Exalt Communications, Inc.
EX-5i Installation & Management
5000005
51
2006-05-17
RSL in relation to other alarms or measurements and external events can be very
helpful in troubleshooting activities.
•
Errored Seconds (ES) indicates the total number of seconds that have occurred where
there has been at least one bit error, since the last time that the radio statistics counter
has been reset. Generally, ES are not a significant concern, so long as they are not
continuous or above the anticipated performance based on the original link
engineering goals. If ES are continuous or at a high rate, this is normally an indication
of poor link performance due to poor RSL or interference, or severe impact by
weather or other environmental factors. However, similar to the performance factors
listed above, ES can and will occur in any radio link. Once again, the link engineer
should be consulted to determine the original design goals, and compare actual
performance to these expectations to determine if any improvements are necessary or
if other problems may be causing excessive ES.
SES (as described below) do not register as ES. In other words, the ES counter will
count ONLY seconds that are errored and are not SES.
•
Severely Errored Seconds (SES) are similar to ES, but this counter keeps track of
every second where the bit error rate exceeds 1x10
-3
, over the period since the last
counter reset. If SES are continuous or at a high rate, this is normally an indication of
poor link performance due to poor RSL or interference, or severe impact by weather
or other environmental factors. However, similar to the performance factors listed
above, SES can and will occur in any radio link. Once again, the link engineer should
be consulted to determine the original design goals, and compare actual performance
to these expectations to determine if any improvements are necessary or if other
problems may be causing excessive SES.
•
Minimum RSL indicates the worst-case Received Signal Level that has occurred since
the last counter reset. It can be helpful to know if the RSL has dropped significantly
from normal level, or has reached a level near or below threshold.
•
Maximum RSL indicates the best-case RSL that has occurred since the last counter
reset. This indicates the best performance that the radio link has seen, which is
normally equal to the installed value, which is usually the designed value.
•
Time Since Reset indicates the amount of time that has passed since the last counter
reset. This can help quantify the seriousness of other statistics, such as ES and SES,
such as if there have been high numbers of ES and/or SES over a relatively short
period of time.
Each end of the link statistics on this page can independently be reset using the Reset Statistics
button for the Local or Remote radio. It is good practice to reset the statistics at the time that the
link is commissioned (after all antenna alignment is complete and stable RSL at designed levels
is achieved, and no more system reboots are anticipated). It is also a good practice to re-visit this
statistics page on a regular basis, make records of the performance and reset the statistics so that
counters can more precisely pinpoint issues.
Resetting statistics from one end will also reset the statistics for the same radio at
the opposite end. That is, if the Local statistics are reset, logging into the remote
