Nokia 3510 서비스 매뉴얼
NHM-8NX
Troubleshooting Instructions
PAMS Technical Documentation
Page 36
ãNokia Corporation
Issue 1 05/02
Figure 17: VPCTRL_G & TXC
Fault finding in modulation
The following plots show different situations of TX IQ measurements. Depending on the
time the modulation may cause the signal to look differently.
time the modulation may cause the signal to look differently.
TX I/Q waveforms
Yellow trace: Vpctrl_G @ power level 5, ch37
Pink trace: TXC GSM900 band
Pink trace: TXQP Blue trace: TXIP - All 1
Pink trace: TXQP Blu etrace: TXIP - Random
Pink trace: TXQP Blue trace: TXIP - All 1
(
Zoom In)
Pink trace: TXQP Blu etrace: TXIP - Random ( Zoo