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Users Manual
Introduction
Triggered burst and gated modes are selected from the MODE screen, called by the
MODE key, as alternatives to the default continuous mode.
MODE:
continuous
gated setup…
triggered setup…
In triggered burst mode a defined number of cycles are generated following each trigger
event. This mode is edge triggered.
In gated mode the generator runs whenever the gating signal is true. This mode is level
sensitive.
Triggered burst mode can be controlled by either the internal trigger generator, an
external trigger input, the internally-generated trigger out signal from an adjacent channel
on a multi-channel instrument, by the front panel MAN TRIG key or by remote control.
Gated mode can be controlled by the internal trigger generator or by external trigger
input.
In both modes the start phase, i.e. the starting point on the waveform cycle, can be
specified.
Internal Trigger Generator
The period of the internal trigger generator is set with the period soft-key on the
TRIGGER IN set-up screen called by the TRIG IN key:
TRIGGER IN: force
source: internal
slope: positive
period: 2.00ms
The internal trigger generator divides down a crystal oscillator to produce a 1:1 square
wave with a period from 0·01 ms (100 kHz) to 200 s (0·005 Hz). Generator period entries
that cannot be exactly accommodated are accepted and rounded up to the nearest
available value, e.g. 0·109ms is rounded to 0·11ms.
When triggered burst or gated modes are selected the SYNC OUT source automatically
defaults to trigger which is the output of the internal trigger generator when internal
triggering or gating is specified.
In triggered burst mode the selected edge of each cycle of the trigger generator is used to
initiate a burst; the interval between bursts is therefore 0·01 ms to 200 s as set by the
generator period.
In gated mode the output of the main generator is gated on while the internal trigger
generator output is true; the duration of the gate is therefore 0·005 ms to 100 s, in step
with trigger generator periods of 0·01 ms to 200 s.
7-2
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