User's Manual

VS500 USER MANUAL
Confidential & Proprietary of VACOM 4/13 Page Date : 05-08-08, Rev No : 1.0
Control No.: MSD351A0VS500
Originated by Hard Ware 3 Team
- Receiver Band : -81dBm/1MHz
- Transmitter Band : -61dBm/1MHz
- Other Band : -47dBm/30KHz
Ch 3. CIRCUIT DESCRIPTION
3.1 GENERAL
- RF (Radio frequency) Block & Base band Block
- Audio/Logic Part, Receiver Part, Transmitting Part,
- Audio/Logic Part : Power Management, Base band Signal Processor, Audio, User Interface, PC
Interface, Clock, RX/TX Control
- TX Part : Transmitter part converts the frequency of signal to transmit into radio frequency,
amplifies the signal and transmits signals to Base Station through Duplexer and Antenna.
- RX Part : Receiver part amplifies received signal through LNA (Low Noise Amplifier) and
converts it into base band frequency.
3.2 AUDIO/LOGIC PART
a. Mobile Station Modem: U1 (MSM6000)
b. Memory: U4 (PH28F160C3BD70) - 16Mbit Flash ROM
U2 (K6F4016U6G-AF70) - 4Mbit Static RAM
U5 (CAT24FC256WI) - 256Kbit EEPROM
c. Power Management: U3 (PM6610-2)
d. Audio Amplifier & Audio Interface: U10 (TPA751DGN)
e. KEY PAD / LCD MODULE
f. Mini USB Type Connector(Support only RS232C)