Siemens MC55 - Manual (Page 411)

MC55 AT Command Set
16.13 AT^SNFO
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MC55_ATC_V01.05 Page 411 of 469 2/10/04
Confidential / Released
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
Notes
• The write command works only in audio modes 2 to 6.
• The read and write commands refer to the active audio mode.
•
<outCalibrate>
specifies the amount of volume of each
<outStep>
. The range of each
<outCali-
brate>
is up to 65535, but will be suppressed to 32767. A value above
<outCalibrate>
= 65535 will cause
an error.
• The range of
<sideTone>
is up to 65535, but will be suppressed to 32767. A value above
<sideTone>
=
65535 will cause an error.
• Any change to
<outStep>
takes effect in audio modes 2 to 6. That is, when you change
<outStep>
and
then select another mode with
AT^SNFS
, the same step will be applied. Nevertheless, the sound quality and
the amount of volume are not necessarily the same, since all remaining audio parameters can use different
values in either mode.
• Audio mode 1 is fixed to
<outStep>
=4. In this mode, any attempt to change
<outStep>
or other parameters
returns an error.
• The value of
<outStep>
is stored non-volatile when the ME is powered down with
AT^SMSO
or reset with
AT+CFUN
=x,1. Any other parameters changed with
AT^SNFO
need to be saved with
AT^SNFW
for use after
restart. See also
AT^SNFD
for details on restoring factory defaults.
• The values of
<outStep>
can also be changed with
AT^SNFV
and
AT+CLVL
.
• CAUTION! 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!
<outCalibrate>
(num)(^SNFW)
<outStep>
(num)
<sideTone>
(num)(^SNFW)