
AUDIO
AT Commands for EV-DO-EV3 Modems
<agc_compr_thres> Compression threshold. This is the input energy threshold above which
compression is applied. Meaningful range is 0x0 to 0x2580. This parameter
must be greater than agc_exp_thres.
Value(agc_compr_thres) = 128
(X+75) : X range is -75 to 0 dBm0mu.
<agc_compr_slope> Compression slope. This is the slope of the compressor gain when
compression is applied. Meaningful range is 0x8000 to 0xFFFF.
Value(agc_compr_sloop) = 65536 * X : X range is 0.50001 to 0.99999.
Notes
These values are automatically saved in non-volatile memory.
Examples
AT#SHFAGCTX?
#SHFAGCTX: 2000,0,F00,FF29,2080,E666
OK
AT#SHFAGCTX=?
#SHFAGCTX: (2000-FFFF),(0,FFFF),(0-2580),(FF01-FFF6),(0-2580),(8000-FFFF)
OK
Handset TX AGC Value Tuning #SHSAGCTX
Set command sets the handset TX AGC value tuning.
Read command returns the current handset TX AGC values, in the format:
SHSAGCTX: <agc_static_gain>,<agc_aig>,<agc_exp_thres>,
<agc_exp_slope>,<agc_compr_thres>,<agc_compr_slope>
Test command reports the supported range of values for
<agc_static_gain>,<agc_aig>,<agc_exp_thres>,<agc_exp_slope>,<agc_compr_thres>,<agc_compr_slope>.
Syntax
Command Command type
AT#SHSAGCTX=<agc_static_gain>,<agc_aig>,<agc_exp_thres>,
<agc_exp_slope>,<agc_compr_thres>,<agc_compr_slope>
Set
AT#SHSAGCTX? Read
AT#SHSAGCTX=? Test
Parameters and Values
<agc_static_gain> Precompressor static gain. This is the gain applied to input samples when
static gain is enabled. Meaningful Range is 0x2000 to 0xFFFF.
Value(agc_static_gain) = 8192
10^(X/20) : X range is 0 to 18 dB.
<agc_aig> Precompressor gain selection flag. Write 0xFFFF to enable adaptive gain
(static gain disabled). Write 0x0000 to enable static gain (adaptive gain
disabled). Meaningful value is just 0x0000 or 0xFFFF.
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