Hagar - Nokia NHL-2NA Series Troubleshooting Instructions

CCS Technical Documentation

HAGAR

troubleshooting
Check with oscilloscope:
-TXi/TXq signals
-VR2,VR4,VR6 =2.7V
-Vref01,Vref02 =1.35V
-Hagar serial interface
-TXP &TXC signals
Check with RF probe
4G VCO o/p signal
3589.6MHz (GSM900)
3495.6MHZ(GSM1800)
Level > -37dBm
Check modulator output
components
Replace faulty
components
Issue 1 07/02
HAGAR
OK?
YES
OK?
YES
YES
OK?
NO
¤Nokia Corporation
Baseband
NO
troubleshooting
Synthesizer
NO
troubleshooting
Replace HAGAR
NHL-2NA
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