Trouble Shooting Guide

Axxcelera Broadband
Troubleshooting-Installing an RF link - 22 - Issue: 5.3.x
Rev 2
7.1.32 Downlink Cell Error Rate
Downlink Cell Error Rate is the downlink cell error rate for a specific AP-SU radio link. This is displayed
in % and is based on CELL RXOK, RXMISSED, and RXBAD from the SU’s MAC stats. It is followed
by an indicator to tell you if the error rate is acceptable. This is actually measuring the percentage of cells
received in error, and this type of error indicates a downstream radio problem. A high downlink cell error
rate may be caused by a problem with received signal strength or quality, or a problem with the AP
transmitter or SU receiver.
7.1.33 Uplink Cell Error Rate
Uplink Cell Error Rate is the uplink cell error rate for a specific SU-AP radio link. This is displayed in %
and is based on CELL TX and tx from the SU’s MAC stats. It is followed by an indicator to tell you if the
error rate is acceptable. It is actually measuring the upstream cell retransmission rate, and upstream cell
retransmissions can be caused by either an upstream or downstream radio problem. However, the
Downlink Cell Error Rate measurement is a more sensitive indicator of downstream radio problems than
the Uplink Cell Error Rate measurement. A high uplink cell error rate may be caused by a problem with
signal strength or quality when the signal from the SU is received by the AP, a problem with the SU
transmitter or the AP receiver, or a downlink problem.