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GX20
[RF]
BS0
BS1
BS2
RAMPDAC
SYNTHEN
SYNTHDATA
SYNTHCLK
ITXN
ITXP
QTXN
QTXP
TCXOOUT
+B(VTCXO)
TCX951
26MHz
AFCDAC
VCTCXO
1
+B(VRF)
QRXN
QRXP
IRXP
IRXN
CONFIDENTIAL
+B(VRF)
LOGIC
35
39
37
20
21
22
23
36
28,30,31,32,41,46
4
3
38
2
LOOP
33
IF SYNTHESIZER
FILTER
2,13,16,18,47,56
IFVCO
EGSM 975CH - 4CH 656MHz
1,3,6,9,12,14,19
29,34,40,45,48,51
DCS
PCS
24
25
26
27
Figure 3 RF BLOCK DIAGRAM (1/2)
IC991 NL27WZ08
IC992 TC7W00FK
IC993 NL27WZ08
SERIAL DATA
INTERFACE
I&Q
MOD
1/2
90DEG
SHIFT1/2
1/2
1/2
5CH - 124CH 640MHz
512CH - 665CH 640MHz
666CH - 885CH 656MHz
512CH - 810CH 640MHz
PGA PART
PGA
4 – 3
RF
IC901
HD155148TF
PHASE
DETECTOR
1/2
RF SYNTHESIZER
1/2
1/2
90DEG
LNA
SHIFT
90DEG
LNA
SHIFT
90DEG
LNA
SHIFT
1
1
4
4
5
11
1
8
7
5
4
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