參數資料
型號: Q2426E
廠商: Electronic Theatre Controls, Inc.
英文描述: SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE
中文描述: 自成一體的位置的GSM / GPRS或850/1900畢帶模塊900/1800
文件頁數: 34/81頁
文件大?。?/td> 922K
代理商: Q2426E
WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
confidential
Page :
34 / 81
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à
des tiers sans son autorisation préalable.
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) (*)
(Vrms)
AT+VGR (**)
Max.speaker load (
)
Max output level
+2
1.74
0 to 15
150
0
1.38
16 to 31
50
-2
1.099
32 to 47
32
-4
0.873
48 to 63
32
-6
0.693
64 to 79
32
-8
0.551
80 to 95
32
-10
0.437
96 to 111
32
-12
0.347
112 to 127
32
-14
0.276
128 to 143
32
-16
0.219
144 to 159
32
-18
0.174
160 to 175
32
-20
0.138
176 to 191
32
-22
0.110
192 to 207
32
-24
0.087
208 to 223
32
-26
0.069
224 to 239
32
-26
0.069
240 to 255
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
Sensitivity : 110 dB SPL min. (0dB = 20μPa)
Frequency response compatible with the GSM specifications
For possible references, see chapter § 4.4.
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