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User Manual 301/302

Gated Mode

The Model 301/302 can be set to operate in Gated mode only after the

INIT:CONT OFF command has been received. The output remains at

a DC level as long as the front-panel TRIG IN signal remains inactive.

The gating signal can be programmed to be either active high or

active low. As long as the proper level is present at the trigger input

connector, the Model 301/302 generates output waveforms. When the

gate signal is de-asserted, the output completes the last cycle and

resumes position at a DC level equal to the last point of the waveform.

Gated mode operates on standard waveforms, arbitrary waveforms,

and on sequences of waveforms. Observe the limitations of the gating

signal as listed in the specification section of this manual. To place the

Model 301/302 in Gated mode, use the following commands:

INIT:CONT OFF

TRIGger:GATE {OFF | ON}

The default state for the Gated mode is OFF. Turning Gated mode

ON automatically turns Burst mode off.

The query:

TRIGger:GATE?

queries the gate state and returns "0" (OFF) or "1" (ON).

In WaveWiz, select gated mode by clicking the diamond shaped

Gated button under mode on the Trigger tab. (see Figure 3.12 above).

Burst Mode

Burst mode is very similar to Triggered mode with the exception that

only one trigger signal is needed to generate a counted number of

output waveforms. In Burst mode, the output remains at a DC level as

long as the TRIG IN signal from the front panel remains inactive. The

trigger input is sensitive to either the rising edge or the falling edge.

Each time a transition at the trigger input occurs, the Model 301/302

generates the number of complete output cycles that have been

programmed in the burst count parameter. At the end of the burst, the

output resumes position at a DC level equal to the last point of the

waveform. The burst count is programmable from 1 to 1Meg. The

default burst value is 1.

Burst mode operates in standard waveforms and arbitrary waveforms

only. Note that the Model 301/302 cannot operate in Sequence and

Burst modes simultaneously. Observe the limitations of the trigger

signal as listed in the specification section of this manual. To place the

Model 301/302 in Burst mode, use the following commands:

INITitiate:CONTinuous OFF

Configuring the Instrument

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Wavetek 39A Spezifikationen Seite 48