Quiz 2 Questions Flashcards
Three currently popular modulation techniques for encoding digital data and transmitting it over analog signals are amplitude shift keying, frequency shift keying, and……….. shift keying
phase
The simplest modulation technique is………. shift keying.
amplitude
………. shift keying incorporates four different phase angles, each of which represents 2 bits.
Quadrature phase
……….. are represented as continuous waveforms that can be at an infinite number of points between some gives minimum and maximum.
Analog signals
………… shift Keying represents 0s and 1s by different changes in the phase of a waveform.
Phase
Frequency shift keying is subject to……….
intermodulation distortion
The ……… is the main connecting cable that runs from one end of the installation to another.
backbone
when a light signal passes from the core of the cable into the surroundings material, this is called………
refraction
The second-generation PCs cellphone technology used both GSM and ……… technology.
Code Division Multiple Access (CDMA)
……….. satellites are found 22,300 miles from the Earth and are always positioned over the same point on Earth.
GEO
the two most common application areas of terrestrial microwave are …….. and business intercommunication
Telephone communications
A technique called ………….,which allows only one terminal to transit at one time, successfully controls multiple terminals that share a connection to a mainframe computer.
polling
A date code is aset of all textual characters or symbols and their corresponding ……… patterns
binary
Amplitude modulation is susceptible to sudden …………
noise impulses
Intermodulation distortion is caused when the frequencies of 2 or more signals mix together and create new frequencies.
True
False
True
