VeEX RXT3900, User Manual

Page: 332 / 383

Go back to top Go back to TOC
General
General Setup
Audible Alarm:
OFF / ON. A sound will generate every time there is an alarm.
Results on start:
OFF / ON. Shows the results screen upon pressing Start.
Auto Save:
OFF / ON. Automaticallys save the test results.
Measurement Clock Source:
Select the Measurement clock source used for Frequency measurement.
For Master: Internal or TX clock source (if external clock source is used)
For Slave: Internal
Service Disruption Test (SDT)
A service disruption is triggered by any qualifying error or alarm determined by the user and continues to count until the error-free
condition (Gate Time) is met. If SDT is enabled and alarm/error triggers are selected, the results will appear in the Results
section under the SDT tab.
Testing Process
The test set measures how long the event remains present after it is first recognized and will continue to measure the total
service disruption time in the event of multiple disruptions.
Before starting, ensure that no errors or alarms are present on the transmission system because this will impact the
measurement.
In the past, Automatic Protection Switching (APS) was used to measure physical service cuts, especially in optical links.
Service disruption measurements are meant to measure the total time the service is not available to customers, which is
not limited by the optical path cut. Therefore, it is configured to include the time the whole system takes to recover.
Service Disruption can still be used to measure APS time, if the trigger selected is LOS only. This will just measure the
physical protection switch time.
SDT CPRI Setup
RXT-3900 e-Manual D07-00-111P Rev A00