N2640A Datasheet, PDF (5/8 Pages) Agilent(Hewlett-Packard) – Technical Data, Software Release 3.0

N2648A Alien Crosstalk Test Kits – Validation of Structured Cabling for 10GBASE-T Transmission
Real-time Spectral Analysis of
External Noise
SwiftAXT – A Scalable
Measurement Approach
Agilent’s new Sweep Interleaved
Frequency-domain Technique for Alien
Crosstalk Testing (SwiftAXT) is a
revolutionary concept inspired by the
need to test Alien Crosstalk in
10GBASE-T ready network cabling. It
radically simplifies the field verification
of structured cabling for the
deployment of 10GBASE-T. It is as
straightforward as simple, modeled
after the real network – where cable
bundles join and split, come from, and
end in different places, and have a
wide range of lengths.
Unique Alien Crosstalk Testing
Methodology
To measure Alien Crosstalk,
WireScope Pro and DualRemote Pro
are attached to the disturbed (“victim”)
cable. A pair of Alien Crosstalk
stimulators is connected to both ends
of each disturber cable. Crosstalk from
one to 32 disturber cables can be
captured simultaneously, at no
expense in measurement time. Every
stimulator pair stimulates each
frequency of interest. The coupled
Alien Crosstalk signal is received by
WireScope Pro and DualRemote Pro at
the local and at the far end of the
victim cable. Precision timing control
is the key to accurately measuring the
Alien Crosstalk in one measurement
sweep – from any number of disturber
cables, in less than 5 minutes.
A Small Tool, Yet Highly Capable
The Alien Crosstalk Stimulator is a
palm-sized signal generator. It
operates in two modes: a transmitter
producing test signals, and a termi-
nation. At all times, the device can be
commanded from its counterpart at the
other end of the disturber cable. Both
devices of a connected pair indicate
their operating mode, and fault
conditions like weak or missing power
supply, or a broken connection.
Features and Benefits
• Implements ISO/IEC 61935-1 Ed. 3
and IEEE 802.3an recommenda-
tions for Alien Crosstalk testing
• Test results on the instrument,
without post-processing
• Unparalleled speed, highly
efficient through parallel
stimulation of disturbers
• Simple, straightforward procedure
avoids operator failures
• Works with cable bundles from 2
to 12 and beyond
• Works with complex layouts such
as split and joint bundles
• Tracking mode to identify the
worst disturber cable
• Test results integrate with
ScopeData Pro II software
In addition to Alien Crosstalk, external
noise caused by high-frequency signal
sources, has the potential to disturb
transmission networks. The Wire-
Scope Pro’s external noise analysis
tool measures the received noise on a
wire pair across the frequency range of
interest, and compares its spectrum
against the receiver noise limit of
–141.9 dBm/Hz (IEEE 802.3an clause
55.5.4.4). It offers an effective way to
characterize cables in a live network
environment, by capturing the footprint
of network traffic in adjacent cables
and of other disturbing signals.
Providing objective information on the
nature and severity of noise being
picked up, it uncovers the hidden
sources of marginal network
performance.
Features and Benefits
• Displays spectral profile of
current and maximum external
noise over 10 to 500 MHz
• Compares external noise to the
–141.9 dBm/Hz receiver noise
limit (IEEE 802.3an clause 55.5.4.4)
• Characterize structured cabling in
a live environment
• Uncover the hidden sources of
temporary network degradations
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