Voxtel VS600, Service Manual

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VS600 Service Manual
VOXTEL Technical Documentation 62
roubleshooting-RF
7.4.1 RF Subsystem
VS600 employs a transceiver, a power amplifier, an antenna switch, a series of SAW
filters (3 pcs) and a 26MHz VC-TCXO. It also has a Bluetooth IC, a chip antenna,
BALUN filter and a reference clock for Bluetooth IC.
Transceiver IC: MT6129 (MTK), which is GSM850/EGSM/DCS/PCS quad-band design
with GPRS class-12 capability.
Power amplifier: SKY77328 (SKYWORKS), which is capable of supporting GPRS
class12 and quad-band application.
Antenna switch: C085TK (Hitachi metals), which is as the duplexer between transmission
/ reception route for EGSM/DCS/PCS bands.
Saw filter: FUJITSU-B28E 942.5MHZ (GSM900); FUJITSU-B2BG 1842.5MHZ
(GSM1800); FUJITSU-B2BE 1960MHZ (GSM1900).
RF clock reference: 26MHz VC-TCXO, which is the fundamental reference frequency for
transceiver PLL synthesizer and the fundamental frequency of base band chipset after
being divided by two.
Bluetooth IC: CSR -BC313143A - Bluetooth V1.1 and V1.2 compliant.
freq. is 2450MHz.
Reference clock for Bluetooth: TXC -7M26000056 XTAL 26.0MHZ.
Chip antenna: ACX -AT3216 CHIP ANTENNA 2400MHz
7.4 Level 3 & 4 T
BALUN filter: MURATA - LFB212G band-pass filter, whose operation