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– Measuring the frequency of a signal helps detect the presence of harmonic
NOTE
– Frequency is the number of cycles a signal completes each second.
– The multimeter measures the frequency of a voltage or current signal by
Rise Time
Figure 2-37
Frequency, pulse width, and duty cycle measurements
Pressing
ampere) and not the frequency range.
1 To measure frequency, rotate the switch to one of the primary functions
To obtain the best measuring results for frequency measurements, please use
NOTE
the AC measuring path.
2 Press
Keysight U1273A/U1273AX User's Guide
currents in neutral conductors and determines whether these neutral
currents are the result of unbalanced phases or non-linear loads.
Frequency is defined as 1/Period. Period is defined as the time between the
middle threshold crossings of two consecutive, like-polarity edges, as shown
in
Figure
2-37.
counting the number of times the signal crosses a threshold level within a
specified period of time.
Fall Time
+ Width
controls the input range of the primary function (voltage or
allowing frequency measurements highlighted in
. Probe the test points, and read the display.
– Width
Period
Making Measurements
Table
2-20.
2
90%
50%
10%
101
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