Agilent Technologies DSO-X 4022A, Руководство пользователя

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Triggers
10
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 167
Adjusting the Trigger Level
You can adjust the trigger level for a selected analog channel by turning
the Trigger Level knob.
You can also adjust the trigger level using the touchscreen. See "Access the
Trigger Menu, Change the Trigger Mode, and Open the Trigger Level
Dialog"
on page 55.
You can push the Trigger Level knob to set the level of all displayed
analog channels to the waveform's 50% value. If AC coupling is used,
pushing the Trigger Level knob sets the trigger level to about 0 V.
When High and Low (dual) trigger levels are used (as with the Rise/Fall
Time and Runt triggers, for example), pushing the Level knob toggles
between high and low level adjustment.
The position of the trigger level for the analog channel is indicated by the
trigger level icon (if the analog channel is on) at the far left side of the
display. The value of the analog channel trigger level is displayed in the
upper- right corner of the display.
The trigger level for a selected digital channel is set using the threshold
menu in the Digital Channel Menu. Press the
[Digital] key on the front
panel, then press the
Thresholds
softkey to set the threshold level (TTL,
CMOS, ECL, or user defined) for the selected digital channel group. The
threshold value is displayed in the upper- right corner of the display.
The line trigger level is not adjustable. This trigger is synchronized with
the power line supplied to the oscilloscope.
Forcing a Trigger
The
[Force Trigger]
key causes a trigger (on anything) and displays the
acquisition.
T
N O T E
You can also change the trigger level of all channels by pressing [Analyze] > Features and
then selecting Trigger Levels.