ZyXEL Communications IES-1248-51 Betriebsanweisung PDF herunterladen (Seite 502)

100

101

Chapter 64 ADSL Commands

IES-1248-51V User’s Guide

502

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-1248-51V 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)

i This is the index number of the DMT sub-carrier.

log(dB) This is a format for providing channel characteristics. It provides

magnitude values in a logarithmic scale. This can be used in analyzing

the physical condition of the ADSL line.

QLN(dBm) The Quiet Line Noise for a DMT sub-carrier is the rms (root mean

square) level of the noise present on the line, when no ADSL signals

are present. It is measured in dBm/Hz. The QLN can be used in

analyzing crosstalk.

SNR(dB) This is the upstream and downstream Signal-to-Noise Ratio (in dB). A

DMT sub-carrier’s SNR is the ratio between the received signal power

and the received noise power. The SNR can be used in analyzing time

dependent changes in crosstalk levels and line attenuation (such as

those caused by temperature variations and moisture).

Table 191 ToneDiag Command (continued)

LABEL DESCRIPTION

1 2 ... 497 498 499 500 501 502 503 504 505 506 507 ... 653 654

Kommentare zu diesen Handbüchern

Keine Kommentare

ZyXEL Communications IES-1248-51 Betriebsanweisung Seite 502

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung ZyXEL Communications IES-1248-51