EG_GenProxxe_988_UG_008_UK
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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO&GENER reserves the right to make any modifications.
The gain of the microphone input may be internally adjusted in 3dB steps to b30dB to +51dB by
using the command
AT+VGT
(see the Wavecom “AT Commands Interface Guide”).
Table : Pins description
Signal name
Pin number Sub HD
Connector
I/O
Type
Description
CMIC2P 4 I
Analogue
Microphone
+ve
CMIC2N 5 I
Analogue
Microphone
-ve
7.8.2 Loud-speaker
Differential outputs are used to help reduce common–mode and TDMA noise.
The internal push-pull amplifier will drive load of between 32 and 105 Ohms and 1nF (see details in the table
Speaker gain verses Max output voltage in the Wavecom "AT Commands Interface Guide").
The loud-speaker may be connected directly to the output pins.
The amplifier gain may be adjusted from between –22dB to +6dB in 2bB steps using the command
AT+VGR
(see the Wavecom “AT Commands Interface Guide”).
Table : Pins description
Signal name
Pin number Sub HD
Connector
I/O
Type
Description
CSPK2P 10 O
Analogue Loud-speaker
+ve
CSPK2N 15 O
Analogue Loud-speaker
-ve
7.8.3 Buzzer output
As an option, the GenPro provides a buzzer output on pin 1 of the15-pin Sub-D connector (instead of the
DCD signal). This output provides a frequency intended to drive a
Transducer
.
Table : Pins description
Signal
Pin number Sub HD
Connector
I/O
Type
Description
Buzzer 1 O
Analogue
Buzzer
output
AT+WTONE
: This command allows a tone to be played on the speaker or the buzzer. The frequency, gain
and duration of the tone may be specified: