Logic analysis in practice

Logic analyzers are being used to a growing degree in development, testing, and servicing. Problems that may occur when adapting such instruments to the test item are examined, with particular attention given to the capacitive loading of CMOS and TTL logic families by active and passive probes. The criteria to be observed when acquiring a logic analyzer are discussed, taking into account clock rate, number of channels, memory depth, threshold setting, triggering, and data output.