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Measurement Functions 3M™ Dynatel™ Advanced Modular System 965AMS
DSL>DSL Noise>Application Notes
Noise can affect wideband services by taking up valuable
bandwidth and reducing speed. Symptoms of high noise can be
data errors and loss of connection. The 965AMS tester measures
longitudinal as well as metallic noise. Having high noise in
either of these tests will prompt you to look at the circuit with a
Spectrum Analyzer to identify the source.
Longitudinal Noise is a
measured between Tip [A] and
Ring [B] (shorted internally)
and the shield/ground.
Longitudinal Noise measures
inuences from outside the
cable (power induction,
AM radio or other outside
frequencies).
RED
GRN
BLK
Ring (B) 1Ring (B) 1
Ground (Earth)
Ground (Earth)
Tip (A) 1
Tip (A) 1
Shorted InternallyShorted Internally
Metallic Noise is a measured
between Tip [A] and Ring [B].
Metallic Noise measures the
active noise on a pair.
RED
BLK
Ring (A)Ring (A)
Tip (B)
Tip (B)
Both tests are performed through lters based on the service that
is selected in Setup.