Fluke 990DSL, Руководство пользователя

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990DSL
Users Guide
1-2
Introduction
The 990DSL CopperPro Series II Broadband Loop Tester is a portable,
battery-operated handheld tester that is used for cable installation testing, fault
location, and digital service qualification of outside plant (OSP) paired copper
cables.
As a cable installation test tool, you can use the CopperPro with an external
multiple-pair access module in a PC-controlled mode to perform automated,
single-ended conformance testing of a newly installed cable according to
operating company guidelines. If more rigorous conformance testing is
required, you can use a second CopperPro with a multiple-pair access module
at the far end of the cable to perform precision-terminated transmission testing.
As a fault location test tool, you can use the CopperPro to precisely locate
common physical cable faults, including shorts, grounds, crosses, opens, splits,
and pair imbalances that are caused by poor splice joints. The tester can also be
used to expose corroded metallic faults on unused pairs. This type of problem,
which is virtually undetectable by conventional meters, can eventually cause a
pair to be noisy after it is cut into service.
The CopperPro is also a useful tool for helping you find t he root cause of
transmission problems, such as excessive loss and noise. Additionally, it can
detect and identify loop treatment and fault-sectionalizing devices that are
commonly installed on lines, such as range extenders (REGs), Network
Interface Devices (NIDs), and Maintenance Termination Units (MTUs).
As a digital service qualification test tool, you can use the CopperPro to verify
that a cable pair is suitable for voice frequency POTS services (such as Caller
ID and analog modem data) and for special services, such as DDS, ISDN, T1,
HDSL, HDSL2, HDSL4, ADSL, ADSL2, ADSL2+ and VDSL. The
CopperPro uses voiceband, wideband, and broadband loss, Gaussian noise,
impulse noise, and crosstalk measurements, as well as load coil detection and
location capability to qualify copper pairs for these high-speed services.