Using the Scope Functions 3
Agilent U1602B/U1604B User’s and Service Guide 47
• ECL trigger level sets the trigger level to recognize the High/Low
condition in an ETL signal automatically.
• Set to 50% trigger level sets the trigger level to the center of the
High/Low value of the waveform currently displayed. This setting
is useful when the trigger level is beyond the display.
Pulse Trigger
Pulse trigger sets the instrument to trigger on a positive or negative pulse
of a specified width. A pulse trigger occurs when a pulse is found in a
waveform that matches the pulse definition. You can set the pulse width
using the Condition function in the submenu.
To set the pulse trigger, do the following:
1 Press button at the front panel to access the Trigger type menu.
2 Press F1 to select the pulse trigger type from the pull- up list.
3 The submenu of pulse trigger is displayed concurrently after this
selection.
4 The submenu of pulse trigger includes:
•Source
Press F2 on page 1/2 to select channel source for the trigger. The
channel you select is shown in the trigger status line at the right of
the display.
• Level
Press F3 on page 1/2 to select the types of trigger level adjustment.
• Manual trigger level allows you to change the trigger level by
turning the rotary switch. The value of the trigger level is
displayed under the Level column.
• TTL trigger level sets the trigger level to recognize the High/Low
condition in a TTL signal automatically.
• ECL trigger level sets the trigger level to recognize the High/Low
condition in an ETL signal automatically.
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