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                       Pattern Generator Optional for LA-5000 Series Logic Analyzer

                                                             General Overview

The Pattern generator option is a Voltage adjustable level digital word generator. suitable for 1.5V to 4.5V logic

family (Type II ), This option can be purchased together with the Logic Analyzer, or added later. Channel widths

are available up to the maximum number of channels of the Logic Analyzer.

For the LA-52xx series & LA-55xx series, channels are added in sets of 16, 16, and then 8 channels for each group of 40 channels. This repeats for the second, third and fourth sets of 40 channels. Memory depth and data

output rates depend upon the model of the host Logic Analyzer.

                        Note : that for clock generation purposes, the maximum clock rate is half that of the

                                    maximum data output rate.

                                                                   The Hardware

The Pattern Generation is completely integrated with the Logic Analyzer. The two operate from the same

clock source, whether the internal clock or the external clock.

Patterns can loop continuously, loop until the Logic Analyzer triggers, or once on the user's command.

Allocation of channels between the Logic Analyzer and the Pattern Generation is in groups of sixteen

channels. Channels can be all logic analysis, all pattern generation, or any multiple of sixteen for pattern generation with the remaining channels as logic analysis.

To select the configuration, simply change the mode in the software, and connect the appropriate pods. the Pattern Generator Option consists of several components. First is additional circuitry that is added internally

to the Logic Analyzer. Once added, pattern generation up to the maximum number of channels of the Logic Analyzer is supported, limited only by the number of pods. The second are the pattern generator output pods, each supporting eight outputs. These are purchased in multiples of two pods (16 channels) at a time.

Physically, they are similar to the logic analyzer pods, a small box with active circuitry. A ribbon cable on one

end connects to the analyzer box. A row of standard square header pins (0.20 inch spacing) at the other end provides connection points to the circuit under test. The last parts are the modular clips and wires, the same

as those included with the logic analyzer.

The clips are the spring loaded, double opposing hook type. The 10 inch wires have female connectors at

each end that fit over the pins of the pattern pod, the receptacle pin of the clip or any 0.025" post.

For the LA-52xx & LA-55xx series, no internal circuitry needs to be added, and the unit does not need to be returned to "Clock". Just order the pods as needed, in multiples of two pods (16 channels) at a time or as a single pod for the last 8 of 40 channels on the LA-52xx & LA-55xx series, Pods and wires/clips are the same

as above.

                                                                    The Software

The pattern generator option is integrated into the same software control program as the Logic Analyzer.

The software is a menu based, easy to use DOS application. An on screen dialog box setups both the

allocation of channels (for logic analysis verses pattern generation) and selection of the pattern output mode.

The data for the pattern generator can be input in three ways. The behavior of a live circuit can be captured

by the Logic Analyzer, saved to a file, and then used as the output pattern. Data can also be input directly

into the program, in either binary or hex, by using the on-screen editor.

Lastly, data can be input directly into a file by some other software, and then loaded in as an output pattern.

Any combination of the three methods is also possible. All patterns can be saved to disk for future use.

Technical specifications subject to change without notice. Software updates free via our Website.