HC25 AT Command Set - Portech.com.tw

HC25 AT Command Set
16.6 AT^SNFO
s
16.6 AT^SNFO Set audio output parameter (loudspeaker path)
AT^SNFO controls the audio output path amplification. The read and write parameters of this commands are
related to the current audio mode configured by AT^SNFS. The write command works only in audio modes 2 to
6. Audio mode 1 is write protected for AT^SNFO.
Syntax
Test Command
AT^SNFO=
Response(s)
^SNFO: (list of supported s) , (list of supporteds) , (list of supported s)
OK
Read Command
AT^SNFO
Response(s)
^SNFO: , ,
OK
Write Command
AT^SNFO=, ,
Response(s)
OK
ERROR
Reference(s) PIN USB0-MDM USB0-APP Last
SIEMENS - + + -
Parameter Description
(num)
is basis for digital gain of downlink speech for the purpose of speaker or driver sensitivity adjustment.
The digital gain has a valid range of resulting gain from -84 dB to +12 dB. The resulting gain has to be
calculated according to following formula:
Gain = 20 * LOG ( / 16384 )
value of 16384 corresponds to unity gain and the value 0 to mute state.
0...65535
(num)
is the speaker volume gain control (digital gain).
There are 42 volume gain levels covering the range from -50 dB to +12 dB which are adjustable in steps of 1.5
dB (-50 dB means mute).
(0 = mute, 1 = -48 dB, 41 = +12 dB, 42 steps of 1.5 dB).
0...41
(num)
Multiplication factor for digital gain of the loop-back from speech TX to speech RX path (side tone gain).
The digital gain has a valid range from -96 dB to 0 dB and can be calculated according to following formula:
Gain = 20 * LOG( / 16384 ) - 12 dB
value 16384 results in -12 dB of gain and the value 0 in side tone muting.
0...65535
HC25_ATC_V01.200 Page 256 of 290 7/25/07
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