AM stands for
VHF stands for the ____________________ frequency band.
The smallest element or part of a picture is a
What type of satellite appears to stay in one position in the sky?
QAM stands for:
SWR stands for
Which generation of cellular network technology preceded 5G?
FSK stands for:
What is the modulation index of an FM-phone signal having a maximum...
TDM stands for
HDTV stands for
It allows many signals to share a channel.
What is antenna bandwidth?
IP stands for:
FDM stands for
A technique used by codes to convert an analog signal into a digital...
Thermal noise is caused by the random motions of ____________________...
HTTP stands for:
All cell phone systems are
What are the principal frequencies that appear at the output of a...
What is the name of the Philippines first microsatellite?
What is the name of the Philippines second microsatellite?
A radio signal's ____________________ is the distance it travels...
The brain of any computer system is
PSK stands for:
Which of the following features is not currently available with...
Which of the following is often determined using a Smith chart?
When two or more signals share a common channel, it is called
A balanced load can be connected to an unbalanced cable
How does the spread spectrum technique of frequency hopping work?
A mobile operating system developed by Apple Inc. and distributed...
What is the radiation resistance of an antenna?
What is a folded dipole antenna?
Which of the following modes is used to send image data over telephone...
Unwanted ads and solicitations via email fall into the category of
EIRP stands for:
Codec stands for:
NBFM stands for:
What is the modulation index of an FM-phone signal having a maximum...
A complete communication system must include
Radio broadcasting is a familiar example of
Which of the following is a disadvantage of 5G?
CRC stands for:
What must be done to prevent standing waves on an antenna feed line?
What is microstrip?
DSP stands for:
DSL stands for:
ITU is an abbreviation for:
The 'B' in Hartley's Law stands for
"Signaling" is used to indicate:
The highest layer of the ionosphere is
Cellular radio systems divide the service area into many smaller areas...
The velocity factor of a transmission line depends on
Which of the following can be calculated using a Smith chart?
The frequency band of the FM Broadcast is:
TDM stands for:
Broadband LANs:
TEM stands for:
What are the typical characteristic impedances of coaxial cables used...
ASCII stands for:
What current flows equally on all conductors of an unshielded...
What standing wave ratio will result from the connection of a 50-ohm...
A non-optimum value for SWR will cause
TDMA stands for:
Manchester coding:
What term describes station output, taking into account all gains and...
Orbital disturbances of a geosynchronous satellite are caused by the
The more information per second you send, the ____________________ the...
Most LANs:
In which mode of PM does the peak power level of the pulses vary?
Oscillators whose frequencies are controlled by an external input...
The SC in SSB SC stands for:
FTP stands for:
A circuit that converts an instantaneous value of analog voltage into...
Which of the following is a type of private telephone system?
Which of the following indicates the relative strengths of the signal...
The part, or parts, of a sinusoidal carrier that can be modulated are
Which of the following is a Yagi antenna design variable that could be...
What is the cause of auroral activity?
When a transmitter is connected to a resistor instead of an antenna,...
What is the advantage of including parity bits in ASCII characters?
Microwave resonators are used in:
Which of the following light sources cannot be used in fiber-optic...
An antenna made up of a driven element and one or more parasitic...
What is an isotropic antenna?
The lowest-level layer in ISO OSI is called the:
Public-key encryption:
To couple a coaxial line to a parallel-wire line, it is best to use a
Shot noise is generated in
Inmarsat stands for:
The original signal being transmitted from the earth station to the...
If an AM signal is modulated with audio having frequencies up to 5...
Which is a possible polarization for an electromagnetic wave?
What standing wave ratio will result from the connection of a 50-ohm...
Which of the following is a system of delivering the TV signal to home...
Why does the radio-path horizon distance exceed the geometric horizon?
The standard that describes Ethernet-type networks is:
A transponder is a satellite equipment which
What is the wireless technique that uses thin, inexpensive tags or...
Character codes include:
What is the velocity factor of a transmission line?
The path from earth to a satellite is called the
The two basic specifications for a receiver are:
Mathematically, a spectrum is represented by a
Frame Relay:
The first geostationary satellite launched in 1965 was called
It is an umbrella term for a number of standards organizations which...
How does ARQ accomplish error correction?
A frequency-selective circuit designed to pass some frequencies and...
Which type of atmospheric structure can create a path for microwave...
The job of the carrier is to get the information through the
AGC stands for:
ADSL stands for:
What occurs when an excessive amount of signal energy reaches a mixer...
With AM which of the following conveys no information?
The difference between the upper and lower frequency limits of a...
Signals generated at frequencies above and below a carrier frequency...
The commercial name for a PAN network technology similar to Bluetooth...
The first digital code was the:
What function is performed by a Fast Fourier Transform?
What is the deviation ratio of an FM-phone signal having a maximum...
What is deviation ratio?
On networks, long messages are divided into "chunks" called:
What does the space weather term G5 mean?
The process of phase-modulating a carrier with binary data is called
How can linearly polarized Yagi antennas be used to produce circular...
An intranet connected to the Internet is often protected by:
Mathematically, the calculation of FM bandwidth requires the use of:
What is the best time of day for transequatorial propagation?
Which of these is not a pulse-modulation technique:
What type cable consists of a thin center conductor surrounded by an...
At what frequency does home microwave oven is operating?
How frequently must an analog signal be sampled by an...
The ideal standing wave ratio is
FTP is used to:
In free space, radio signals travel at approximately...
The number of layers in ISO OSI is:
VSWR stands for
A "repeater" is used to:
What are the two families of circles and arcs that make up a Smith...
What is transequatorial propagation?
What is the result of skin effect?
Basic ISDN has not been widely adopted because:
What is a use for a Wilkinson divider?
What parameter evaluates distortion of an AFSK signal caused by...
Which of the following are electromagnetic?
With mixing:
A bridge:
Overmodulation causes:
How can intermodulation interference between two repeaters occur?
Which of the following agency establishes and maintains electrical,...
What is the primary characteristic of chordal hop propagation?
The standard reference antenna for the directive gain is the
How can the output voltage of a multiple-turn receiving loop antenna...
MAN stands for:
The frequency band used for AM Broadcast is:
TCP stands for:
What do the letters FEC mean as they relate to digital operation?
Both Impatt and Trapatt devices use avalanche effect.
"IF" stands for:
Which of the following is a typical LAN configuration?
The time it takes a signal applied at one end of a transmission line...
At what time of year is sporadic E propagation most likely to occur?
The modulation index can be derived from:
Another name for an FM demodulator is
TRF stands for:
Which of the following descriptors indicates the greatest solar flare...
The optimum value for SWR is
UART stands for:
For satellite communications, ____________________ noise can be...
BISYNC:
Hollow metal conducting pipes designed to carry and constrain the...
SDLC stands for:
Which of these feed line impedances would be suitable for constructing...
ISP stands for:
Approximately how long is each side of a quad antenna driven element?
SLIC stands for:
A cordless telephone is a
UTP stands for:
In a communications system, noise is most likely to affect the signal
What is the term for spurious signals generated by the combination of...
A hub:
The five-level teletype code was invented by:
What agency is responsible for allocating bands of frequencies and for...
For best matching, the load on a cable should be
What is the effective radiated power relative to a dipole of a...
A receiver that responds to a desired signal, but not to another...
Which of the following modes can be demodulated with an envelope...
HTTP allows the use of:
What does the MDS of a receiver represent?
What would be the SWR if you feed a vertical antenna that has a 25-ohm...
A mobile operating system (OS) based on the Linux kernel and currently...
As a cell-phone user passes from one cell to another:
Which of the following techniques is normally used by low Earth...
Basic FDM groups can be combined into:
What is an advantage of having a variety of receiver IF bandwidths...
An Area Network that would extend typically across a city.
What is an effect of excessive phase noise in a receiver's local...
NIC stands for:
Interference generated by lightning, motors, automotive ignition...