FLUKE 284-U User Manual for the Fluke 284-U Arbitrary Waveform Generator and Manager, 40 MS/s, 4 Channel

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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

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FLUKE 284-U Arbitrary Waveform Generator and Manager, 40 MS/s, 4 Channel