Keysight U1281A Guide De L'utilisateur page 92

2 Making Measurements
Measuring pulse width
The pulse width function measures the amount of time a signal is high or low, as shown in
NOTE
Figure 2-32. It is the time from the middle threshold of the rising edge to the middle
threshold of the next falling edge. The measured waveform must be periodic; its pattern
must repeat at equal time intervals.
1 To measure pulse width, position the rotary switch to one of the functions allowing
frequency measurements shown in Table 2-15.
2 Press
test points and read the display.
Figure 2-33
The pulse width of the input signal is shown in the primary display. The voltage or ampere
value of the signal is shown in the secondary display. The bar graph does not indicate pulse
width but indicates the voltage or ampere value of the input signal.
The pulse width polarity is displayed to the left of the pulse width value.
positive pulse width and
measured, press and hold
Press
Press
than 1 second to exit the frequency measurement function.
92
until the measurements are shown in the millisecond (ms) unit. Probe the
Hz
Save
Pulse width display
indicates a negative pulse width. To change the polarity being
to scroll through the frequency, pulse width, and duty cycle measurements.
Hz
Save
to scroll back to the frequency measurement mode, and hold
Hz
Save
for more than 1 second.
indicates a
for more
Keysight U1281A/U1282A User's Guide