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Features and Functions 2
U2761A User’s Guide 85
Triggering
Applies to sweep only. You can issue triggers for sweeps
using Internal (immediate) triggering, External triggering, or
Manual (software) triggering.
• Internal triggering is enabled when you turn on the
U2761A. In this mode, the U2761A outputs continuously
when the sweep mode is selected.
• External triggering uses the device Trig In connector to
control the sweep. The U2761A initiates one sweep each
time Trig In receives a TTL pulse. You can select whether
the U2761A is triggered on the rising or falling edge of
the External trigger signal.
• Manual triggering initiates one sweep each time you click
Trigger on the soft front panel.
Trigger Source Choices
You must specify the source from which the U2761A accepts
a trigger.
• The sweep trigger source consists of Internal, External, or
Manual. The default trigger source is Internal.
• The U2761A accepts a Manual trigger, a hardware trigger
from the device Trig In connector, or continuously output
sweeps using an Internal trigger. At power-on, Internal
trigger is selected.
• The trigger source setting is stored in volatile memory
where the source is set to Internal (immediate) trigger
upon power-off or after a remote interface reset.
Soft Front Panel Operation
On the Trigger Setup panel as shown in Figure 2-28, select
the desired trigger source from the drop down list
at the Source panel.