The Beginnings
Used to transform words into numbers
What is ASCII (American Standard Code for Information Interchange)?
The number of waves that pass a fixed point in unit time
What is frequency?
Name one reason why AM can be used over FM
- Cheaper
- Can be transmitted over long distances
- Lower bandwidth --> more stations available
The full form of FM
What is frequency modulation?
Stores electric fields and acts similar to a battery
The first long-distance communication system that required two or more machines connected by wires
What is the telegraph?
Measured in volts/meter and related to voltage
What is the electric field
This affects the amplitude and is a cause for why AM is not the preferred choice
What is "noise"/interference?
Name one reason why FM can be used over AM
- High bandwidth --> Better sound quality
- Has very little to no static
Stores magnetic fields and is commonly a coil
What is an inductor?
A type of source code that uses the frequency of a letter to optimize transmission
What is the Huffman Code?
Measured in Tesla and related to current
What is the magnetic field?
Fun Fact: The Earth's magnetic field is 50E-6 Tesla while a refrigerator magnet is 0.1 Tesla
This is what changes between the message signal and modulated signal
What is the amplitude/height?
This is what changes between the message signal and modulated signal
What is frequency/length?
Also known as a "carrier wave"
What is radio frequency?
An early type of signal that was either "on" or "off" and a type of this was used only at night
What is a smoke/flare signal?
This instrument resists the flow of electricity
What is a resistor?
The sinoid function's parent equation for AM
Asin(ωt)
A --> Amplitude ("height")
ω --> Frequency
t --> Time
The inventor of FM broadcasting
Who is Edwin Howard Armstrong?
Needed to convey information via radio waves
What is modulation?
The earliest form of communication known to mankind that is used even today
What is verbal communication?
Measured in ohms
What is electricity?
The full form of AM
What is amplitude modulation?
Name three things you took away from this SMART Cycle
...
A type of wave with two components perpendicular to each other
What is an electromagnetic wave?