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PSI 9000 3U Series
By linking together a number of differently configured sequences, complex progressions can be created. Smart
configuration of the arbitrary generator can be used to match triangular, sine, rectangular or trapezoidal wave func
-
tions and thus, e.g. a sequence of rectangular waves with differing amplitudes or duty cycles could be produced.
Assignment to either U or I makes up to 100 sequences available for either current or voltage
but not a mix. That means that a sequence X which produces a ramp up on current cannot be
followed by sequence Y which applies a sine wave to the voltage.
Schematic diagram:
Applications and results:
t
A
Example 7
Focussing 1 cycle of 2 sequences from 100:
A sequence configured as in example 3 is run.
As the settings demand that the end offset (DC)
is higher than the start, the second sequence
run will revert to the same start level as the first,
regardless of the values achieved at the end of
the first run. This can produce a discontinuity
in the total progression (marked in red) which
may only be compensated with careful choice
of settings.
t
A
Sequence 1
Sequence 2
Example 8
Focussing 1 cycle of 2 sequences from 100:
Two sequences run consecutively. The first
generates a sine wave with increasing ampli-
tude, the second with a decreasing amplitude.
Together they produce a progression as shown
left. In order to ensure that the maximum wave
in the middle occurs only once, the first se
-
quence must end with a positive half wave and
the second start with a negative half wave as
shown in the diagram..
t
A
Sequence 1
Sequence 2
Seq. 3 Sequence 4
Example 9
Focussing 1 cycle of 4 sequences from 100:
Sequence 1: 1/4th sine wave (angle = 270°)
Sequence 2: 3 Sine waves (relationship fre
-
quency to sequence time: 1:3)
Sequence 3: Horizontal ramp (f = 0)
Sequence 4: Falling ramp (f = 0)
