User's Manual

E1 Spread Spectrum Radios
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Figure 8-40: Remote Loopback Setting
8.7.5 PRBS Test
Under normal working condition, other than the normal BER test, the PRBS function can be used as well to test the
individual link accumulated BER and stability of the system. While detecting, it is required to start the PRBS function.
This function setting is done through the NMS or the LCD display button.
Figure 8-41: PRBS Test
In the System Test window, enter “1” for PRBS Generator. Press Enable. The IDU’s first E1 interface is now
performing the PRBS test. Press Clear All Test to stop all tests or press Disable to stop this test.
Insert an error: Once the PRBS generator is enabled, it will insert PRBS into the selected tributary in order to test
the quality of signal.