Top Rf-Related Failures Seen In Finui - Nokia RM-11 Series Troubleshooting Manual

CC Technical Documentation

Top RF-related Failures Seen in FINUI

Test Failed
RF MS TX Rho PCS CH600
RF MS RX FER PCS CH600
RF MS RX FER CELL CH384
RF MS SINAD
RF GPS Test Mode 3
RF MS TX Limiting Po PCS CH25
RF MS TX Limiting Po CELL CH1013
Issue 2 09/2005
What to Check
Rho problem is very likely caused by elevated spurious
levels in UHF LO and/or by VHF Tx LO in N601. Establish
a call and verify the degraded Rho. Next probe the LO
output for spurs.
At this stage, FER is most likely caused by a poor RF
connection. Perform a conductive RSSI measurement
with sector power at -65dBm (low LNA gain) and -
100dBm (high LNA gain).
At this stage, FER is most likely caused by a poor RF
connection. Perform a conductive RSSI measurement
with sector power at -65dBm (low LNA gain) and -
100dBm (high LNA gain).
SINAD is measurement of a mobile terminal's audio
quality in an AMPS call. Hence, a secured audio plug is
needed to be checked for any connection problem.
Verify this on the bench in an AMPS call.
Inject signal and test SNR with the GPS self-test. If
SNR is out-of-limits, then probe chain.
Tx limiting power is most likely caused by a poor RF
connection.
Tx limiting power is most likely caused by a poor RF
connection.
© 2005 Nokia Corporation
Troubleshooting - RF
Confidential
RM-11
Page 29