User Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 80
2007-06-25
Performance Page
This page provides statistical information about the performance of the system in relation
to the integrity of the user data and the RF link.
Figure 36 Performance page
• The Current BER field indicates the current bit error rate of the link. If the link is
operating perfectly, this should indicate zero. Generally, the link should remain at a
BER less than 1x10
-6
(1 bit out of every million bits errored). This is the threshold
performance specification and the standard to which the link was engineered.
However, radio links can and are affected by weather, interference, and other external
sources and will occasionally have a higher error rate. A link remains operational
unless the BER exceeds 1x10
-3
(1 bit out of every hundred bits errored). Consult the
link design engineer for an understanding of the predicted error rate of the radio link
as it has been designed. Many applications are unaffected by bit errors, but TDM
circuits (for example, T1 or E1) are more sensitive. Also, if the link operator is
providing a service guarantee, this value may need to be monitored or examined in
cases of service issues. The behavior of BER in relation to other alarms or
measurements and external events can be very helpful in troubleshooting activities.