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3151 And 3151A User Manual
Using The Instrument 3-19
PULSe:TRANsition:TRAiling?
queries the pulse fall time setting and returns a value in percent.
Selecting an
Operating Mode
The Model 3151/3151A offers four operating modes: Continuous,
Triggered, Gated and Burst. The selected waveform is repeated
continuously when the instrument is set to operate in Continuous
mode. In this mode, the Model 3151/3151A does not require a trigger
source to stimulate its output cycles. The default operating mode of
the instrument is continuous.
Triggered, Gated, and Burst modes require an external signal to
initiate output cycles. Information on how to trigger, gate and output a
burst of waveforms is given in the following paragraphs.
Triggered Mode
In Triggered mode, the output remains at a certain DC level as long
as the TRIG IN signal from the front panel remains inactive. A TTL
signal is used to stimulate the TRIG input. The generator is sensitive
to either the rising edge or the falling edge. Each time a transition at
the trigger input occurs, the Model 3151/3151A generates one
complete output waveform. At the end of the output cycle, the output
resumes position at a DC level equal to the last point of the
waveform.
The Triggered mode operates on standard waveforms and arbitrary
waveforms. Observe the limitations of the trigger signal as listed in
the specification section of this manual. Note that for Standard
Waveforms, other than square wave, the Model 3151/3151A is
limited to signal frequencies of 10 MHz or less. To place the Model
3151/3151A in Triggered mode, use the following command:
INITitiate:CONTinuous {OFF | ON}
OFF places the instrument in Triggered mode. ON restores
continuous operation.
The query:
INITitiate:CONTinuous?
queries the instrument operating mode parameter and returns "0"
(OFF) or "1" (ON).
Gated Mode
The Model 3151/3151A can be set to operate in Gated mode only
after the INIT:CONT OFF command has been received. The output
Summary of Contents for 3151
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