Block 5 Flashcards
Divided into 360 degrees
Sine Wave
of cycles occur in a second
Frequency
Physical Length; Used in determining antenna size
Wavelength
Continuous and variable electrical wave that represents an infinite #
Analog
Amount of signal strength
Greater height greater value
Amplitude
Audio Frequency Range
400Hz- 15000Hz
Radio Frequency range
20 kHz to 300 GHz
Constant amplitude and frequencies
Carrier wave
Lower frequency that contains info.
AKA Audio
Intelligence Wave
Process of combining 2 or more inputs in a nonlinear device
Heterodyning
Current through is not proportional to applied voltage
Non Linear Device
Process of which the amplitude or frequency of a carrier wave is varied in accordance with the intelligence wave
Modulation
4 Basic Req of Modulation
Reference signal
Modulating signal
Non linear device
Filter
Instantaneous amplitude of the carrier is varied according to the instantaneous amplitude/frequency of the intelligence
Amplitude Modulation
The frequencies or space the carrier and the significant side bands occupy in the frequency spectrum
Bandwidth
Form of amplitude modulation where carrier and one side band is eliminated
Single Sideband
Frequency of the carrier signal deviates in proportion to the amplitude or frequency of the modulating signal
Frequency Modulation
Centers around using a method of manipulating a short duration pulses in direct relation to the intelligence
Pulse modulation
Duration of time (Pulse Modulation)
Pulse Width
Transmitter is not transmitting (Pulse Modulation)
Rest Time
Total time of one complete cycle (Pulse Modulation)
Pulse Repetition time
The rate in Pulses (Pulse Modulation)
Pulse Repetition Frequency
Max Power (Pulse Modulation)
Power Peak
Peak power averaged (Pulse Modulation)
Average Power
