Technical data

Chapter 11 305
E1 Analyzer
Making E1 Measurements
E1 Analyzer
Sample Hard Loop/End-End Full E1 BERT Test
You can use this test mode to perform measurements such as BERT on an E1 circuit.
This example explains how to setup a hard-loop/ene-end full E1 BERT test. A hard
loop test requires one test set at one end, and a hard loop at the other. An end-end
test requires a test set at each end, but enables the troubleshooter to identify the
direction of the trouble. The E1 circuit is not available for service when using this
test mode.
During the commissioning or startup phase of an E1 circuit, a several day
end-to-end or hard loop test is often performed. This type of test provides the most
comprehensive level of information, but does require that the circuit be taken out of
service for the duration of the test. The test results provide more granular resolution
on root cause problems than does a monitor test.
Figure 11-1 Sample End to End Connection Using a Terminate Connection with a Dsx
Service Panel
Sample Hard Loop/End-End Full E1 Test:
OUT
OUT
IN IN
To Base
Station
From
Channel
Service
Unit
Primary
Rx Tx
DSX Service panel Test Set
Step Notes
1 [Mode]
2 [Backhaul]