ABB EDS500 Series Function Manual page 47

Functions
SQ: 5 dB
Figure 11: Interference due to different service
3 If the service is only transmitted on a section of the cable then the interference is only at
this line segment.
SQ: 7 dB
Figure 12: One-sided interference due to different service
The not yet strongly dampened transmit signal of the left side shows a lower share in
interference than the already strongly dampened transmit signal of the right side. That is why
the signal quality on the left receive side is worse than on the right side.
In this case the signal quality on the errored side is worse.
Disturbance
Source
Signal
Disturbance
Source
Signal
Figure 13: Background on one-sided interferences
1KGT151021 V000 1
Other services
Other services
Cross talk 200 mV @ 2 km
20% of the signal level
Other services
Cable length 10 km
DSL Interfaces
SQ: 5 dB
SQ: 11 dB
Result @ 8 km
20% of the signal level
Detector
SQ: 11 dB
Cross talk 200 mV @ 8 km
80% of the signal level
Detector
SQ: 7 dB
47