Wavetek ANT-20 Operating Manual page 83

ANT-20/ANT-20E
Delay Related Parameters
The "Delay Related Parameters" display field shows the performance parameters affecting the
cell transfer delay for the selected test channel. The overall results are shown under "Total". The
intermediate results are shown under "Intermed." The Total results are for the entire
measurement period up to this point. The Intermediate results are those for the last intermediate
interval. The length of the intermediate interval can be set in the Application Manager.
Min. CTD
Max. CTD
Mean CTD
2-pt. CDVpp
Activity
The "Activity" display field shows additional information about the performance of the analyzed
channel:
Analyzed Cells
LPAC
NCS
Defect Seconds (QoS-Parameter)
The "Defect Seconds" display field shows the defect seconds for the following defects:
VP-AIS
VP-RDI
VC-AIS
VC-RDI
Alarms
Alarms that have occurred (defects) are indicated by a set of LEDs for all test channels together.
Yellow
Yellow and red
Application Guide
Minimum cell transfer delay
Maximum cell transfer delay
Mean cell transfer delay
2-point cell delay variation
Number of cells analyzed. The greater the number of cells evaluated, the
more reliable the values measured for the error- and delay-related
parameters
Indication of "Defect Seconds" for which no performance parameters could
be measured (Loss of Performance Assessment Capability). This can be
due to an alarm in the physical layer, for example. LPAC is a measure of the
availability of the circuit. Each LPAC second is non-available time.
Indication of "Defect Seconds" for which the test channel is not connected
(Not Connected Seconds). This indication is only relevant for switched
virtual circuits (SVC)..
Virtual Path Alarm Indication Signal (F4 layer)
Virtual Path Remote Defect Indication (F4 layer)
Virtual Channel Alarm Indication Signal (F5 layer)
Virtual Channel Remote Defect Indication (F5 layer)
"History": On if the alarm occurred at least once during the entire
measurement interval.
"Current": On when the alarm is active.
Broadband Analyzer/Generator
A-19