Chapter 5 – Call Control Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 25
The application sends the following:
AT+VGR=<val> for receive gain AT+VGT=<val>
Controller 1
for transmit gain
Controller 1 AT+VGT=<val>
Controller 2
for transmit gain
Controller 2
0 to 15 +6 db 0 to 31 +30 db 0 +0 db
16 to 31 +4 db 32 to 63 +33 db 1 +0,5 db
32 to 47 +2 db 64 to 95 +36 db 2 +1 db
48 to 63 +0 db 96 to 127 +39 db 3 +1,5 db
64 to 79 -2 db 128 to 159 +42 db … …
80 to 95 -4 db 160 to 191 +45 db 19 +9,5 db
96 to 111 -6 db 192 to 223 +48 db 20 +10 db
112 to 127 -8 db 224 to 255 +51 db 21 +10.5 db
128 to 143 -10 db 22 +11 db
144 to 159 -12 db 23 +11.5 db
160 to 175 -14 db …
176 to 191 -16 db 58 +29 db
192 to 207 -18 db 59 +29.5 db
208 to 223 -20 db 60 +30 db
224 to 255 -22 db 61 +30,5 db
62 +31 db
… …
101 +50,5 db
102 to 127 +51 db
128 to 243 -6,5 db
244 -6 db
245 -5,5 db
246 -5 db
… …
255 -0,5 db
The gain values listed here are relative, for absolute (electrical) values please refer to the specific hardware
documentation of the module used in the application.