science

RCA Dimensia

RCA Dimensia is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand RCA Dimensia rather than just read about it. In short: Dimensia ( dih-MEN-see-uh) was RCA's brand name for their high-end models of television systems and their components (tuner, VCR, CD player, etc.) produced from 1984 to 1989, with variations continuing into the early 1990s, superseded by the ProScan model line. After RCA was acquired by General Electric in 1986, GE sold the RCA consumer electronics line to Thomson SA which continued the Dimensia line.

Key takeaways

RCA Dimensia belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect RCA Dimensia to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of RCA Dimensia from memory before moving on to harder problems.

Reference excerpt

Dimensia ( dih-MEN-see-uh) was RCA's brand name for their high-end models of television systems and their components (tuner, VCR, CD player, etc.) produced from 1984 to 1989, with variations continuing into the early 1990s, superseded by the ProScan model line. After RCA was acquired by General Electric in 1986, GE sold the RCA consumer electronics line to Thomson SA which continued the Dimensia line. They are significant for their wide array of advanced features and for being the first television receiver systems to feature a built in computer, somewhat of an early incarnation of a smart TV, but without internet access (see Technological convergence). In 1985, RCA released the Digital Command Component System, a fully integrated audio system that permitted the full functionality of Dimensia audio components without a Dimensia monitor. The name "Dimensia" actually dates back to the early 1970s when RCA used the term for an enhanced spatial stereo effect which they called "Dimensia IV". The tagline for the Dimensia was The Next Dimension in Sight and Sound.

Features

The RCA Dimensia systems had a wide array of high-end features that were novel for its time and are still not common anywhere.

Computer The main unique feature of the Dimensia system was the MRT 003, a 32-kilobyte built-in computer module which allowed the monitor to communicate with all Dimensia components and the remote functions. All components were connected via the control bus found on the I/O panel on the back of the TV. The control bus was a unique RCA connector which was colored black. All Dimensia branded components had this control jack and they all interconnected by using RCA plugs that could piggy-back, resulting in a daisy chain which simplified wiring. This was known as the SystemLink, a communication system that had 16 kilobytes of computer memory (after the discontinuation of the Dimensia product line, RCA reused the SystemLink term for their universal remotes).

Input/Output

One of the main features of the Dimensia's was the large input/output panel on the back. This included several RCA composite video terminals as well as multiple unbalanced and balanced RF antenna/cable inputs. This enabled easy connection of all Dimensia system components, each on their own channel. Additionally, the RCA cables were able to be connected piggy-back, resulting in daisy-chain wiring. The components were also connected to the control bus data link via the same piggy-back style RCA connectors. All Dimensia-Intelligent components could interact with the monitor's built-in computer. The first generation console Dimensia I/O panel shown to the left also has a SCART interface, an early multiport A/V interface which was popular in Europe (called EIA Multiport-Stereo Connector by RCA).

Universal Remote

The Dimensia system came with a very large and advanced universal remote, called Dimensia Intelligent Audio Video or Dimensia Digital Control, variations of the Digital Command Center. The capabilities of this remote were far more advanced than many (perhaps any) other remotes at that time. For example, with other universal remotes you can control everything separately by controlling one component at a time; one command at a time. With the Dimensia remote, just pushing the VCR button will turn on the VCR, turn on the monitor and then play the tape in the VCR, assuming there is one in the VCR. The Dimensia remote was not programmable like most universal remotes today. It was only fully compatible with Dimensia components. These components were referred to as Dimensia Intelligent, hence the name, Dimensia Intelligent Audio Video.

Television Dimensia televisions had many unique features that were state of the art at the time and some that are still rare today, including:

1984–1986 Cable-compatible Quartz tuning 26" screen greater than 350 lines of luminance resolution integral contrast enhancement filter

1987 features 27" screen Comb Filter (for better quality picture) Parental Control SAP Channel Automatic Light Sensor (measured ambient light in area around TV and adjusted picture and brightness automatically to match room brightness) Sleep Timer Two antenna inputs On-screen Time Display

VHS (1987) FS Tuner VHS Hi-Fi stereo Headphone Jack HQ VHS Picture (better than normal VHS but inferior to S-VHS) Slow Motion Timer Recording Ability to record one program while watching a different program at the same time (Dimensia only) Record both the normal stereo audio and SAP audio on the same tape

Dual Auto-Reverse Cassette Deck (1987) One-Touch Dubbing Record Mute Random Memory Play

Audio-Video Control Center (1987) Dimensia Remote Control Automatic switching between components (TV, VCR, turn table, CD, etc. Dimensia only) Manual tone controls 20-station memory

Variations There are different models of the Dimensia, and there were two "generations" of the console and full Dimensia systems.

Basic/console

This variation of the Dimensia featured just the TV monitor mounted in a heavy wood grain veneer with a large input/output panel. It was on a swivel mount. It was not as commercial as the monitor for the full component-based Dimensia system; however, it was still considered high-end and had the control bus. In other words, the console Dimensia system was intended to be more stand-alone television set than the full Dimensia system. The second generation console version of the Dimensia had the speakers located on the sides rather than underneath the screen (e.g., Model GPR2750P). It had three coaxial cable/antenna posts for separate RF inputs and one output. Audio: Since the console Dimensia monitor was intended to stand alone (the full system had a 100 or 200 watt amplifier and 3-way tower speakers), but was still a high-end system, it featured a more complete built-in audio system than most monitors of the time. It had both woofers and tweeters in the TV cabinet, whereas almost all standard CRT television sets featured just one (mono) or two (stereo) low fidelity mid-range speaker drivers. It also had selectable external speaker connectors to be powered by the internal amp.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with RCA Dimensia

Start with the simplest possible case. Write down what RCA Dimensia claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to RCA Dimensia before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about RCA Dimensia ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of RCA Dimensia

In research: RCA Dimensia appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses RCA Dimensia in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: RCA Dimensia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Products introduced in 1984, RCA brands, Television technology, so understanding it makes those chapters shorter.
In everyday life: Look for RCA Dimensia outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study RCA Dimensia in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RCA Dimensia means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain RCA Dimensia out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RCA Dimensia in simple terms?

Why does RCA Dimensia matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study RCA Dimensia?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on RCA Dimensia.