User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 41
Issue 1 07/99
5.3. Fault finding chart for PCN transmitter
Oscilloscope
SUMMA N700 pin 41 VREF Vdc = 1.5 Volt
SUMMA N700 pin 27, 47 VTX Vdc = 2.8 Volt
SUMMA N700 pin 32 TXP Vdc > 2.5 Volt
CRFU3 N600 pin 8, 47 VSYN_2 Vdc = 2.8 Volt
CRFU3 N600 pin 39 VTX Vdc = 2.8 Volt
NO
YES
OK
Check
BaseBand
Oscilloscope
SUMMA N700 pin 1 TXQN Vac = 0.4 Vpp, Vdc = 0.8 V
SUMMA N700 pin 2 TXQP Vac = 0.4 Vpp, Vdc = 0.8 V
SUMMA N700 pin 3 TXIP Vac = 0.4 Vpp, Vdc = 0.8 V
SUMMA N700 pin 4 TXIN Vac = 0.4 Vpp, Vdc = 0.8 V
OK
Check
BaseBand
Spectrum analyser
SUMMA N700 pin 46
232 MHz
Pout = –11 dBm
Check
SUMMA
VHF Synthesizer
Spectrum analyser
CRFU3 N600 pin 35, 37
232 MHz
YES
YES
NO
NO
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