The Model K100-D Logic Analyzer was designed to provide the utmost in performance and versatility for the digital designer and troubleshooter; i.e., it can be considered to be a true benchmark tool. It serves as both a time domain (data recorded asynchronously), and a data domain analysis tool (data recorded synchronously). The unit accepts up to 16 logic signals through its active input probes, and stores these discriminated signals in its 1024 word memory, at sample rates to 100 MHz. The Model K100-D has comprehensive recording and display analysis capabilities that enable the user to perform complex timing and state analysis of his digital systems. The unit has three distinct features that make it a useful tool for logic troubleshooting. First, the signals from the user's system are input via specially designed hybrid active probes. The input impedance of each probe is 1 MΩ , 5 pF. The probes are individual to allow spanning to physically separated points in the system, and also to provide for convenient connection at the PC board level. Signal conditioning, or threshold detection, and buffering of a particular signal is provided at a point as close as possible to the user's circuitry. The probe tip, with its accessories, allows convenient connection to a system. The probes detect logic spikes or glitches down to 5 ns regardless of clock rate used. Second, the instrument can clock at rates to 100 MHz allowing timing measurements on up to 16 signals, with a 10 ns time resolution. A relatively long memory, 1024 words, allows precise timing measurements over longer intervals of time. The performance of the active probes complement this high-speed recording capability. Third, the instrument uses a microprocessor linked to a front keyboard for instrument control. Comprehensive display prompting is used to make it easy to set up the unit for desired recording and display formats.