AT Command Reference Guide for EDGE Wireless ... - wless.ru

Chapter 17 – Audio Commands
17.10 AT^SNFD Set Audio Parameters to
Manufacturer Default Values
Description:
AT^SNFD sets the active audio parameters to manufacturer defined default values.
The restored values are:
AT^SNFA:
AT^SNFI: ,
AT^SNFO: , [0 to 4],
AT^SAIC: , ,
AT^SNFS:
Test Command Syntax: AT^SNFD=
Response:
OK
Exec Command Syntax: AT^SNFD
Response:
OK
Note:
Remember that the factory set audio mode 1 is fixed to =4. Consequently, AT^SNFD restores
together with =4, but does not affect the values of currently selected in audio
modes 2 - 6. This means, if =1, the read commands AT^SNFO, AT^SNFV and AT+CLVL will always
deliver =4. In all other modes the value is retained until explicitly changed.
17.11 AT^SNFI Set Microphone Path Parameters
Description:
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.
Test Command Syntax: AT^SNFI=
Response:
^SNFI: (list of supported s) , (list of supported s)
OK
Read Command Syntax: AT^SNFI
Response:
^SNFI: ,
OK
Write Command Syntax: AT^SNFI=,
Response:
OK
Parameter Descriptions:
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 is up to 65535 but will be suppressed to 32767. Values above =
65535 will cause a failure.
• The parameter of AT^SNFI is identical with 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!
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 218