5. Trouble shooting
5.15.3 Checking PAM Control Signals
| TQM7M5005 | U600 |
15 | PGND | GSM850_900_IN 7 |
8 |
| 6 |
11 | GND3 | TX_EN |
| GND2 |
|
R609 1
R610 1
TXLB PA_EN
PA_EN TX_RAMP
14 | GND1 | VRAMP | 5 |
9 | BY_CAP2 | VBATT | 4 |
13 | BY_CAP1 | BS | 3 |
10 | GSM850_900_OUT | MODE_SELECT | 2 |
12 | DCS_PCS_OUT | DCS_PCS_IN | 1 |
R611 10K
TX_RAMP
R612 1
PA_BAND PA_MODE
|
| R613 | 1 |
|
|
| PA_MODE |
|
| R614 | 1 |
|
|
| TXHB |
C636 | C637 | C638 |
|
DNI | DNI | 47p |
|
PAM Control Signals
PA_MODE
TX RAMP
PA_EN
Transceiver Output
MODE | MODE | PA_LEVEL | TXON_PA |
|
|
|
|
GMSK | LOW | Ramp Burst Control | HIGH |
|
|
|
|
8PSK | HIGH | Control Amp bias | HIGH |
|
|
|
|
PAM Mode Operation
Copyright © 2008 LG Electronics. Inc. All right reserved. | - 99 - | LGE Internal Use Only |
Only for training and service purposes |
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