science

Signal/One

Signal/One 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 Signal/One rather than just read about it. In short: Signal/One was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, United States.

Key takeaways

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

Reference excerpt

Signal/One was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, United States.

History Signal/One's parent company was Electronic Communications, Inc. (ECI), a military division of NCR Corporation located in St. Petersburg, Florida. Key Signal/One executives were general manager Dick Ehrhorn (amateur radio call sign W4ETO), and project engineer Don Fowler (W4YET). Beginning in the 1960s with the Signal/One CX7, ("S1", as they were called) the company made radios that were priced well above the competition and offered many advanced features for the time, such as passband tuning, broadband transmission, dual receive, built-in IAMBIC keyer, electronic digital read out, solid state design, QSK and RF clipping. A Signal/One radio was said to be a complete high performance, station in a box. While marketed to the affluent radio amateur, it has been suggested that the primary market for Signal/One, like Collins, was military, State Department, and government communications. Although prized for the performance and advanced engineering, Signal/One's products did not sell as well as hoped, and the company gradually fell on hard times. From the 1970s though the 1990s, every few years, Signal/One was spun off, sold, and resurfaced at another location.

Collectors The surviving Signal/One products are sought after and actively collected. These include the CX7, CX7A, CX7B, CX11 and Milspec models. The last Signal/One radio was a re-engineered ICOM IC-781. Information available indicates there were 1152 Signal Ones built: 850 CX7, 112 CX11, 168 MS1030 (number of "C" versions is not known), 6 MilSpec1030C, 15 MilSpec1030CI Icom IC-781 conversions and 1 Milspec1030E DSP Icom IC-756 Pro conversion.

See also Collins Radio Icom Vintage amateur radio

References

Illustrations

Worked examples

Example 1 — a first encounter with Signal/One

Start with the simplest possible case. Write down what Signal/One 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 Signal/One 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 Signal/One 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 Signal/One

In research: Signal/One 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 Signal/One 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: Signal/One is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amateur radio companies, Defunct electronics companies of the United States, Defunct manufacturing companies of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Signal/One 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 Signal/One in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Signal/One 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 Signal/One out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Signal/One in simple terms?

Signal/One was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, United States.

Why does Signal/One 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 Signal/One?

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 Signal/One.