Wavetek ANT-20 Operating Manual - Introduction
Introduction
I-1
ANT-20/ANT-20E
Extended Overhead Analysis
Introduction
1
Functions
The “Extended Overhead Analysis” option provides further useful functions for your ANT-20:
•
Recording of selected Section Overhead (SDH) or Transport Overhead (SONET) bytes.
•
Recording of selected Low or High Path Overhead (POH) bytes.
•
Recording of TCM protocols (Tandem Connection Monitoring) in the N1 / Z6 byte (SONET)
or N1 / N2 byte (SDH).
•
Monitoring of TCM alarms in a separate display window.
•
Error count of TCM measured values:
– TC-IEC
– TC-Diff (B3-IEC or BIP2-IEC)
– TC-REI
– TC-OEI
•
Measurement of the circuit switching or dead time when Automatic Protection Switching
(APS) is used.
This allows you to check simply if the APS protocol is adhered to and that the maximum
permitted switching time is not exceeded.
To simplify this task, the APS codes are output in plain text when bytes K1 and K2 of the
overhead are recorded.
You can also specify maximum value for the APS switching time, to provide a simple PASSED
or FAILED result immediately after the measurement.
The TCM function allows you to investigate the TCM protocols received and carry out an error
count and alarm monitoring.
The settings required are made using the optional dialog windows of the following virtual
instruments:
•
Signal Structure (APS)
•
Overhead Analyzer (recording overhead bytes)