Brochure
Application Note
www.tektronix.com/tbs1000b4
Using the TBS1000B’s enhanced limit testing allows you
to take advantage of its dual reference waveform template
option.
Begin by connecting a TP0101 passive probe from CH1 of the
power supply to CH1 of the TBS1102B oscilloscope. Then
follow these steps:
1. Build the first boundary. Press Output on the power
supply to turn the output on. Set the output voltage to 5V,
and the Slew Fall rate to 65V/s (this value can be adjusted
to meet the 50ms fall time).
2. On the oscilloscope, push Default Setup and Autoset to
trigger a stable waveform on the display. Push Trigger
Menu. Choose the following settings: “Edge” as the
trigger type, “CH1” as the trigger source, “Falling” for
slope, and “Normal” for mode. Rotate the “Vertical
Position” knob to move the waveform above the center
of the grid and set the “Vertical Scale” knob to 1V/div.
Move the trigger level to the center grid line (see Figure 4).
3. Press Output on the power supply to turn the output off.
The scope will trigger at the falling edge of the power
supply signal. On the oscilloscope, press Measure to
confirm the waveform characteristics. In the measurement
sub-menu of CH1, select “Fall Time” and “Peak-Peak”.
Note the fall time is about 50ms (see Figure 5).
Figure 4. Trigger set-up. Figure 5. 50ms falling edge becomes the first boundary.