Filter
Top Products
102
Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
DSL>DSL Loss>Application Notes
DSL Loss measures the signal lost from a tone transmitter
(965AMS tester, 3M
™
Dynatel
™
Far End Device (FED) or other
capable device) to the measuring 965AMS.
High loss is an indication of:
1. A loop that is too long for the potential service.
2. Bridge tap.
To get a complete picture of loss, it is recommended that you
use a FED device that will generate a sweep of frequency for the
service type. The sweep will indicate either a good circuit, high
loss or dips in the reading can be an indication of bridge tap.
The image below is a sweep that was performed with a 965AMS
tester, a 3M
™
Dynatel
™
Far End Device FED II and the selected
service was ADSL2.
Look at the before and after for these two readings. When
the bridge tap is removed then the slope no longer displays
frequency dips.
With 500 feet of bridge tap With bridge tap removed