User Manual

Teledyne LeCroy
Digital Channel Setup in WaveSurfer 3000 Oscilloscopes
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On the right side of the Digital Channels dialog are controls to adjust the Vertical Position and Group Height. The
Vertical Position determines the relative position of the digital signals on the screen. A value of 4.00 divisions will
position the top of the top-most trace in the Digital Group very near to the top of the display. Group Height simply
determines how many vertical divisions the Digital Group consumes on the display. Both settings may be done
using the front-panel Vertical control knobs.
On the left in the View section, check the Group box to display digital lines. Below that, the Display Mode menu
permits a choice of displaying Lines, Bus, or Lines & Bus. The Labels button permits selection of channel names
by Data, Address, or Custom. Under each channel check box is a name box; these permit easy swapping of
channel names. The Custom labels may be used to give each channel a completely custom name. The Display
D0-D7 and D8-D15 shortcut button is available to quickly turn multiple channels on or off at the same time.
Color-coded tabs at the top left of the Digital Channel setup dialog allow the digital input channels to be specified
in two groups labeled Digital1 and Digital2. Any given channel can be in any of the groups at the same time,
allowing users to set up differing groupings of the same input channels for measurement and/or analysis.
The Logic Setup tab (Figure 2) permits selection of seven standard logic families (TTL, ECL, CMOS 5V, CMOS
3.3V, CMOS 2.5V, PECL 5V, LVDS, and user defined). There, users select thresholds settings if applicable.
Figure 2: The Logic Setup tab allows selection of logic families,
thresholds, and hysteresis values.
Conclusion
Teledyne LeCroy’s WaveSurfer 3000 oscilloscopes provide a powerful and highly flexible user interface for
display and organization of digital input channels. The interface lends an intuitive feel to the debugging of digital
designs.