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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
4.19.6 Checking RX I,Q
To verify the RX path you have to check the pk-pk level and the shape of the RX I,Q.
Figure 4-35. RF3100, WCDMA Transceiver (Bottom)
WRX_I_P
(R129)
WRX_I_N
(R128)
WRX_Q_
P(R127)
WRX_Q_
N(R124)
Figure 4-36-1. RX I,Q signal (CW:2142MHz)
Feed a CW signal at 2142MHz
with a power level of ñ60dBm.
About 2 MHz
Figure 4-36-2. RX I, Q signal
WRX_Q_P (R127)
WRX_Q_N (R124)
WRX_I_N (R128)
WRX_I_P (R129)
Содержание KU580
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