User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
3
. Issue 1.6. Date3/2/99
Page 16 of 22 © Copyright Airspan Communications Corporation 1999
Start
Possible Faults
a) FRU Failure
Are there
any FRU Fail
indications
?
Yes
Single link fail
Fault at ST
Refer to Section 5
No
is 1 modem
reporting link
fail on both
links?
Possible Faults
a) Anntena / Feeder failure
b) LNA failure
c) both monitor cards have
been removed
Possible Faults
a) Modem fail
Are all
Modems on all
shelves
reporting Link
Fail?
No
Yes
are all
Modems on one
shelf reporting
Link Fail?
Possible Faults
a) Analogue Card fail
b) RF Card fail
c) PA fail
Yes
Yes
No
No
Are all
Modems on
two shelves
reporting Link
Fail?
Possible Faults
a) PA fail
b) RX Filter (modem shelves 3&4)
Yes
No
Fault at CT
Refer to Section 4