Voxtel VS600, Service Manual

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VS600 Service Manual
VOXTEL Technical Documentation 10
3 VS600 Hardware Specifications
3.1 RF Subsystem
VS600 supports 900/1800/1900 bands as well as GPRS function. It supports GPRS
class 10, i.e. the maximum uplink slot number is 2; the maximum downlink slot number
is 4. The key components chosen for accomplishing the above requirements are listed
below:
Power amplifier --- SKY77328 (SKYWORKS), which is capable of supporting GPRS
class12 and quad-band application.
Transceiver IC --- MT6129 (MTK), which is GSM850/EGSM/DCS/PCS quad-band design
with GPRS class-12 capability.
Antenna switch --- C085TK (Hitachi metals), which is as the duplexer between
transmission / reception route for EGSM/DCS/PCS bands.
RF Clock --- 26MHz VC-TCXO, which is the fundamental reference frequency for
transceiver PLL synthesizer and the fundamental frequency of base band chipset after
divided by two.
The block diagram of RF section is as below:
RF Block Diagram