Agilent Technologies 6000 Series User Manual page 188

5 Making Measurements
188
Frequency
Frequency is defined as 1/Period. Period is defined as the time
between the middle threshold crossings of two consecutive,
like-polarity edges. A middle threshold crossing must also travel
through the lower and upper threshold levels which eliminates
runt pulses. The X cursors show what portion of the waveform
is being measured. The Y cursor shows the middle threshold
point.
To isolate an event for frequency measurement
figure shows how to use delayed sweep to isolate an event for a
frequency measurement. If the measurement is not possible in
the delayed time base mode, then the main time base is used. If
the waveform is clipped, it may not be possible to make the
measurement.
Table 11 Isolating event for Frequency measurement
Period
Period is the time period of the complete waveform cycle. The
time is measured between the middle threshold points of two
consecutive, like-polarity edges. A middle threshold crossing
must also travel through the lower and upper threshold levels
The following
6000 Series Oscilloscope User's Guide