Vertical Reference Plane Changes * Nets Crossing Gaps * Net Near Plane Edge * Filter Placement * ICs Over Split Planes * 10 Coupling * Edge Rate * Edge Rate to Period * Exposed Length * Metal Island * Edge Shield * Long Nets * Termination Check * Long Stub * Many Vias * Guard Trace * Diff Pair * Decoupling Cap Placement * Power/Ground Width * Impedance * Differential Impedance * Crosstalk Coupling
Alien crosstalk coupling
occurs with respect to both the near end and far end of the installed cabling system.
Topics to be studied include: antennas, the grounding myth, partial and incomplete inductance, intentional and unintentional signals, critical signals, common-mode and differential-mode emissions, crosstalk coupling
, multilevel/cascade crosstalk, guard traces vs.
Beyond space savings, users are finding that F/UTP provides increased reliability in retrofit situations, where it eliminates the very-real potential for excessive alien crosstalk coupling
between non-augmented cat 6 and cat 6A UTP cables running 10GBASE-T within the same pathway.
BoardSim Crosstalk automatically searches entire boards and builds models for regions where crosstalk coupling
between traces can exceed user-defined limits.
The Nautilus family of products offers parasitic extraction, RC reduction, delay calculation, crosstalk coupling
noise, IR drop (voltage), and electromigration (EM) analysis.
FIGURE 11 shows an estimate of the crosstalk coupling for single-ended traces as a function of separation for a typical set of PCB dimensions.
FIGURE 12 shows an estimate of the crosstalk coupling as a function of separation for a typical set of PCB dimensions.
Alien crosstalk is the exact same phenomenon but the crosstalk coupling
now occurs between wire pairs in different, adjacent cabling links.
These features both increase and randomize the distance between a cable and its neighboring cables, resulting in greatly improved Alien crosstalk coupling
and Return Loss channel characteristics.
The information required to accurately predict the significance of certain types of ALSR crosstalk coupling
is not trivial.
RouteSpecialist models board construction, driver/receiver characteristics and wiring, and generates crosstalk coupling
and transmission-line delay rules for SPECCTRA AutoRoute.