Exalt Communications, Inc.
r-series
Installation and Management Manual
5000007 (ETSI)
61
2007-02-12 (draft)
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 29
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.
•
Current RSL is the measurement of the received signal level at the radio antenna port. This is
the measured level of the RF signal coming from the opposite end of the radio link. The link
was engineered to a specific RSL by the link design engineer, and this RSL should be
obtained during installation and remain relatively stable during the operation of the link. RSL