ADTRAN 1200270L1, Manual

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Chapter 11. Testing and Troubleshooting
61200270L1-20 DSU III ARdc User Manual 11-15
Interpreting Test Results
A BERT tester must be used to interpret the test results of a
DTE O
NLY
test.
DTE With Test Pattern
The DTE
WITH
TP (test pattern) test is similar to the DTE O
NLY
test de-
scribed previously except the test pattern is generated using the DSU/
CSU internal test pattern generator. This test can be used to detect defi-
ciencies within the internal drivers and receivers of the DSU III ARdc. Fig-
ure 11-11 illustrates the loopback point and the data paths for this test.
Figure 11-11. DTE with Test Pattern
Test Purpose
A DTE test using a test pattern is used for the following purposes:
• Verify integrity of the DTE interface.
• Verify integrity of connection between DTE and DSU III ARdc.
Initiating
Follow the menu path outlined in Figure 11-12 on page 11-16 to initiate a
DTE T
EST USING A
T
EST
P
ATTERN
.
DTE
LOCAL
DSU/CSU
Rx
Tx
Rx
Tx
Rx
Tx
Test Pattern
Generator
Error
Inject
Test Pattern
Detector
Error
Clear