Keysight EXG and MXG X-Series Signal Generators User’s Guide 137
Using Pulse Modulation for All Models with Options UNU, UNW, 320
Pulse Characteristics
Pulse Characteristics
When using very narrow pulses that are below the signal generator’s ALC pulse width
specification, or leveled pulses with an unusually long duty cycle, it is often useful to turn ALC off
(see
page 121).
Pulse Sour
ce
Type
Period
a
a. All delays, widths, and periods have a resolution of 10 ns.
Width & Delay
a
Uses Trigger Event
b
,
b. A signal at the rear panel pulse connector must be held high for at least 20 ns to trigger an
internally generated pulse.
Square
Internal free run pulse train with
50% duty cycle.
Determined by
user defined
rate.
⎯ ⎯
Free Run
(default)
Internal free run pulse train User Defined User Defined ⎯
Triggered Internal pulse train ⎯ User Defined
3
Adjustable
Doublet
Two internal pulse trains for each
trigger event.
⎯
User Defined:
First pulse is relative to the
rising edge of trigger signal.
Second pulse is relative to
the rising edge of first pulse.
See Figure 6-2 on
page138
3
Trigger
Doublet
Two internal pulse trains for each
trigger event.
⎯
The first pulse follows the
trigger signal.
Second pulse is user defined.
See Figure 6-3 on
page138
3
Gated Internal gated pulse train ⎯ User Defined
3
External
External pulse signal at the rear
panel Pulse connector
⎯ ⎯ ⎯
Pulse Train Internal pulse train
User Defined
User Defined:
See Figure 6-4 on
page141
3
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