Capacitive Loading; No Trace List Display - Agilent Technologies 1670G Series User Manual

Logic analyzers

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Capacitive loading

Excessive capacitive loading can degrade signals, resulting in incorrect

capture by the analysis probe, or system lockup in the microprocessor.

All analysis probes add additional capacitive loading, as can custom

probe fixtures you design for your application. To reduce loading,

remove as many pin protectors, extenders, and adapters as possible.

Careful layout of your target system can minimize loading problems

and result in better margins for your design. This is especially

important for systems that are running at frequencies greater than 50

If there is no trace list display, it may be that your trigger specification

is not correct for the data you want to capture, or that the trace

memory is only partially filled.

❏ Check your trigger specification to ensure that it will capture the events of

❏ Try stopping the analyzer; if the trace list is partially filled, this should

display the contents of trace memory.

Troubleshooting the Logic Analyzer

Analyzer Problems