Siemens AC75 - Manual (Page 464)

AC75 AT Command Set
18.9 AT^SNFA
s
AC75_ATC_V01.002 Page 464 of 569 10/30/06
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18.9 AT^SNFA Set or query of microphone attenuation
AT^SNFA
specifies the large-scale attenuation on the microphone path of the audio device currently selected
with
AT^SNFS
. The write command is only available in audio modes 2 to 6.
Syntax
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.
Please note that
AT^SNFA
cannot be used to mute the microphone. Therefore,
any attempt to enter 0 will be rejected with error response. Value 0 is returned
only by the read command
AT^SNFA
? after the microphone was muted with
AT^SNFM
=0 during an active call.
32767 No attenuation on the microphone path
Values greater than 32767 will be suppressed to 32767.
Notes
• This command is provided for compatibility with former products (e.g. M20) and is a subset of
AT^SNFI
. The
parameter
<inCalibrate>
of
AT^SNFI
is identical with
<atten>
of
AT^SNFA
.
• To make the changes persistent use
AT^SNFW
.
Test Command
AT^SNFA=?
Response(s)
^SNFA:
(list of supported
<atten>
s)
OK
Read Command
AT^SNFA?
Response(s)
^SNFA: <atten>
OK
Write Command
AT^SNFA= <atten>
Response(s)
OK
ERROR
CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge
4
Last
SIEMENS - + + + + + + - + -
<atten>
(num)(^SNFW)