Sony Ericsson T230, T290 1 free download

File name SONY ERICSSON T230, T290 1.pdf

1 (34) OPERATIONAL DESCRIPTION CONFIDENTIAL Prepared (also subject responsible if other) No. SEM/CA/PT/ Bryan Thornton 1551-KRH 101 297 Approved Checked Date Rev Reference SEM/CA/PT/ 16 Nov 2004 A Description of Operation Dual Band GSM Transceiver Unit TABLE OF CONTENTS 1 Revision History ...3 2 General...3 3 Transceiver Overview...4 3.1 Mechanical construction ...5 3.2 RF parts...5 3.2.1 GSM 900 ...5 3.2.2 DCS 1800...5 3.2.3 Frequency generation ...5 3.2.4 Receiver ...7 3.2.5 Transmitter ...7 3.3 Logic/audio part...7 3.3.1 Functions...7 4 Antenna ...8 5 External connectors...8 6 Battery ...9 7 Detailed Description of Radio Circuits ...9 7.1 CROSS REFERENCES ...