HP HP 54600B, Руководство пользователя и сервисное руководство

Страница: 25 / 183

To trigger the oscilloscope
The following exercise guides you through the trigger keys, knobs, and status
line.
1
Turn the trigger Level knob and notice the changes it makes to the
display.
On the HP 54601B and HP 54602B and on an internally triggered HP 54600B
and HP 54603B, as you turn the Level knob or press a trigger menu key, for a
short time two things happen on the display. First, the trigger level is
displayed in inverse video. If the trigger is dc coupled, it is displayed as a
voltage. If the trigger is ac coupled or if LF reject was selected, it is displayed
as a percentage of the trigger range. Second, if the trigger source is turned
on, a line is displayed showing the location of the trigger level (as long as ac
coupling or low frequency reject are not selected).
2
Change the trigger setup and notice that each change affects the
status line differently.
•
Press
Source
.
A softkey menu appears on the display showing the trigger source
choices.
•
Toggle each of the softkeys and notice that each key causes the status line
to change.
•
Press
Mode
.
A softkey menu appears on the display with five trigger mode choices.
•
Toggle the
Single
and
TV
softkeys and notice that they affect the status
line differently. (You can only select TV if the trigger source is either
channel 1 or 2.)
When the oscilloscope is triggering properly, the trigger mode portion
of the status line is blank.
The Oscilloscope at a Glance
To trigger the oscilloscope
1–14