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2074
User Manual
Burst Mode
3-22
Burst mode is 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 a valid trigger signal has not occurred. Each time a
trigger occurs, the 2074 generates a counted number of burst of
waveforms. At the end of the output burst, the output resumes
position at a DC level that is equal to the amplitude of the last point
of the waveform.
The instrument may be triggered from one of the following sources:
A rear panel input, designated as TRIG IN, front panel button,
marked MAN TRIG and a remote command such as *TRG. When
placed in EXT (external) trigger source, remote commands are
ignored and the instrument monitors the TRIG IN connector or the
MAN TRIG control. When in BUS, the hardware inputs are ignored
and only remote commands can trigger the instrument. The MIX is
a special trigger advance mode that senses the first remote trigger
and only then enables the hardware sources.
There are four parameters you can adjust for this mode:
Source – defines the trigger source. EXT enables the rear
panel trigger input, BUS enables remote commands and MIX
enables remote command and after the first trigger enables the
EXT source.
Slope – defines edge sensitivity for the trigger input
Level – sets the trigger level crossing point for the rear panel
TRIG IN connector. Signal transition to above the trigger level
will trigger the instrument. When the slope is set to negative,
transitions to below the trigger level will trigger the instrument.
Trigger level sensitivity and maximum level should be observed
to avoid damaging the input
Burst – Defines the number of cycles the generator will output
after a trigger signal. Each channel can be programmed to have
a unique burst counter.
Trigger Delay – defines the state of the delayed trigger
function.
Re-Trigger – defines the state of the re-trigger function
You may use the counted burst mode in conjunction with standard,
arbitrary and modulated waveforms only. Sequenced waveforms
can not be used in burst mode. The Burst run mode parameters are
shown in Figure 3-11.
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