ZyXEL Communications IES-1248-51, Руководство пользователя

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IES-1248-51 User’s Guide
332 Chapter 49 ADSL Commands
The following example displays the tone diagnostics results for ADSL port 8.
The following table lists the tone diagnostic parameters. See the ITU-T’s G.992.3 for more
information.
Figure 222 Tone Diagnostics Command Example
ras> ad lined toneD 1
port: 1
number_of_subcarries: 512 32
latn: 24.1 2.7
satn: 24.1 61.3
snrm: 30.2 25.0
attndr: 28008000 1248000
farEndActatp: -31.0 11.9
i log(dB) QLN(dBm) SNR(dB)
0 N/A N/A N/A
1 N/A N/A N/A
2 N/A N/A N/A
3 N/A N/A N/A
4 N/A N/A N/A
5 N/A N/A N/A
6 -21.1 -125.5 17.5
7 -15.3 -124.0 26.0
8 -9.9 -123.0 31.0
9 -5.7 -120.5 38.0
----------------------Snip------------------------
509 6.0 -124.0 29.0
510 6.0 -124.0 29.0
511 6.0 -123.0 26.5
Table 80 ToneDiag Command
LABEL DESCRIPTION
number_of_
subcarries
Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-
carriers (sub-channels) of 4.3125 KHz each.
This number indicates how many upstream and downstream DMT sub-carriers
the ADSL connection is using.
hlinScale:
The channel characteristics function is represented in linear format by a scale
factor and a complex number. This is the maximum upstream and downstream
scale factor used in producing the channel characteristics function.
latn:
This is the upstream and downstream Line Attenuation (in dB).
satn:
This is the upstream and downstream Signal Attenuation (in dB).
snrm:
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 IES-1248-51 still being able to
meet its transmission targets.
attndr:
This is the upstream and downstream Attainable Net Data Rate (in bit/s).
farEndActatp:
This is the upstream and downstream Far End Actual Aggregate Transmit
Power (in dBm)