Sagem SAGEM-LINK F - 2.5 - Tributary Tests

SAGEM-LINK F 288055571-04
Installation and Operation Manual
Page 38/142
Issue 04 : July 2005
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2.5 - Tributary Tests
These tests are to be done on both ends of the link.
Using a BER analyzer with G821 capability, test all used 2 Mbit/s access.
BER Analyzer Settings :
• Transmit to Receive test
• 2 Mbit/s
• Internal Clock
• PRBS : 2
15
-1.
• 120 Ohm balanced, or 75 Ohm unbalanced depending on IDU configuration.
All used tributaries are to be tested one by one :
• Click on the button
(top left of the toolbar on main screen) or use the menu : "Tools /
Tributaries". The tributary screen appears.
• Verify that the tributary under test is configured in normal mode (N), with active service
(A), and no loopback (blank button).
• All other tributaries should be unconnected and configured as inverted (I)
• Normally there should be a local tributary alarm.
• Connect a 2 Mbit/s BER analyzer on the tributary input. Be sure to use a cable in the same
impedance (refer to "Interface" indication). The tributary alarm should be now cleared.
• Click on the loopback button to have access to loopback configuration screen, and select a
remote loopback for the tributary under test. (For loopback procedure refer to Chapter 3,
section 3.2.4).
• Verify on the BER analyzer that there is no error occurred during one minute
• Once the test has been done, disconnect the cable, and change Data alarm in invert mode
(I), and remove remote loopback for this tributary.
• Repeat this test for all used tributaries.