FLY E195, Service Menu

Page: 7 / 30

E195 Service Menu
6
Host RF Launch Principle Diagram
2.3 Receive
Accessed from the antenna, GSM signal arrives at AERO4210HNN through the front end
SAW filter; and it converts to I/Q signal which modulated in 100 KHZ carrier. Then, it goes
through the band-pass, getting amplification (gain controllable), filtering, amplifier (gain
controlled); and mixes to baseband signal 4-road I/Q. Finally, it outputs to CPU for
processing after filtering. In diagram, SDATA, SCLK are I2C serial signals, responsible for
the communication work between MSW8533N and AERO4210HN; LE is MSW8533N
enable signal of AERO4210HN; RFVCOEN is enable signal which can generate
frequency mixing vibration signal VCO; VAFC is automatic frequency control signal of
crystal oscillator.
Host RF Receive Principle Diagram
I2C
IQ
MT6129
MT6225
PA
同 轴 开 关 及
天 线 匹 配 电
ANT
匹 配 网
匹 配 网
GSM TX
路径
DCS TX
路径
频段选择信号
Transceiver
BB
AMS
RF
发射输出
RF
Launch output
Coaxial Switch
&Antenna
matching circuit
Band selection signals
GSM TX Path
DCS TX Path
Transceiver