Lecture 11 min.
Wobbulation is an ambiguous term that is used for different purposes in different cases.
For example, "Wobbulation (TV) is the swinging of the cathode-ray tube's electron beam in the direction transverse to the line, at such a frequency that during the transmission of a single picture element the beam makes one or several oscillations with an amplitude within half of the scanning pitch."
"...Wobbulation is a smooth change of the pulse repetition frequency within a certain range, used when operating under active jamming..."
Or: "One of the methods of pointing an antenna at a target is conical scanning (wobbulation) of the beam at an auxiliary frequency relative to the equisignal line, produced by mechanical rotation of the antenna or by electronic methods."
Or again: "To resolve ambiguity in both range and velocity, wobbulation of the repetition frequency can be used, which must be done slowly enough not to affect the quality of velocity selection." This comes from the field of radar, and is used to get rid of "blind speeds" in a system with MTI. The high frequency (GHz) does not change; what changes is the repetition frequency of the probing pulses, for example from .... to .... Hz and back.
"...In particular, in a CD-R the groove is not made as a perfectly even spiral, as Archimedes would have imagined it, but with microscopic deviations, called wobbulation (Fig. 5).
The frequency of the groove's oscillations relative to the spiral path is 22.05 kHz (for a disc rotation speed of 1x). Accordingly, one period of these oscillations takes up 60 µm of the spiral path. The amplitude of the oscillations is only 0.03 µm, much smaller than the width of the groove itself, but this is enough to pick out oscillations at a frequency of 22.05 kHz and to use these oscillations to synchronize the frequency of the drive's own clock generator..."
Thus, signal wobbulation is the intentional change of one or more of its characteristics according to a certain law.
The most common types of wobbulation:
Wobbulation can be used for various purposes, such as:
Depending on the purpose, wobbulation can be carried out in various ways:
Signal wobbulation is an important tool used in various fields of radio engineering, communications, and computer science.
It makes it possible to solve many tasks related to improving communication quality, protecting information, measuring parameters, and controlling signals.
In radio engineering, radio signal wobbulation means the intentional change of one or more of its characteristics according to a certain law.
The most common types of wobbulation:
Wobbulation can be used for various purposes, such as:
Depending on the purpose, wobbulation can be carried out in various ways.
Some examples:
Radio signal wobbulation is an important tool used in various fields of radio engineering.
It makes it possible to solve many tasks related to improving communication quality, protecting information, and measuring the parameters of radio systems.
For example:
In other cases, "sound wobbulation" may be used to describe an effect created by special audio tools or techniques.
For example:
It is important to note that "sound wobbulation" is not a widely used term, and its meaning may vary from person to person.
If you are unsure of the meaning, it is best to ask the person who is using it.
Here are some other terms that may be more precise for describing what you have in mind:
Motion wobbulation is a rare term, and its meaning may change depending on the context.
In some cases it may be used to describe an oscillating movement caused by uneven force or instability of a system.
For example:
In other cases, "motion wobbulation" may be used to describe an intentional change in the trajectory of movement, for example for maneuvering or avoiding obstacles.
For example:
It is important to note that "motion wobbulation" is not a widely used term, and its meaning may not be clear to everyone.
If you are unsure of the meaning, it is best to ask the person who is using it.
Here are some other terms that may be more precise for describing what you have in mind:
Color wobbulation, also known as color moiré, color interference or color banding, is a visual artifact that occurs when two or more patterns of similar color are superimposed.
Most often this happens:
Color wobbulation can be minor and barely noticeable, and in some cases it can be very noticeable and annoying.
There are several ways to reduce or eliminate color wobbulation:
Examples of color wobbulation:
Color wobbulation can be a problem in various fields, including:
It is important to understand the causes of color wobbulation and the methods of eliminating it in order to achieve the best image quality in various applications.
Wobbulation and modulation are two concepts that are often used in radio engineering and other fields related to signals.
Although they may seem similar, there are significant differences between them:
Modulation is the process of superimposing an information signal onto a carrier signal.
A carrier signal is a signal that carries information over a distance.
An information signal is a signal that contains the information itself (for example, sound, an image, or data).
In modulation, the characteristics of the carrier signal (such as amplitude, frequency, or phase) are changed in accordance with the information signal.
This makes it possible to transmit information over a distance.
Wobbulation, on the other hand, is not related to superimposing an information signal.
It is an intentional change of one or more characteristics of a signal according to a certain law.
This law may be sinusoidal, sawtooth, triangular, or random.
The purposes of wobbulation can vary:
Thus, the main difference between wobbulation and modulation is that:
In some cases, wobbulation can be used as part of the modulation process.
For example, frequency modulation (FM) uses wobbulation of the carrier signal's frequency to transmit information.
Thus, by knowing the difference between wobbulation and modulation, you can use these terms correctly and understand the operating principles of various devices and systems.
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