MTN COMM QUESTIONS WITH 100%RATED
ANSWERS 2024/2025 LATEST UPDATED/GET A+
Omni-directional - Radiates and receives radio waves in ALL directions.
Uni-directional - Radiates and receives radio waves in ONLY ONE direction.
Bi-directional - Radiates and receives radio waves in TWO directions.
Diffraction - The process by which electromagnetic waves are bent so that they appear behind an
obstruction.
Directivity - The property of radiating more energy in some directions than in others.
Gain - The increase in signal strength that is produced by an amplifier.
Impedance - The measure of how difficult it is for current to flow through a conductor.
Noise - Random pulses of electromagnetic energy generated by lightning or electrical equipment.
Reflection - The turning back of a radio wave from an object or the surface of the earth.
Refraction - The bending, or changing direction, of a radio wave passing into or through layers
of the atmosphere or the ionosphere that have different density (dielectric constant).
Resistance - The property of material or substance to oppose the passage of current through it,
thus causing electrical energy to be converted into heat energy.
Resonance - The state or frequency of vibration, electrical or mechanical, in which forces that
impede the motion are minimum.
Skip zone - Is the area that starts when the ground wave ends and continues until the sky wave
hits the earths surface.
Take off angle - The angle measured from the earths surface or horizontal up to the direction of
propagation towards the ionosphere.
NVIS - Near Vertical Incidence Sky wave allows for decreased skip zones and is extremely
beneficial when operating in complex compartmentalized terrain. NVIS in theory allows for
successful communications in distances ranging from 10-300 miles.
Critical Angle wave - Is the steepest angle that a radio wave hits the ionosphere and is reflected
back to the earths surface vice punching through the ionosphere and continuing into space.
, ALE - Automatic Link Establishment is the process of making a point to point radio connection.
I'm ALE mode the radio scans for the best link ( frequency) to be utilized.
LQA - Link Quality Analysis is a test to measure the signal strength between radios. This is an
ALE function. Optimal range is 70-100.
LDV - Last Ditch Voice is a 3G voice capability. It sends a voice message over the air as data
which is then decrypted on the receiving voice end. The PRC-150 can store up to 1 LDV at a
time. Think of this function as a voicemail.
SINCGARS - Single Channel Ground Air Radio System provides Electronic Counter-Counter
measure freq hopping and single channel FM voice and data capability in the VHF band.
DAMA - Demand Assigned Multiple Access is satellite communications that utilize the UHF
band. The continental US (CONUS) are the (2) satellites we use in North America. F-6 sits at
105 degrees W and F-7 sits at 100 degrees W
SAA - Satellite Access Authorization is a product from a submitted Satellite Access request.
VSWR - Voltage Standing Wave Ratio the ratio of the amplitude of the electric field or voltage
at a voltage maximum to that at an adjacent voltage minimum.
Conductor - A material ( usually metal ) that has low resistance to the flow of electrical current.
Types of Conductors - Silver, copper, and aluminum
Counterpoise - A conductor or a system of conductors used as a substitute for ground in an
antenna system.
Transmission lines - A conductor that transfers RF energy from transmitter to the antenna.
Reflector/Directors - Reflectors consist of wire conductor behind the antenna and directors
consist of a wire conductor placed in front of the antenna. The reflector/director is not physically
connected to the antenna. A director will be 95% of the antenna length and the reflector will be
105% of the antenna length.
Resistors - Convert a bi-directional antennas radiation pattern into a directional pattern by
forcing radiation in a certain direction.
Antenna wire - Can be constructed from any electrically conductive material. ( i.e., slash wire,
barb wire, metal pipe, rain gutter, chain link fence etc).
Insulators - A device or material that has a high electrical resistance; a nonconductor of
electricity.
Types of insulators - Glass, plastic, or rubber
ANSWERS 2024/2025 LATEST UPDATED/GET A+
Omni-directional - Radiates and receives radio waves in ALL directions.
Uni-directional - Radiates and receives radio waves in ONLY ONE direction.
Bi-directional - Radiates and receives radio waves in TWO directions.
Diffraction - The process by which electromagnetic waves are bent so that they appear behind an
obstruction.
Directivity - The property of radiating more energy in some directions than in others.
Gain - The increase in signal strength that is produced by an amplifier.
Impedance - The measure of how difficult it is for current to flow through a conductor.
Noise - Random pulses of electromagnetic energy generated by lightning or electrical equipment.
Reflection - The turning back of a radio wave from an object or the surface of the earth.
Refraction - The bending, or changing direction, of a radio wave passing into or through layers
of the atmosphere or the ionosphere that have different density (dielectric constant).
Resistance - The property of material or substance to oppose the passage of current through it,
thus causing electrical energy to be converted into heat energy.
Resonance - The state or frequency of vibration, electrical or mechanical, in which forces that
impede the motion are minimum.
Skip zone - Is the area that starts when the ground wave ends and continues until the sky wave
hits the earths surface.
Take off angle - The angle measured from the earths surface or horizontal up to the direction of
propagation towards the ionosphere.
NVIS - Near Vertical Incidence Sky wave allows for decreased skip zones and is extremely
beneficial when operating in complex compartmentalized terrain. NVIS in theory allows for
successful communications in distances ranging from 10-300 miles.
Critical Angle wave - Is the steepest angle that a radio wave hits the ionosphere and is reflected
back to the earths surface vice punching through the ionosphere and continuing into space.
, ALE - Automatic Link Establishment is the process of making a point to point radio connection.
I'm ALE mode the radio scans for the best link ( frequency) to be utilized.
LQA - Link Quality Analysis is a test to measure the signal strength between radios. This is an
ALE function. Optimal range is 70-100.
LDV - Last Ditch Voice is a 3G voice capability. It sends a voice message over the air as data
which is then decrypted on the receiving voice end. The PRC-150 can store up to 1 LDV at a
time. Think of this function as a voicemail.
SINCGARS - Single Channel Ground Air Radio System provides Electronic Counter-Counter
measure freq hopping and single channel FM voice and data capability in the VHF band.
DAMA - Demand Assigned Multiple Access is satellite communications that utilize the UHF
band. The continental US (CONUS) are the (2) satellites we use in North America. F-6 sits at
105 degrees W and F-7 sits at 100 degrees W
SAA - Satellite Access Authorization is a product from a submitted Satellite Access request.
VSWR - Voltage Standing Wave Ratio the ratio of the amplitude of the electric field or voltage
at a voltage maximum to that at an adjacent voltage minimum.
Conductor - A material ( usually metal ) that has low resistance to the flow of electrical current.
Types of Conductors - Silver, copper, and aluminum
Counterpoise - A conductor or a system of conductors used as a substitute for ground in an
antenna system.
Transmission lines - A conductor that transfers RF energy from transmitter to the antenna.
Reflector/Directors - Reflectors consist of wire conductor behind the antenna and directors
consist of a wire conductor placed in front of the antenna. The reflector/director is not physically
connected to the antenna. A director will be 95% of the antenna length and the reflector will be
105% of the antenna length.
Resistors - Convert a bi-directional antennas radiation pattern into a directional pattern by
forcing radiation in a certain direction.
Antenna wire - Can be constructed from any electrically conductive material. ( i.e., slash wire,
barb wire, metal pipe, rain gutter, chain link fence etc).
Insulators - A device or material that has a high electrical resistance; a nonconductor of
electricity.
Types of insulators - Glass, plastic, or rubber
