Measurement Computing USB-2020 - Manual (Page 17)

USB-2020 User's Guide Functional Details
Each configuration is explained below:

High or low level − Trigger or gate an acquisition when an input signal is higher or lower than the specified
voltage.
 Rising or falling edge − Trigger an acquisition when input signals cross a specified voltage (rising or
falling)
 Window − Gate an acquisition when the input signal is within or outside two specified voltages (in/out of
window)
 Hysteresis − After the input signal has passed through one specified voltage, trigger an acquisition when
the input signal passes through a second voltage (positive or negative). For example, once the signal goes
below 5 V, a rising edge that crosses 4 V must occur to trigger an acquisition.
Mechanical drawing
Figure 8. USB-2020 board dimensions
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