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ADSL2+ Tester
To n e No [
（ d B）
Result
Analysis Item
Analysis
Actual Bit Rates
Maximum Bit Rates
Parameter
Analysis
Sub-tone
72-0046-03A
60
]：45 .94 dB
+1
-1
"
Fig 20
SNR Per Tone
Capacity
Attenuation
Noise Margin
Output Power
SNR per Tone
SNR per Tone
Hlog per Tone
Table 13: "Parameter Analysis" description
[ESC ]
+10
>>
"
results menu
Description
Displays the actual bit rate. This is the actual bit
rate between the ATU-R and ATU-C when the fast
or interleaved channel is used.
Displays the maximum attainable bit rate that the
standards support.
Indicates the Capacity. This measurement is an
indication of line capability. It is a ratio of
(achieved line rate/attainable line rate) ×100. For
example, a CPTY reading of 85% means the
modem has the capability to transmit 15% more
line rate if required.
Total attenuation is the measured difference in dB
between the power by the ATU-R and a reference
ATU-C transmit power level
Downstream:0~63.5dB, Upstream：0~31.5dB
Check to make sure the signal-to-noise margin
complies with your company's requirements. High
values can provide more room for any introduced
noise in the future.
Indicates the transmit power level expressed by
dB.
Displays the diagram of transmission character
per tone.
4 Navigating the Displays
43
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