Telit EVK2 User Guide
1vv0300704 Rev.13- 2012/06/25
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page
7 of 149
7.
Audio Section ....................................................................................................................... 28
7.1.
Overview ............................................................................................................................................. 28
7.1.1.
History ................................................................................................................................................ 28
7.2.
Actual ................................................................................................................................................... 29
7.2.1.
The choice .......................................................................................................................................... 29
7.3.
Differential and Single Ended ........................................................................................................... 29
7.3.1.
Concepts ............................................................................................................................................. 29
7.3.2.
Benefits and disadvantages ................................................................................................................. 30
7.3.3.
Settings ............................................................................................................................................... 31
8.
AF Amplifiers Setting ......................................................................................................... 32
9.
Audio outputs ....................................................................................................................... 33
9.1.
Low AF Power Mode ......................................................................................................................... 33
9.2.
High AF Power Mode ......................................................................................................................... 34
9.2.1.
Speaker and Stand-alone Microphone ................................................................................................ 35
9.2.2.
Speaker plus Headset .......................................................................................................................... 36
10.
Audio Accessories ............................................................................................................ 37
10.1.
Headset ................................................................................................................................................ 37
10.2.
Stand-alone microphone .................................................................................................................... 38
10.3.
Speaker ................................................................................................................................................ 38
11.
Indication and services .................................................................................................... 39
11.1.
Optical Indicators ............................................................................................................................... 39
11.1.1.
Status Led ........................................................................................................................................... 39
11.1.2.
CHARGE Led .................................................................................................................................... 40
11.2.
Switches ............................................................................................................................................... 41
11.2.1.
POWER ON Switch ........................................................................................................................... 41
11.2.2.
RESET Switch .................................................................................................................................... 41
12.
Connectors pinout ............................................................................................................ 42
12.1.
Motherboard to Module .................................................................................................................... 42
13.
Module Interface Boards ................................................................................................ 45
13.1.
Generality ............................................................................................................................................ 45
13.2.
Short Description ................................................................................................................................ 45
13.3.
Further Accessories for GPS version ................................................................................................ 45
14.
GM862 Interface .............................................................................................................. 46
14.1.
Stand-alone setup ............................................................................................................................... 46
14.2.
Interface connectors ........................................................................................................................... 47
14.3.
Content of the kit ................................................................................................................................ 47
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