Q2406E
| Model | Q2406E |
| Description | SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE |
| PDF file | Total 81 pages (File size: 909K) |
| Chip Manufacturer | ETC |
WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
Nevertheless in a 32 Ohms speaker case, you should use a cheaper and
smaller solution : R1 = 82 Ohm et C2 = 4.7µF (ceramic)
The gain of SPK outputs is internally adjusted and can be tuned using an AT
command.
Speaker gain vs Max output voltage
Receive Gain (dB) (*)
Max output level
(Vrms)
1.74
1.38
1.099
0.873
0.693
0.551
0.437
0.347
0.276
0.219
0.174
0.138
0.110
0.087
0.069
0.069
AT+VGR (**)
Max.speaker load (Ω)
+2
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-26
0 to 15
16 to 31
32 to 47
48 to 63
64 to 79
80 to 95
96 to 111
112 to 127
128 to 143
144 to 159
160 to 175
176 to 191
192 to 207
208 to 223
224 to 239
240 to 255
150
50
32
32
32
32
32
32
32
32
32
32
32
32
32
32
(*) analog gain : might not be significant
(**) control of the receive gain by AT commands (for WISMO Quik Q24x6
Series driven by AT commands)
Recommended characteristics for the speaker:
•
•
•
•
Type : 10 mW, electro-magnetic
Impedance : 32 to 150
Ω
Sensitivity : 110 dB SPL min. (0dB = 20µPa)
Frequency response compatible with the GSM specifications
For possible references, see chapter § 4.4.
Page :
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