The K20 Logic Analyzer System consists of the K20 Logic Analyzer unit, the Timing Analysis Data Probe and the general purpose State Mode Data Probe. The general purpose State Mode Probe offers 24 bits of data input with an advanced clocking capability and a substantial triggering capability for most microprocessor and bus configurations (both 8 and 16 bits). The Timing Mode Probe offers complex triggering, sampling rates to 100 MHz, glitch detection, extremely deep sample memory and sufficient channels for most jobs, all as standard features. Because of its considerable sample memory depth, the K20 has a new feature not previously found in logic analyzers: Accelerating Rate Scrolling (ARS). ARS allows scrolling through memory to be slow and precise, or fast, to move to another point quickly. The rate accelerates as the scrolling switch continues to be pressed. Releasing the switch momentarily causes a return to the slower rate. None of the data are missed during scrolling. The K20 also offers "Help" messages to lessen reliance on the User's Manual. The K20 has virtually no limit in terms of expansion and the addition of software. The base analyzer unit contains the software required to run the standard data probes and help messages. Other probes come with software and expanded hardware capabilities within the Probe. There is never a need to open the main unit to add an option. The K20 Series analyzers which are small and lightweight, offer a high performance/price ratio. There are only a few, simple menus. Specific Menus for specialized probes are included with the software within the Probe.