22 Copper tests
298
ARGUS 152
Line scope status display
The line scope can identify a variety of
states or occurrences on the line.
This example shows the ADSL (Annex B)
connection with ISDN-U interface estab-
lished between the modem and DSLAM.
The line scope is located in direct proxim-
ity to the modem, as it is particularly effec-
tive upstream in the spectrum.
If the upstream were significantly less than
the downstream, it would be in direct prox-
imity to DSLAM.
<Menu>
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 hand-
shake 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).
Connection example without probe:
Opens the graph function, see
page 300
