Owner`s manual

Chapter 4 - Troubleshooting
37
4.3.3 Digital Loopback With Test Pattern Test
This test allows you to test the local MT56DSU-R, the
communications link, and the remote MT56DSU-R. Use the
following steps to perform the Digital Loopback Test with the Pattern
Test.
With this test enabled, the MT56DSU-R sends and detects a pre-
defined 15-bit pseudo-random test pattern. When an error is
detected by the MT56DSU-R, the NS (No Signal) LED flashs.
1. Set DIP switch #9 on the remote MT56DSU-R to the down
position
2. Set DIP switch #10 on the local MT56DSU-R to the down
position.
3. The test pattern is generated and either detected as a good test
pattern (test patterns match) or as a failed test (test pattern
received does not match the pattern sent).
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