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281, 282, 284
Users Manual
screen on which the burst count and start phase are set. The other trigger parameters are
set on the TRIGGER IN set-up screen called by pressing the TRIG IN key.
TRIGGER IN: force
source: internal
slope: positive
period: 2.00ms
Trigger Source
The trigger source can be selected with the source soft-key on the TRIGGER IN
set-up screen to be internal, external, manual or (in the case of multi-
channel instruments) either of the adjacent channels.
With internal selected the internal trigger generator is used to initiate a burst; this
generator is set up as described in the previous section.
With external selected the specified edge of the signal at TRIG IN is used to initiate
a burst.
With chan x selected (multi-channel instruments only) the trigger out signal from
adjacent channel x is used to initiate a burst; the source of the trigger out signal on that
channel x is set up as described in the previous section.
With manual selected as the source the only ways to initiate a burst are by pressing
the MAN TRIG key or sending a remote command. In multi-channel instruments,
pressing MAN TRIG will trigger all those channels for which manual has been
selected as the source.
Trigger Edge
The slope soft-key is used to select the edge (positive or negative) of the
external trigger signal used to initiate a burst. The default setting of positive
should be used for triggering by the internal trigger generator or an adjacent channel’s
trigger out.
Note that the trigger signal from SYNC OUT, used for synchronizing the display of
a triggered burst on an oscilloscope for example, is always positive-going at the start of
the burst.
Burst Count
The number of complete cycles in each burst following the trigger is set from the
TRIGGER/GATE SETUP screen, called by selecting setup… on the MODE
screen:.
TRIGGER/GATE SETUP:
burst cnt: 0000001
phase: +000.0°
(actual +000.0°)
7-4
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