GSM Data Modem AT Command Guide - Scotec - GiSMo Modem

5.12 Gain control +VGR, +VGT5.12.1 Description :This command is used by the application to tune the receive gain of the speaker and the transmitgain of the microphone. The application sends:AT+VGR= for receive gain AT+VGT=for transmit gainAT+VGT=for transmit gainController 1Controller 1Controller 2Controller 20 to 15 +6 db 0 to 31 +30 db 0 +0 db16 to 31 +4 db 32 to 63 +33 db 1 +0,5 db32 to 47 +2 db 64 to 95 +36 db 2 +1 db48 to 63 +0 db 96 to 127 +39 db 3 +1,5 db64 to 79 -2 db 128 to 159 +42 db … …80 to 95 -4 db 160 to 191 +45 db 19 +9,5 db96 to 111 -6 db 192 to 223 +48 db 20 +10 db112 to 127 -8 db 224 to 255 +51 db 21 to 60 +30 db128 to 143 -10 db 61 +30,5 db144 to 159 -12 db 62 +31 db160 to 175 -14 db … …176 to 191 -16 db 101 +50,5 db192 to 207 -18 db 102 to 127 +51 db208 to 223 -20 db 128 to 243 -6,5 db224 to 255 (*) -22 db 244 -6 db(*) For Wismo Quik Q22xx : 224 to 239 : -22db / 240 to 255 : -24db 245 -5,5 db246 -5 db……255 -0,5 dbThe gain values listed here are relative, for absolute (electrical) values please refer to the specifichardware documentation of the module used in the application.5-32