Acterna ANT-5 - Injection of Code Errors; Injection of Defects

The SDH Access Tester application
Page 66 Acterna ANT-5
Up to 4,800,000 consecutive frames can be errored. In this example, 2 consecutive
frames are errored every 5 frames.
2 frames
Repetition period = 5 frames
Note: The value for the Repetition Period is always greater than the value of the
Frames. The ANT-5 will automatically adjust the values if necessary.
4.11.3 Injection of Code errors
To allow for in-service performance
analysis, E1 (2M) code errors can be
injected into the PDH structure.
Continuous errors are injected at a
ratio of 1x10
-n
where n = 3 to 8.
Note: Ensure that PDH is selected as
the hierarchy type and the PDH Rate
is set to 2M.
4.11.4 Injection of Defects
The Injection page can also be used
to inject a range of different defects
into the transmit structure.
The type of defect to be injected is
selected from the Type list box. The
list of available defect types depends
on the type of framing being used,
and also whether SDH or PDH
hierarchies and line interfaces have
been selected.
To inject a defect into the Tx path,
select the type of defect required and
press the Inject firm key. The Inject firm key will now be depressed and the injection
icon, , displays an animated syringe when defects are being injected. To stop
injecting, press the Inject firm key, the injection icon now disappears.