User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 16
Issue 1 07/99
D
RF control lines:
RxC (R725) 0–>2.3Vmax during receiving slot
AFC (C747) 0– 1.2V typ. during receiving slot
OK?
Check N200
Analog data signals:
RxIP & RxIN 0–>1.5V DC during receiving slot
Recieved signal is biased to DC, amplitude
50mVpp nominal and frequency 13MHz
OK?
Check N200 if DC fail
or
RF part
No
Yes
No
RF control lines:
TxC (C700) 0–>2.3Vmax during transmit slot
TxP (R706) 0–>2.8V (logical signal) during
transmit slot
OK?
Check N200 if TxC fail
else
Check D300
Analog data signals:
TxIN & TxIP (C709) 0–>0.8V DC during transmit slot
TxQN & TxQP (C708) 0–>0.8V DC during transmit slot
Transmit signal is biased to DC, amplitude 300mVpp
and frequency 64kHz
Yes
No
Yes
OK?
Check RF part Check N200
NoYes
Figure 4–12