![background image](http://html.mh-extra.com/html/samsung/sgh-n600/sgh-n600_service-manual_1190929025.webp)
4-3
SGH-N600 Block Diagrams
4-2-1 RF Tx Part
SGH-N600
RF
Block
Diagram
-
T
x
Part
1
2
3
4
5
-
GSM
:
T
x
level
5
@
6
0
CH
-
DCS
:
T
x
level
0
@
6
9
8
C
H
U307
HD155128TF
Antenna
S/W
U312
U1
17
VP40575
TXEN
RAMPDAC
BAND Selection
- GSM : Low
- DCS : High
ITXP
ITXN
QTXP
QTXN
Loop
Filter
TX VCO
U308
Dual P
A
M
U312
APC IC
U310
890
~
915
MHz
1710
~
1785
MHz
Coupler
15
9
4
4
3
3
U313
U314
1
1
35
8
540 MHz
PCN : 1575 ~ 1650 MHz (Tx)
GSM : 1
150 ~ 1
185 MHz
2
4
5
38
35
20
19
18
17
30
47
5
1
8
1
4
2
5
2
19, 20
Ant. S/W Control
Circuit
3VTXRx
TXEN2
VC1
VC2
VC2
VC1
GSM(Tx)
DCS(Tx)
Rx
H
H
L
L
LL
11
SI4133-MLP28
U306
VCTCXO
13MHz
U305
IF VCO
1080MHz
PLL1
PLL2
RF VCO
AFCDAC
10
23
15
3
2
1