3152A User Manual
Using The Instrument 3-20
Racal Instruments
©
2001
The command:
PULSe:TRANsition: TRAiling <value>
sets the pulse fall time in percent of the pulse period. For
example, if the pulse period is 100 ms, 15% fall time equals 15
ms. Pulse fall time is measured between the two turning points
of the second transition.
The query:
PULSe:TRANsition:TRAiling?
queries the pulse fall time setting and returns a value in percent.
Selecting an
Operating Mode
The Model 3152A 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 3152A 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
synthesizer is sensitive to either the rising edge or the falling
edge. Each time a transition at the trigger input occurs, the
Model 3152A 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 3152A
is limited to signal frequencies of 10 MHz or less. To place the
Model 3152A in Triggered mode, use the following command:
INITitiate:CONTinuous {OFF | ON}