Teledyne LeCroy WaveRunner XI SERIES Operator’s Manual - Manual (Page 57)

O
PERATOR
’
S
M
ANUAL
Refer to Acquisition Modes in the specifications for maximum sample rates.
Combining Channels
1. In the menu bar, touch Timebase, then Horizontal Setup... in the drop-down menu.
2. Under “Active Channels,” touch 4, 2, or Auto. The maximum sample rate is shown alongside each button.
Autosetup
When channels are turned on, Autosetup operates only on those turned-on channels. If no channels are turned
on, all channels are affected. When more than one channel is turned on, the first channel in numerical order with
a signal applied to it is automatically set up for edge triggering.
You can perform an autosetup of all these functions together by simply pressing on the front panel, or by
touching Autosetup in the Vertical, Timebase, or Trigger drop-down menu.
TRIGGERING
Trigger Setup Considerations
Trigger Modes
• Auto mode causes the oscilloscope to sweep even without a trigger. An internal timer triggers the sweep so
that the display remains, even when the signal does not cause a trigger.
• In Normal mode, the oscilloscope sweeps only if the input signal reaches the set trigger point. Otherwise it
continues to display the last acquired waveform.
• In Single mode, only one sweep occurs each time you press the button.
• Stop mode inhibits all sweeps until you select one of the other three modes.
Trigger Types
The triggers available to you are defined as follows:
Edge A simple trigger, Edge trigger is activated by basic waveform features or conditions such as positive
or negative slope, and holdoff.
Width Width trigger allows you to define a positive- or negative-going pulse width bounded by a voltage
level, above or below which a trigger will occur. Or you can specify a pulse width and voltage range,
within or outside of which a trigger will occur.
Glitch Glitch trigger is a simpler form of Width trigger. Use Glitch trigger when you want to define a fixed
pulse-width time or time range only. Glitch trigger makes no provision for voltage levels or ranges.
Interval While Glitch trigger performs over the width of a pulse, Interval trigger performs over the width of an
interval - the signal duration (the period) separating two consecutive edges of the same polarity:
positive to positive or negative to negative. Use interval trigger to capture intervals that fall short of,
or exceed, a given time limit. In addition, you can define a width range to capture any interval that is
itself inside or outside the specified range - an Exclusion trigger by interval.
Qualified The Qualified (A-B) trigger allows arming of the trigger on Event A and triggering on Event B. If the
arming event is a Pattern that occurs once (Pattern) or that occurs and stays satisfied (PatState), the
triggering event can be an Edge, Width, Glitch, or Interval condition.
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