Multitech MT64DSU Owner's Manual download pdf (Page 26)

MT64DSU Owner's Manual

Digital Loopback Test With Test Pattern Test

This test allows you to test the local MultiDSU64K, the

communications link, and the remote MultiDSU64K. Use the

following steps to perform the Digital Loopback Test with the Pattern

Test.

With this test enabled, the MultiDSU64K sends and detects a

predefined 511-bit pseudo-random test pattern. When an error is

detected by the MultiDSU64K, the CD (Carrier Detect) LED flashes.

1. Set DIP-Switch #9 on the remote MultiDSU64K to the UP

position.

2. Set DIP-Switch #10 on the local MultiDSU64K 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).

Figure 3-5. Digital Loopback with Test Pattern Test

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Multitech MT64DSU Owner's Manual Page 26