EXFO MaxTester DSL - Manual (Page 39)

MaxTester DSL 33
Band Info
The Band Info tab allows you to view a list of individual upstream or downstream
band parameter details.
³
Band contains Upstream (US) and Downstream (DS)
parameters.
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ADSL lists only 1 of each.
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VDSL lists US0 to 3 and DS1 to 3 possible bands,
depending on the band plan,
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Parameter - Downstream/Upstream
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SNR Margin is the measured current
signal-to-noise ratio margin across all active
sub-carriers, as an amount of increased noise
relative to the measured noise power that the
system would be able to tolerate. Only a value of 6
or above is able to support a bit error rate of 10
-7
.
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Loop Attenuation is the current reduction of the
line and is measured only once during training.
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Signal Attenuation is the current reduction of the signal and is measured
periodically when the line is connected.
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Tx Power is the upstream/downstream transmitting power for the
selected band.
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Output Power is the current transmit power level that is a measure of the
aggregated transmit power.
Data Tests Summary
The Data Tests Summary tab displays the pass/fail status
of the selected data tests enabled in the connection setup.
A successful WAN connection must be established in
order to view the detailed results.
To view individual data test results:
1. Press the up/down navigation keys to select the
desired test.
2. Press to display the test result details.