Quectel GSM Series - About the Document

GSM/GPRS Modules
GSM Module Audio Design Guide
GSM Module Audo Design Guide Confidential/Release 2 / 35
About the document
History
Revision
Date
Author
Description
1.0
2009-11-02
Tracy Zhang
Initial version
1.1
2009-11-20
Tracy Zhang
1. Added some acronym.
2. Added a Audio Power Amplitude manufacturer.
3. Added a solution to TDD noise.
4. Modified cover.
1.2
2010-11-20
Roy Chen
1. Added a diagram of audio channel
3.0
2013-05-24
Jerry You
1. Added reference design of audio circuit
(M1x, M95, M80).
2. Added AT command AT+QAPS.
Quectel
Confidential