5968-4632E Datasheet, PDF (50/77 Pages) Keysight Technologies – Probing Solutions for Logic Analyzers

50 | Keysight | Probing Solutions for Logic Analyzers - Data Sheet
Probing Solutions for 40-pin Logic Analyzers
Designing for Logic Analysis Probing
Keysight recommends that targets with probing constraints have connectors designed
into the prototype versions of the product for effective hardware and software debug.
The following should be considered when designing with connectors:
– Select the appropriate connector technology for your target speed and target
density.
– Carefully select all lines for routing to the connectors that may be needed for
debug.
– Group the lines at each connector for your probing convenience. For example,
Keysight may have written an inverse assembler for your device that has a
preconfigured signal order. Before designing, refer to the documentation for this
inverse assembler for essential signal lines and order.
– Keep the routing to connectors as short as possible to minimize target impact and
provide accurate data.
– Examine the impact of probing isolation networks designed into the target versus
the isolation network products offered by Keysight.
An isolation network must be located between the target and the logic analyzer. It can
be located on the target board in through-hole or SMT parts. It can also be attached to
the logic analyzer cable with the probe leads (the isolation network is molded into the
end of the probe); or the Keysight 01650-63203 isolation adapter with self contained
isolation networks can be used. Probe leads can be used with connectors but are not
the most convenient method. Direct connection of the connectors with the analyzer
cable (isolation network parts on the target) or with a probe or isolation adapter is the
faster, more convenient method.