BenQ March Service Manual page 52

BenQ
EGSM 900 Transmit Signal Path Diagram
U72
C H 62
902.4MHz
902.4MHz
31dBm
27dBm
U75
U73 U 6 6
U67
DC 1.18V
AC 0.46Vpp
C621
DC 1.18V
C622
AC 0.46Vpp
1.3V
0 V
368MHz
-5dBm
：
Legend
chip inductor
chip capacitor
chip resistor
902.4MHz
28dBm
U71
1.6V
0 V
C709
U61
26MHz
D C 1 . 4 V
AC 0.7Vpp
C806
L606
Phone setting
RF toolkit mode
CH 62 : ARFCN
Power Supply Setting : 3.8V
Spectrum Analyzer Trace : Max Hold Mode
800 : scaling factor
6 : Data pattern =>random data=>TSC=5
902.4MHz
5dBm
U74
6.5dBm
C715
3693.6MHz
-2dBm
U64
U85
U63
2.8V
0 V
54
Rev 1.0
3.8V
C704
D
3
U65
1.9V
0 V
2 V
1.6V
2.8V
0 V