LG KU580 Service Manual - Page 155
C. GSM RF Level Check
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4. TROUBLE SHOOTING C. GSM RF Level Check ➀ GSM/EDGE PA (+ Ant. SW) U101 ➁ DCS PCS GS Rx Rx M Rx GSM Transceiver U200 Figure 4-49. GSM/DCS/PCS Rx path v Agilent 8960 Setting CW Mode GSM : -50dBm@Ch65(948MHz) DCS : -50dBm@Ch700(1842.8MHz) PCS : -50dBm@ch700(1967.8MHz) Check GSM/DCS/PCS Rx signal level at ➁. GSM:-51.5dBm DCS/PCS:-51.7dBm No Yes GSM Rx path OK. Change Ant. SW module (U101) LGE Internal Use Only - 156 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
C. GSM RF Level Check
GSM/EDGE
PA (+ Ant.
SW)
U101
GSM Transceiver
U200
DCS
Rx
PCS
Rx
GS
M
Rx
➀
➁
Figure 4-49. GSM/DCS/PCS Rx path
GSM Rx path OK.
Check GSM/DCS/PCS
Rx
signal level at
.
v Agilent 8960 Setting
CW Mode
GSM : -50dBm@Ch65(948MHz)
DCS : -50dBm@Ch700(1842.8MHz)
PCS : -50dBm@ch700(1967.8MHz)
Yes
GSM:-51.5dBm
DCS/PCS:-51.7dBm
Change Ant. SW module
(U101)
No
➁