Technical data

WMO2 G900 / G1800 / G1900
WCOM/GSM/WMO2/WMO2ATDOC Friday 21 May 1999
WAVECOM confidential © 32
4.2.9 Gain control +VGR, +VGT
This command shall be used by the application to tune the receive gain of
the speaker and transmit gain of the microphone. The application shall
send
AT+VGR=<val> for the receive gain AT+VGT=<val> for the transmit gain
0 to 15 +6 db 0 to 31 +14 db
16 to 31 +4 db 32 to 63 +17 db
32 to 47 +2 db 64 to 95 +20 db
48 to 63 0 db 96 to 127 +23 db
64 to 79 -2 db 128 to 159 +26 db
80 to 95 -4 db 160 to 191 +29 db
96 to 111 -6 db 192 to 223 +32 db
112 to 127 -8 db 224 to 255 +35 db
128 to 143 -10db
144 to 159 -12 db
160 to 175 -14 db
176 to 191 -16 db
192 to 207 -18 db
208 to 223 -20db
224 to 239 -22 db
240 to 255 -24 db
16 levels for receive gain are provided and 8 levels for transmit gain.
Application to GSM AT+VGR=25
GSM to application OK Command valid
Application to GSM AT+VGT=45
GSM to application OK Command valid
4.2.10 Microphone Mute Control +CMUT
Command syntax: AT+CMUT = <mode>