Nokia DNT2Mi sp/mp user manual Measurements

Commissioning DNT2Mi

6.8Measurements

After all the settings have been checked, we recommend that you carry out a line quality and a BER test.

Note

Before starting the BER test, reset all statistics and error counters. Read statistics and error counters after the BER test.

Noise margins, Rx and Tx line levels, and attenuations (Q1: 7,1...3)

Establish a link between two units. After the line is up, check the noise margin, Rx level, and line attenuation from the Measurements menu.

You can use Table 28 in Appendix A to mark down the results for line attenuation.

Bit error rate test

We recommend you to perform a five-minute bit error rate (BER) test. For the test, you need an external test equipment.

You can use Table 27 in Appendix A to mark down the results.

After the tests

Check that all alarms have disappeared and the statistics are still correct.

Table 3.	Monitoring a line
Tx level
Line 1 or 2: xx dBm		xx = +7.5 to +14.5 dBm
Rx level
Line 1 or 2: xx dBm		xx = +14.5 to -26 dBm
Noise margin
Line 1 or 2: xx dB		xx = 0 to +15 dB
Attenuation
Line 1 or 2: xx dB		xx = 0 to 41 dB

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