Remotek RP12 WCDMA, Manual

Page: 31 / 34

© 2010
Company Confidential
31
Possible Reason Troubleshooting
(1). RxQual of donor signal is originally bad.
(2). Adjacent-channels or Co-channels were
introduced by the repeater system.
(3). Self-oscillation occurs.
(4). Too many BCCH channels were
introduced. (Frequent handover may
downgrade the signal quality).
(1). Re-orientate or re-locate donor ant. in order to find
another donor signal. The alternative way is to contact
the engineer of operator to fix the BTS problem.
(2). Re-orientate or re-locate donor ant. and try to increase
the ratio C/A or C/I (To let the major signal as stronger
as possible, and make the adjacent-channel or co-
channel signals as weaker as possible).
(3). Isolation is possibly insufficient, and the alarm of “AGC”
(Over AGC range) shall light. Try to increase the
separation between service ant. and donor ant. (It’s a
little difficult for complicated DAS indoors).
(4). Re-orientate or re-locate donor antenna in order to
introduce one major BCCH (The major BCCH must be
6 dB higher than its 1
st
strongest neighbor).
Q2: Poor speech quality in the coverage area
Troubleshooting