Nokia DNT2Mi sp/mp - Manual (Page 43)

Commissioning DNT2Mi
DN01145897 © Nokia Corporation 43 (128)
Issue 2-0 en Nokia Proprietary and Confidential
Note
6.8 Measurements
After all the settings have been checked, we recommend that you carry out a line
quality and a BER test.
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