4. TROUBLE SHOOTING
- 90 -
• Tx Local and IF signal (RF2 and IF)
– GSM Tx Frequency = RF2 – (IF / 2)
– DCS Tx Frequency = RF2 + (IF / 2)
– PCS Tx Frequency = RF2 + (IF / 2)
• PAM – input and output signals
– Power Amp Module
• Amplifies Tx Signal from Si4205
– Tx Carrier Frequency
• GSM : 824 ~ 849MHz
• DCS : 1710 ~1785MHz
• PCS : 1850 ~ 1910MHz
IF Frequency [MHz]
IF/2 Frequency [MHz]
RF2 Frequency [MHz]
Tx Frequency [MHz]
GSM850
824 ~ 849
1272 ~ 1297
896
448
GSM1800
1710 ~ 1785
1327 ~ 1402
766
383
GSM1900
1850 ~1910
1423 ~ 1483
854
427
Vbat
GSM input
DCP/PCS input
GSM output
DCP/PCS
output
Содержание L1150
Страница 1: ...Service Manual Model L1150 Service Manual L1150 P N MMBD0034601 Date June 2004 Issue 1 0 ...
Страница 3: ......
Страница 18: ...3 H W Circuit Description 17 Figure 1 Receiver Part Block Diagram ...
Страница 42: ...3 H W Circuit Description 41 A BaseBand Components Component Side ...
Страница 43: ...3 H W Circuit Description 42 B BaseBand Components Keypad Side C Digital Baseband DBB Processor ...
Страница 51: ...4 TROUBLE SHOOTING 50 BaseBand Part Troubleshooting 4 1 Baseband Components Component Side 4 TROUBLE SHOOTING ...
Страница 102: ...5 DISASSEMBLY INSTRUCTION 101 5 DISASSEMBLY INSTRUCTION 2 1 1 2 ...
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Страница 113: ...7 BLOCK DIAGRAM 112 Baseband Part 7 BLOCK DIAGRAM The Block Diagram of the Baseband Part ...
Страница 122: ... 121 9 PCB LAYOUT ...
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