HP 54600A - Page 18

The Oscilloscope at a Glance
To trigger the oscilloscope
• Press I slope/Coupling 1.
A softkey menu appears on the display. If you selected Auto
level, Auto, Normal, or Single as a trigger mode, six softkey
choices are displayed.
If you selected TV as a trigger source, five
other softkey choices are available.
• Toggle each of the softkeys and notice which keys affect the status
line.
On the HP 54600A, external trigger is always de coupled. If you
select
ac coupling or low frequency reject, these functions do not
occur until you change the trigger source to
channel!, channel 2,
or liue.
3 Adjust the Holdoff knob and notice the change it makes to the
display.
Holdoff keeps the trigger from rearming for an amount of time that you
set with the Holdoff knob. Holdoff
is often used to stabilize the complex
waveforms. The Holdoff range is from
200.0 ns to about 13.5 s. It is
displayed, for a short time,
in inverse video near the bottom of the
display.
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