Product Manual

281, 282, 284
Users Manual
channel’s TRIGGER IN screen. Select the channel to start the sequence with the
appropriate
SETUP key, select the TRIGGER IN screen with the TRIG IN key and
press the
force soft-key.
Gated Mode
Gated mode is turned on with the gated soft-key on the MODE screen. The
setup…
soft-key on this screen accesses the TRIGGER/GATE SETUP screen on
which the start phase is set. The other parameters associated with gated mode 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
Gate Source
The gate signal source can be selected with the source soft-key on the
TRIGGER IN
set-up screen to be internal, external, or (in the case of a multi-
channel instrument) an adjacent channel.
With
internal selected the internal trigger generator is used to gate the waveform;
the duration of the gate is half the generator period. Refer to the section on the Internal
Trigger Generator above for more information.
With
external selected the gate duration is from the point (nominally +1.5 V) on the
specified edge of the signal at the
TRIG IN socket until the same level on the opposite
edge.
With
chan x selected the trigger out signal from the adjacent channel x is used to gate
the waveform; the source of the trigger out signal on that channel x is set up as described
in the previous section.
Gate Polarity
If slope on the TRIGGER IN set-up screen is set to positive the gate will
open at the threshold on the rising edge and close on the threshold of the falling edge of
an external gating signal. In other words the gate signal is true when the
TRIG IN signal
is high. If the
slope is set negative the gate signal is true when the TRIG IN
signal is low. The default setting of positive should be used for gating with the
internal trigger generator or an adjacent channel’s trigger out.
Start Phase
Press
setup… on the MODE screen to access the TRIGGER/GATE SETUP screen
on which the start phase can be set.
TRIGGER/GATE SETUP:
burst cnt: 0000001
phase: +000.0°
(actual +000.0°)
7-6