PAMS
Technical Documentation
NSC/W–1/3
Disassembly & Troubleshooting Instructions
Page 32
Original 11/99
Check VAPC
V:>2.2 V
Check PA input power
P:> 0 dBm
Check TXC
Typ 1.5V@PL2
Change PA
Y
Y
N
Start power control
troubleshooting
Check Z951 filter
insertion loss
Max 4 dB
Change BPF
Change N950
Check COBBA
TXCDAC
(BaseBand)
Check TX–driver input
P:> –20 dBm
Y
N
N
Y
N
Y
N
Check
N980 upconverter
output
P:> –20dBm
Check Z950
insertion loss
Check TX–IF
P:> –25 dBm
f: 196.23 MHz
Check Z900 Insertion
loss, if less than 4 dB
change N750
Y
N
N
Max 4 dB
