Tektronix Keithley DMM7510 User Manual page 87

Section 10: Capturing and analyzing waveforms
For this test, you will:
•
Connect the 3 Ω load resistor to the output terminals of the buck converter
•
Connect one test lead to the switch node voltage of the buck converter
•
Connect another test lead to the ground of the buck converter
•
Supply 12 V of input voltage to the input terminals of the buck converter
•
Reset the instrument
•
Select the digitize voltage function and set sample rate to 1 megasample per second with a
sample count of 100
•
View the data on the Graph screen
•
Turn on vertical horizontal cursors to calculate the duty cycle percentage
Device connections
The connections for the duty cycle test are shown in the figure below.
10-8
Figure 39: Duty cycle device connections
Model DMM7510 7½ Digit Multimeter User's Manual
DMM7510-900-01 Rev. C / September 2019