User Manual

AirLink Pro T1/E1 Rack MountInstaller’s Guide
Operations and Maintenance
Rev. B - 1/97
4-12
< 10E-xx When there are no errors, the result of the calculation is
displayed as < 10E-xx, where 10E-xx is the number of bits
transmitted, for example < 10E-08.
n.nE-xx When there are errors, the result of the calculation is
displayed as the bit error rate, for example 1.6E-07.
Errored Seconds
An errored second is any one-second interval during which there is a CRC-16
error. Errored seconds can be asynchronous, that is, they do not have to be
correlated with real time. An Errored Seconds (ES) total is maintained in a
database for the previous one hour and the previous 24 hours.
The one hour and 24 hour errored second databases are both updated each time
an errored second occurs. The one hour database is cleared to zero one hour after
the first errored second is logged. The 24 hour database is cleared to zero 24
hours after the first errored second is logged.
Unavailable Seconds
The link is declared unavailable during the time that Radio Sync Loss is
active.
RSQ
Receive Signal Quality (RSQ) is a figure of merit that is normalized on a scale
of 1 to 10, and is a function of the receive signal-to-noise ratio and signal-to-
interference ratio. A strong signal that is severely corrupted with interference
results in a normal receive signal indication and a low RSQ number.
Resetting Performance Counters
To reset the QRSS counter, type the following command at the AirLink Pro
T1/E1 Rack Mount prompt:
AIRLINK PRO T1/E1> reset qrss
The system prompts you to confirm the reset request:
AIRLINK PRO T1/E1> reset qrss
Reset QRSS: Are you sure? (Y/N)
When you enter y (yes) to confirm the request, the system clears the qrss counter.
If you enter n (no) or just press <Return>, the system ignores the reset request. If