18-12 update

What is defined as "Most widely used system of units, both in science & everyday commerce"

What is a decibel (dB) used for in relation to EW?

Explain the SI prefix for each whole number.

What is the formula for determining the dB difference between two power ratios?

To effectively jam a signal what must the power be?

Name the 3 parts of an atom and their charges?

What are the 6 methods to can create voltage?

What are the two forms of energy?

Energy contained in an object due to its motion is _____ energy.

Energy contained in an object due to its position is ____ energy.

What is the process by which an atom gains or loses electrons?

What is a material that is good at allowing electricity to flow through it?

What is defined as "extremely high resistance to the flow of electricity"?

what is defined as "all matter between the extremes of conductors and insulators"?

What does P,I,E and R represent on the Ohms law pie chart?

In the formula dB = (P2/P1)log x 10 what does P1 and P2 represent?

What is defined as "Determined by the direction of the lines of force making up the electric field"?

This propagates in all directions

This propagates in a specific direction while minimizing propagation in other directions

Defined as "an antenna built for transmitting a certain signal is equally good at receiving that same signal"?

This is defined as "the number of waves that pass a fixed place in a given amount of time"

Time it takes for the completion, from any given point of a wave to the same point on the next wave.

The distance between repeating units of a wave, usually measured in meters?

Highest point of a wave

Lowest point of a wave

Defined as "height of a sine wave measured in peak or peak-to-peak"

Defined as "movement through a medium"

What are the three layers of the Earth's atmosphere?

Defined as "Bouncing off on substance to extend the range of a radio wave"?

Defined as "Radio wave bending as they move from one medium to another"?

This is when a radio wave "bends" around an object.

What factors affect Ionosphere refraction?

Explain the relationship between the wavelength and the frequency of the EM spectrum.

SI is composed of what?

A negative ion has ____ than its normal amount of electrons.

a positive ion has ___ than its normal amount of electrons.

Defined as "the process by which an atom gains or loses its electrons".

To generate voltage through magnetism what three things are needed?

Electromagnetic Waves is generated by __ power.

Radio waves travel at what speed?

EM waves are what type of wave form?

Where is the stratosphere located and what effects does it have on radio waves?

The troposphere has what effect on radio waves?

Which layer contains four layers of electrically charged ions?

What are the two principle RF transmitting methods?

What are some of the things that may affect the propagation of a radio wave?

What type of transmission is used for long range OTH communications?

What are the layers of the Ionosphere during the day? Night?

What is a skip zone?

What is usually the major loss of energy due to?

What some examples of natural electromagnetic interference (EMI)?

What is meant by fading?

What is the medium for EM waves?

What is ducting?

What type of current is typically used when forming a radio wave?

When current is applied to a wire what happens?

The EM or radiation field is made up of what?

Radio waves are expressed in terms of what?

What is wavelength?

What are the two primary types of polarization for radio waves?

What is the basic principle of coulombs law of charges?

Electric potential is measured by what?

What is defined as "A circuit that has current flowing in both directions"?

What is true about current in a series circuit?

What is wattage?

How much of a power difference is required to be effectively jamming?

What are the three modes of Communication?

Explain

What is the process of putting information on a carrier wave?

What is a electro magnetic wave that can be modulated as in frequency, amplitude, or phase?

What is Amplitude Modulation?

What is Frequency Modulation?

What is Phase Modulation?

What are three major classes of digital modulation techniques?

What is a form of modulation which represents digital data as variations in the amplitude of a carrier wave.

What are the two common examples are Phase-shift keying (PSK)

What is a form of frequency modulation in which the modulating signal shifts the output frequency between predetermined values?

What is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave

What is an undesired lower-power input signals that may be present at or near the frequency of the desired signal. 

What is a combination of a radio receiver and a radio transmitter that receives a weak or low-level signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation

What are the four major GSM frequencies that have become standard worldwide. They include GSM-900, GSM-1800, GSM-850, GSM-1900 and GSM-400.

What are the two network frequencies that are utilized to uplink and downlink the GSM network called? 

What are they offset by?

What are the four database elements of the Mobile Switching Center (MSC) are distributed to key sub-components that aid the MSC?

WHat type of antenna is cheap and simple to make and typically operates with freqs of 12-50 MHz?

This antenna provides directional capabilities and is excellent for communications jamming.

This antenna provides high gain and low side lobes levels and is mechanically cumbersome.

Thsi antenna allows wideband impedance and has a circularly polarized radiation field.

What type of antenna is high gain reflector commonly used in TV, data links, and satellites communications?

This s the most popular omni-directional, half wave antenna

What four precise measurements can a radar provide?

In relation to radar, what is the time the transmitter sends out RF energy?

In relation to radar, what is the beginning of one pulse to the beginning to another?

In relation to radar, what is the # of pulses per second a radar transmit?

In relation to radar, what is Beamwidth?

Whats the ratio of the time the  transmitter operates to the time it could operate during a given transmission cycle?

Where does a radar have the most power and detection usually occurs?

What is located directly opposite of the main lobe and has significant less sensitivity and signal strength.

What is similar to the back lobe and adds another dimension to the radar pattern with sensitivity of 40-50 dBS?

What is the ability of a radar to display two targets flying at approximately the same range and azimuth with little altitude separation?

What is the ability of a radar to display two targets flying at approximately the same range with little angular separation

What is the ability of a radar to separate two targets that are close together in  range  and  are  at  approximately  the  same  azimuth and is determined by pulse width.

What are the primary components of a radar system?

What is the difference between active and passive jamming?

Explain Barrage and spot noise jamming.

What is a device that is designed to replicate similiar or better targets with electronic signatures?

What is the difference between an active decoy and a passive decoy?

What allows the base station to communicate with the moblie devices and is commonly referred to as the air interface?

What are the three types of schemes utilized in the GSM network and explain?

What two numbers can you find on a mobile device and what are they use for?

What is the primary limitation of frequency reuse in the GSM networks?

What part of the GSM network controls call handoff?

What are the 2 basic components of a longe range cordless phone network?

What are the primary satellite communications frequencies?

What does a Thuraya user need IOT access the GSM networks?

What are the three primary Satellite communications providers and which offers global coverage?