C
HAPTER
11
| Diagnostics
Diagnostics Test
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◆Loop Attenuation (dB) — Displays the attentuation of the link to the
ADSL Router and the service provider in decibels.
◆Signal Attenuation (dB) — Displays the signal attentuation of the
link which determines the frequency in decibels.
◆SNR Margin (dB) — Displays the signal-to-noise ratio of the link in
dedibels.
◆Attainable Rate (Kbps) — Displays the attainable rate of the link to
the service provider in kilobits per second.
◆Output Power (dBm) — Displays the output power of the unit in
decibels per milliwatt.
◆Tone Number — Displays the tone number of the ADSL signal.
(Range: 0~255)
◆H.Real — Displays the real part of channel transfer function of each
subcarrier.
◆H.Image — Displays the imaginary part of channel transfer function of
each subcarrier.
◆SNR — Displays the SNR (Singal to Noise Ratio) of each subcarrier
expressed in decibels.
◆QLN — Displays the Quite Line Noise of each subcarrier, expressed in
dBm/Hz.
◆Hlog — Displays the amplitude response of channel transfer function of
each subcarrier, expressed in decibels.
DIAGNOSTICS TEST
The diagnostic test shows the test results for the connectivity of the
physical layer and protocol layer for both LAN and WAN sides.
Figure 81: Diagnostics Test
The following items are displayed on this page: