HP 1652B Getting Started Manual page 418

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+ Width and
+ Width (positive pulse width) and -Width (negative pulse width)
-\Nidth
measurements are made using the time (t) at the 50% level of the
Measurements
waveform edges. At least one positive-going edge followed by a
negative-going edge of the waveform must be present to make a
+ Width
measurement and at least
one
negative-going edge followed
by a positive-going edge must be present
to make a -Width
measurement. If these conditions are not present,
the + Width and/or
-Width measurements in the auto-measure field will be blank.
If the first edge on the display is rising then:
+ Width =
tfalling edge 1 - trising edge 1
-Width
= king
edge 2 - tfalling edge I
If the first edge on the display is falling then:
+ Width =
tfalling edge 2 - h-king edge 1
-Width =
king edge 1 - tfalling edge 1
HP 16528/1653B
Front-Panel Reference
3. Be sure the displayed waveform is at least one full cycle. If not,
touch TRIG key, then select s/Div. Change s/Div field to
1OOps
to display only one full cycle of the waveform. See figure 25-7.
4 Touch Display key, then select Auto-Measure. The Period and
Freq measurements displayed in the Auto-measure listing pop-up
is for the channel selected.
Waveforms Menu
25-9

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