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3 Copper tests
3.2
Copper tests Oscilloscope
3.2.1 Line Scope
With the line scope, ARGUS performs a real-time analysis on the connected line. The high-
ohm line scope can e.g. be patched into an existing link between modem and DSLAM.
You can display the results in either the time or frequency range (FFT).
The voltage on the line may not exceed 200 V DC or 100 V
AC.
pp
The line scope can identify a variety of states or occurrences on the line. This example
shows the VDSL connection established between the modem and DSLAM.
Finding the modem:
In addition to the general state of the line/connection, a variety of events can be detected.
In this example, we can see the handshake tones that a modem connected to the line
sends periodically in order to establish a connection with the DSLAM. This also reveals
whether or not an active modem is connected to the other end of the line.
In addition to the wanted signals such as the DSL spectrum or the handshake tones, the
line scope can also detect unwanted signals such as temporary interference sources (real-
time operation) or peculiarities in noise (with respect to background noise).
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ARGUS Copper Test Manual
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