Specifications

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
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Microphone gain vs Max input voltage (using controller 2)
Transmit Gain (dB) Max Vin (mVrms) AT+VGT
- 6.5 3031 128 to 243
-6.0 2861 224
… … …
0.0 1434 0
… … …
+9.5 480 19
+10.0 454 20
+ 30.3 43.80 21 to 60
+ 30.8 41.36 61
… … …
+ 50.8 4.14 101
+ 51.3 3.90 102 to 127
Recommended characteristics for the microphone:
•
2V – 0.5mA
•
2 KOhms
•
Sensitivity -40 to –50dB
•
SNR > 50dB
•
Frequency response compatible with the GSM specifications
For possible references, see § 4.3.