Line Diagnostics Test Parameters - ZyXEL Communications Multi-service Access Platform MSAP2000 User Manual

MSAP2000 AAMS User's Guide

21.3 Line Diagnostics Test Parameters

The following table lists the line diagnostics test parameters that display, see the
ITU-Tís
G.992.3 for more information.
Table 55
LABEL
number_of_
subcarries
hlinScale
latn
satn
snrm
attndr
farEndActatp
i
li.rl
li.im
Line Diagnostics Test Parameters
DESCRIPTION
Discrete Multi-Tone (DMT) modulation divides up a line's bandwidth into sub-
carriers (sub-channels) of 4.3125 KHz each.
The first number is the total number of DMT sub-carriers the ADSL connection is
using. The second number indicates how many upstream DMT sub-carriers the
ADSL connection is using.
The channel characteristics function is represented in linear format by a scale
factor and a complex number. These are the maximum upstream and
downstream scale factors used in producing the channel characteristics function.
This is the upstream and downstream Line Attenuation (in dB).
This is the upstream and downstream Signal Attenuation (in dB).
This is the upstream and downstream Signal-to-Noise Ratio Margin (in dB). A
DMT sub-carrier's SNR is the ratio between the received signal power and the
received noise power. The signal-to-noise ratio margin is the maximum that the
received noise power could increase with the MSAP2000 AAMS still being able to
meet its transmission targets
This is the upstream and downstream Attainable Net Data Rate (in bit/s).
This is the upstream and downstream Far End Actual Aggregate Transmit Power
(in dBm)
This is the index number of the DMT sub-carrier.
The channel characteristics function is represented in linear format by a scale
factor and a complex number. This is the real part of the complex number
used in producing the channel characteristics function for this sub-carrier.
The channel characteristics function is represented in linear format by a scale
factor and a complex number. This is the imaginary part of the complex number
used in producing the channel characteristics function for this sub-carrier.
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