Parameter Description
Multiplication factor for input samples. Parameter <atten> is identical with <inCalibrate> of AT^SNFI.
Formula used to calculate microphone attenuation (negative gain):
Gain in dB = 20 * log(<atten>/32768)
0...32767(P)...65535
0 Microphone is muted
32767 No attenuation on the microphone path
Notes
• The command is provided for compatibility with M20 and is a subset of AT^SNFI. The parameter <inCali-
brate> of AT^SNFI is identical with <atten> of AT^SNFA.
• To make the changes persistent use AT^SNFW.
Example
<atten>(num)(^SNFW)
^SYSSTART
at^snfa=?
^SNFA: (0-65535)
OK
at^snfa?
^SNFA: 32767
OK
at^snfs=4
OK
at^snfa=1
OK
at^snfa?
^SNFA: 1
OK
at^snfi?
^SNFI: 5,1
OK
at^snfi=5,45
OK
at^snfa?
^SNFA: 45
OK