User`s guide

3-21

Triggering the Oscilloscope

To use Duration triggering

Duration trigger lets you define a pattern, then trigger on a specified time

duration of this logical AND combination of the channels.

1Press the More key in the Trigger section of the front panel, rotate the

Entry knob until

Duration is displayed in the Trigger softkey, then press

the

Settings softkey to display the Duration trigger menu.

2 For each analog or digital channel you want to include in the desired

pattern, press the

Channel softkey to select the channel.

This is the channel source for the H, L, or X condition. As you press the Channel

softkey (or rotate the Entry knob on mixed-signal oscilloscopes), the channel

you select is highlighted in the Pattern = line directly above the softkeys and

in the upper-right corner of the display next to "Dur". External trigger may also

be specified as a channel in the pattern when using the 2-channel and 4-channel

oscilloscopes.

Adjust the trigger level for the selected analog channel by turning the Trigger

Level knob. The position of the trigger level for the analog channel is indicated

by the trigger level icon at the far left side of the display when DC coupling

is selected Set the threshold for the selected digital channel group by pressing

the D7 Thru D0 or D15 Thru D8 key then press the Threshold softkey. The value

of the trigger level or digital threshold is displayed in the upper-right corner of

the display.

Trigger level

or threshold

Selected

channel

Duration

trigger

Channel

select

Logic level

Return to

previous menu

Qualifier

Qualifier time set