Technical data

ASTi ACE Studio Components Reference Guide Rev. M DOC-01-TELAS-CRG-4

2.19. Pulse Sequence

Summary: The Pulse Sequence component can generate a repeating series of up to

eight pulses of arbitrary pulse width, pulse amplitude, and timing.

Description: The Pulse Sequence is a signal component that can generate a

repeating series of up to eight pulses of arbitrary pulse width, pulse amplitude, and

timing. Typically, this signal is used to frequency or amplitude modulate other

signals.

Part (a) of the figure shows what the various parameters in the Pulse Sequence

specify. The paint count specifies the number of pulses, while the delays,

amplitudes, and durations are specified as shown.

The pulse sweep time can be modulated by an external signal. How the pulses

within the sweep act depends on whether the paint times are defined as “Fixed” or

“Fractional”.

For fixed paint times, the paint times and durations are defined in terms of the

number of microseconds after the initiation of the sweep. Modulating the sweep

time will not affect the time of the pulses, and if the sweep time cuts off a pulse it

will not be generated. Part (b) of the figure shows the same pulse sequence as part

(a), but with the sweep time shortened in fixed paint time mode.

For fractional paint times, the paint times and durations are defined in terms of the

fraction of the total sweep time. Modulating the sweep time will compress (or

extend) the pulses and move them closer together (or farther apart). Part (c) of the

figure shows the same pulse sequence as part (a), but with the sweep time shortened

in fractional paint time mode.

Figure 5: Pulse Sequence

Duration 1

Duration 2

Duration 3

Amplitude 1

Amplitude 2

Delay 1 Delay 2 Delay 3

Sweep Time

Example Shown: Paint

Count 3

(a) Signal

Sweep Time

(b) Effect on signal of sweep

modulation with fixed paint times

Sweep Time

with relative paint times