Siemens MC55 AT manual Atsnfi Set microphone path parameters, Atsnfi=?, Atsnfi?

17.11AT^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

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)

SIEMENS

PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last

! % % % % % ! ! !

Parameter Description

<inBbcGain>(num)(^SNFW)

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

<inCalibrate>(num)(^SNFW)

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!

MC55_ATC_V04.00	Page 412 of 475	3/17/06
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