User's Manual

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
205375A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • May 6, 2019 13
SKY66430-11 / SQN66430-11 SiP • Evaluation Board User Manual V1.0
8.0 Troubleshooting Issues
8.1 Most Common Issues
The following is a list of common issues and possible ways to fix the issue.
Symptom Solution
The board doesn’t boot up Check your USB cable connection
No RF signal
Check that the RF cable is properly connected on the UE side and on the eNB
simulator side
Check network coverage
Weak LTE signal
Check that the RF cable is properly connected on the eNB side and UE side
Check that the power level on the eNB is set to a proper level
Check that there is no additional attenuator inserted in the RF cable chain
Check network coverage
No eNB detected
Check that the eNB simulator power is ON and that the cell signal generation
is turned ON
The UE doesn't find the cell signal due
to incorrect frequency value
Check that the band/earcfn value set on the eNB simulator side matches
with the band capabilities of the evaluation board
The UE finds the cell but doesn't attach
due to USIM
Check that the PLMN value of the USIM card used matches with the PLMN
value set on the eNB simulator side
Check the USIM card status with AT+CPIN? ; if ERROR is returned it could be
a HW issue (voltage or USIM wrongly/not inserted) ; if PIN is returned, the
USIM needs to enter a PIN CODE to be unlocked.
The UE finds the cell but doesn't attach
due to eNB not configured for LTE CatM
Check that the eNB is configured for LTE Cat M
The UE finds the cell but doesn't attach
due to eNB sending a NAS Attach Reject
message
Check the APN settings: name, IP type and authentication
eDRX or PSM is not enabled Check that eDRX or PSM is enabled on eNB and UE side
The UE cannot enter IDLE
Check there is no undesirable UL or DL traffic
Verify Windows chatty services