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192 Cards in this Set
- Front
- Back
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Describe the construction of insulated wire. |
It is a conductor covered with a dielectric or insulating material. |
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Why is stranded wire used for aircraft installations? |
The conductors are stranded to provide flexibility. |
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What’s the function of the metallic braid on shielded cables? |
Provides a barrier against electromagnetic interference. |
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Describe the construction of coaxial cable. |
It consists of an inner conductor and an outer shield separated by an insulating dielectric. |
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Coaxial cable is used for what purpose? |
To carry RF power with minimal signal loss. |
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Define chafing and describe its possible effects. |
It occurs when a wire of cable repeatedly rubs against a system component of aircraft structure. The results of chafing are: possible shorting and arcing, system degradation, fire and possibly loss of life. |
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What are the two major contributors to chafing? |
Poor inspection habits during operations and maintenance and not documenting and reporting chafingproblems as they’re found. |
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What sign of chafing will aluminum tubing show? |
It will have a shiny appearance. |
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What type of coax or triax problem cannot be detected with a multimeter? |
Damage that prevents the cable from passing certain frequencies. |
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What do you call the ratio of voltage to current at the input? At the output? |
Input impedance; output impedance. |
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As far as the impedance is concerned, what will maximize the transfer of RF power from coax toantenna? |
Maximum transfer of power occurs when all impedances match. |
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What can an impedance mismatch between cables and components of a system cause? |
Excessive reflection which can cause reduced power transferred through a transmission line as well as transmitter failure. |
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What type of transmission line has two parallel conductors that are kept apart at a fixed distanceby a dielectric strip? |
Spaced two-wire line. |
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What part of a coaxial line protects the signal from the intrusion of foreign RF energy andminimizes signal leakage? |
The shield (outer conductor). |
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What does a coaxial shield do with unwanted RF energy? |
Diverts it to ground. |
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What are the advantages of a twisted pair? |
Flexibility, small size, and simple manufacturing |
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What’s the function of the grounded-copper braid shield in the shielded two-wire line? |
To prevent entry or exit of unwanted RF. |
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Name the three types of transmission line losses? |
I2R, dielectric, and radiation/induction. |
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Explain I2R loss. |
High frequency alternating current tends to flow near the surface of the conductor. This restricts the currentto a small part of the conductor’s cross sectional area, which causes a transmission line to offer much higher resistance to RF than it would to DC. |
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How can the impact of skin effect be reduced? |
It can be reduced by silver-plating the conductor. |
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Why do radiation losses occur? |
They occur because some magnetic lines of force about a conductor don’t return to the conductor. Instead, these lines of force radiate a portion of the signal’s power into space. |
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What distributed constant is caused by the magnetic field collapsing during an AC cycle,inducing a current into the wire? |
Distributed inductance. |
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What distributed constant is caused when two parallel transmission line wires act as plates whilethe insulator between them acts as a dielectric? |
Distributed capacitance. |
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In what unit is distributed resistance usually expressed? |
Ohms per foot. |
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What is the small current that flows between transmission line conductors called? |
Leakage current. |
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What is the property of an insulator that allows tiny amounts of current to pass between the twowires? What value is used to this property? |
Conductance; picomhos per foot (mho is just a backwards ohm). |
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How long must a waveguide bend be to prevent reflections? |
More than two wavelengths. |
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How do you prevent reflections in a waveguide that would be caused by a 90° sharp bend? |
By breaking the bend up into two 45° bends, one-quarter length apart. |
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What happens if the impedance at the receiver or radiating end of a waveguide is mismatchedwith the impedance of space? |
Standing waves cause reflection and power loss. |
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How does a feed horn eliminate reflections and the resulting power loss? |
By matching the impedance of the waveguide to the impedance of free space. |
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Is the ohm/multimeter the best troubleshooting tool for diagnosing an RF cable problem? Explain. |
No because with a multimeter any cable fault outside of a short or an open will probably go undiagnosed. |
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What can be detected by the TDR? |
Impedance changes caused by connectors, crimps, crushes, frays, opens and shorts as well as the distance to the impedance change. |
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What’s the longest length of cable the TDR can check? |
2,000 feet. |
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What does the trace on the CRT represent? |
The impedance at any given point along the cable under test. |
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Why should you avoid hooking the TDR up to a live wire? |
Voltages over 5V can damage the input circuitry, rendering the TDR useless. |
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What should you do after ensuring that no power is applied to the circuit and before hooking theTDR to a cable? |
Bleed or remove any built-up static charge from the cable. |
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Why should you be very careful when testing antennas with a TDR? |
If a nearby transmitter keys up, the TDR might be damaged. |
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What’s an incident pulse? |
The initial pulse (test pulse) that the TDR sends out into the cable. |
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How does the TDR display an open? |
It displays as an upward deflection of the trace equal to the size of the incident pulse. |
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How does the TDR display a short? |
It displays as a downward deflection of the trace equal to the size of the incident pulse. |
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What TO should you refer to for additional information on using the TDR? |
TO 33A1–4–73–1, 1502 Time Domain Reflectometer. |
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Name four methods of electrical connector coupling. |
Coupling can be accomplished using threaded coupling rings, friction coupling, bayonet locks, or push-pullcoupling devices. |
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Which part of the electrical connector is the receptacle and what part is the plug? |
Receptacle is fixed, plug is removable. |
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Which contacts should be connected to the hot side of the circuit? |
Socket (female contacts). |
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Which TOs should be used for repair and assembly of RF connectors? |
TO 1–1A–14 and applicable aircraft wiring TO. |
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What portion of the RF transmission path tends to be the weakest link and why? |
RF connectors tend to be the weak link in the RF transmission/reception path because they can be easily damaged. |
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Why should you be concerned with the bend radius of a cable near a RF connector? |
Too sharp a bend will damage the cable and put undo stress on the back of the connector where the cableenters the connector. This will typically cause premature breakage of the shielding at the back of theconnector. |
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State the difference between soldered and solderless connections? |
Solderless connectors depend on a mechanical rather than chemical bond. |
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What type of solderless connector is typically placed over a metal post and secured with a nut? |
Terminal lug. |
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What type of solderless connector allows two pieces of wire to form a continuous run? |
Splice. |
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What are the two types of connector pins? |
Pin contact and socket contact. |
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Why is it important to use the proper crimp tool and the correct setting when installing solderless connectors? |
Using the wrong tool and/or setting could lead to a weak or broken connection and possible damage to thetool. |
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How could attempting to crimp a pin or lug that is too large damage a crimping tool? |
Once the handle is started toward the closed position, it can’t be opened until its entire travel has been completed. |
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What problems might result from a crimp that’s too loose? |
It may result in a poor connection or the wire may pull out. |
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What problems might result from a crimp that’s too tight? |
The wire and pin can be weakened and will be prone to breaking. |
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How would you determine what positioner and indenter selector knob position you should usewhen replacing a pin on a solderless connector plug? |
Consult the aircraft wiring TO or TO 1–1A–14. |
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How would you determine if a connector plug is front-release of rear-release? |
There’s a blue color band around rear-release connectors. |
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When repairing a solderless connector plug, what’s the possible result of using the wrong sizeinsertion tool? |
Damage to the retention clip of the connector or damage to the tool. |
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What’s the only approved method of heat shrinking on a fueled aircraft? |
Use an explosion proof heat gun (HT–900 or equivalent). |
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(201) What protects a coaxial cable from moisture and abrasion?a. center conductor.b. inner conductor.c. metallic braid over the insulation.d. outer jacket. |
D |
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(201) What technical order (TO) has detailed explanation of aircraft wiring, cables, and wiring repair procedures?a. TO 1–1A–2.b. TO 1–1A–8.c. TO 1–1A–14.d. TO 1–1A–22. |
C |
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(201) What sign of chafing will wire insulation/shielding show?a. Broken center conductor.b. Dented dielectric material.c. Dull, rough appearance.d. Shiny, smooth appearance. |
C |
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(202) Which component feels the input impedance?a. Antenna.b. Control panel.c. Receiver.d. Transmitter. |
D |
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(202) Which type of transmission line has one of its two conductors that is a grounded braided wiretube surrounding the center conductor?a. Coaxial line.b. Shielded pair.c. Spaced two-wire line.d. Twisted pair. |
A |
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(202) Which type of transmission line has a grounded copper braid shield?a. Coaxial.b. Shielded two-wire.c. Spaced two-wire.d. Twisted two-wire. |
B |
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(202) Which loss occurs when the electromagnetic field about a conductor cuts through a nearby metallic object?a. Copper loss.b. Dielectric loss.c. Radiation loss.d. Induction loss. |
D |
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(203) Flexible waveguides are covered with rubber toa. protect them from electrical static discharge.b. make them both airtight and watertight.c. prevent RF reflections.d. prevent chaffing. |
B |
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(203) The feedhorn eliminates reflections by matching the impedance of the waveguide to theimpedance ofa. the amplifier.b. the oscillator.c. internal space.d. free space. |
D |
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(204) What is the initial pulse the time domain reflectometer (TDR) sends into the cable called?a. Amplifier pulse.b. Incident pulse.c. Receiver pulse.d. Reflected pulse. |
B |
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(204) Any change in the impedance of the cable will send a signal back to the time domainreflectometer (TDR) asa. an amplifier pulse.b. an incident pulse.c. a receiver pulse.d. a reflected pulse. |
D |
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(205) Which part of the electrical connector attaches to a bulkhead or extends from a linereplaceable unit (LRU) case?a. Backshell.b. Bulkhead.c. Plug.d. Receptacle. |
D |
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(205) Which is the removable part of the electrical connector and includes the coupling device?a. Backshell.b. Bulkhead.c. Plug.d. Receptacle. |
C |
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(205) Which type of connector is used primarily with coax, twinax, and triax cables?a. Electrical.b. Miniature.c. Radio frequency.d. Typical. |
C |
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(205) Radio frequency (RF) connectors are the weak link in the RF transmission and receptionpath because a. they are easily damaged.b. there is an impedance mismatch.c. resistance is higher than current flow.d. resistance is lower than current flow. |
A |
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(206) The connection bond on a solderless connector isa. chemical.b. fixed.c. mechanical.d. terminal. |
C |
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(206) Which type connector is placed over a metal post and then secured with a nut forming areliable electrical connection?a. Radio frequency.b. Solder.c. Splice.d. Terminal lug. |
D |
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(206) Connecting and disconnecting more than one wire at a time is the advantage of thea. waveguide.b. connector plug.c. terminal lug.d. splice. |
B |
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(207) The most common mistake when using the wire repair kit is selecting the wrong tool anda. using the wrong wire.b. not checking the calibration.c. selecting the wrong connector pin.d. using the wrong settings. |
D |
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(207) Which knob on the pin crimper tool allows you to adjust how tight the pin will be squeezedduring the crimping process?a. Crimp selector knob.b. Indenter selector knob.c. Pin selector knob.d. Pressure selector knob. |
B |
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(207) What color bands are around rear-release connector plugs?a. Blue.b. Green.c. Red.d. Yellow. |
A |
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(207) When a connector plug must be moisture sealed, use heat shrinkable tubing ora. electrical tape.b. gaffers tape.c. silicone tape.d. fiberglass tape. |
C |
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A synchro generator does what? |
It converts mechanical position into an equivalent electrical position signal. |
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A synchro motor does what? |
It converts an electrical position signal into an equivalent mechanical position. |
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Synchro motors and generators have stators that are set 120 apart. What do we call thisarrangement? |
Wye-wound. |
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What‘s the only difference between synchro generator and synchro motor construction? |
The difference is rotor construction. The synchro motor has a heavy metal flywheel, called an inertiadamper, mounted on the shaft. |
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The synchro motor‘s inertia damper does what? |
It reduces motor oscillations during sudden starts or stops of the synchro motor. |
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What component subtracts a mechanical input from an electrical one and transmits thedifference? |
The synchro differential generator |
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How is a differential‘s rotor constructed? |
It‘s cylindrical, with three sets of Y-connected coils wound in slots that are spaced 120 apart. |
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What synchro device makes trigonometric calculations? |
The resolver. |
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What type of devices are synchros? |
Electromechanical. |
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Name the type of synchro system that exhibits the following behavior: As you turn the synchrogenerator‘s shaft, the motor‘s shaft follows exactly and simultaneously. |
The basic synchro system |
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Why doesn‘t current flow between the generator and motor stators when both rotors are inequivalent positions? |
Because the identical position of each rotor induces identical voltages into each parts‘ stators. With equalvoltage, no difference of potential exists for current to flow. |
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When the synchro generator‘s rotor turns, creating a difference between the system‘s rotor positions, a difference of potential is created between the stators. How does this cause the motor to reposition its rotor to match the generators? |
The difference in potential causes current to flow between the stators. This current creates magnetic flux fields that exert a force to move the motor‘s rotor to the same position as the generators. |
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Of what does a simple servomechanism consist? |
synchro generator, a control transformer, an amplifier, and a servomotor. |
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What does feedback do in a servomechanism? |
It acts to null out the error signal. |
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Briefly describe the binary number system. |
The binary system uses the radix two (2). It has only two symbols, 0 and 1, and you can write any number using these two symbols. Zero is the placeholder for the system, while one stands for 1, unity, or a singleunit. |
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In the base-two system, as the exponent increases by 1, what happens to the value of the number? |
The value doubles. |
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What happens to the value of a number when the negative exponent decreases by 1 (from 2^–3 to 2^–4)? |
The value is halved. |
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When using the division method, what are the three rules used to convert decimal numbers tobinary numbers? |
Divide by 2. The first remainder 0 or 1 becomes the LSD of the binary number. Continue to divide by 2 until the final quotient is 0. |
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What is the normal method used for converting binary numbers to decimal form? |
The addition method. |
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The addition method for converting binary-to-decimal requires that you add together what values? |
The values of the positions that are occupied by 1s in the binary number. |
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What‘s the major difference between the octal, binary, and decimal number systems? |
The base (radix). |
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What‘s the base or radix of the octal number system? |
8 |
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What‘s the value of a digit in an octal number? |
The digit multiplied by the power of the place it occupies. |
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What is the radix of the hexadecimal number system? |
A radix, or base of 16. |
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How can HEX numbers be identified as hexadecimal? |
Hexadecimal numbers can be preceded by the symbol X, with a prime mark () after the HEX characters. Sometimes the subscript 16 is also used; or the letter H may be used following the HEX number. |
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What‘s the function of an antenna? |
To radiate electromagnetic energy into or collect electromagnetic energy from space. |
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Why is an antenna considered to be a transducer? |
Because it converts energy in the form of current oscillations to electric and magnetic fields of force. |
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How does an antenna convert received fields back into RF current? |
When the electromagnetic fields traveling through space cut across the receive antenna, they impress a voltage across the antenna, which causes a current to flow to a receiver. |
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What‘s required of the transmitting/receiving antennas to provide maximum communicatingdistance? |
Maximum efficiency. |
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Which AM transmitter component generates a low-amplitude signal at a low frequency? |
Master oscillator. |
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What is used to produce the ―load‖ on the oscillator in an AM transmitter? |
Low-frequency, low-power signal applied to a system of multipliers and power amplifiers |
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Which AM transmitter section controls the overall stability of the system? |
Oscillator. |
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What‘s the function of the buffer in an AM transmitter? |
To isolate the oscillator from the multiplier and amplifier load. |
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What‘s used to increase the AM oscillator frequency to the designed frequency required for carrier wave operation? |
Combinations of doublers and triplers. |
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What‘s the function of the power amplifiers in an AM transmitter? |
To bring the level of the carrier up to the appropriate power level for transmission. |
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Why is an intermediate power amplifier sometimes required in an AM transmitter? |
To establish a more appropriate level of ‗driving‘ power at the input to the final amplifier. |
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Which AM transmitter component modulates the audio signal from the modulator with the carrier wave from the RF unit? |
Final amplifier. |
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What‘s the name of the process used in modulating AM signals? |
Heterodyning. |
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What‘s the purpose of the audio power amplifier in the modulator section of an AM transmitter? |
To receive its driving signal from the audio voltage amplifier and amplify the signal to the proper level for modulating the carrier wave at the final power amplifier in the RF section. |
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What controls the reactance that controls the oscillator frequency in an FM reactance modulator? |
The audio signal from the audio amplifier. |
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What‘s the purpose of the frequency multiplier in an FM transmitter? |
To raise the modulated frequencies to the assigned channel and increase the amount of frequency deviation to the maximum allowable. |
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What‘s the function of the discriminator in the AFC circuit? |
To detect any change in the converter‘s difference frequency and produce an AFC correction voltage tovary the reactance of the modulator, causing the oscillator to return to the desired center frequency. |
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What‘s the purpose of the preemphasis circuit in the audio amplifier? |
To overcome the difference between the high- and low-frequency components in the transmitted signal. |
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a. Selection. |
a. The ability of the receiver to select a particular frequency of a station from all other station frequencies appearing at the antenna of the receiver. |
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b. Sensitivity. |
b. The ability of a receiver to reproduce weak signals. |
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c. Noise. |
c. A major limiting factor of sensitivity because it can prevent the receiver from responding to very low signal inputs. |
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d. Selectivity. |
d. Ability of a receiver to distinguish between the desired signal and unwanted signals nearby in operating frequency. |
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What two signals are heterodyned in the receiver mixer to obtain the IF signal? |
Output of the amplifier and input from the local oscillator. |
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Explain the term ganged tuning. |
The process used to tune two or more circuits with a single control. |
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How many stages of IF amplification may a superheterodyne receiver contain? |
As many as needed to obtain the desired power output. |
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What is heterodyning? What does it produce? |
The process of mixing the input RF signal with the local oscillator signal; four different frequencies—two original frequencies, their sum, and their difference. |
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What‘s the purpose of the detector circuit? |
To extract the modulating audio signal. |
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Why must an FM receiver have a wideband IF amplifier stage? |
To receive and pass all the side-frequency components of the modulated signal without distortion. |
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What two fundamental sections of the FM receiver are electrically different from an AMreceiver? |
Discriminator (detector) and limiter. |
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What‘s the difference between AM and FM demodulation? |
AM demodulation involves the detection of variations in the amplitude of the signal; FM demodulation is the process of detecting variations in the frequency of the signal. |
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What function does the limiter circuit perform? |
Removes amplitude variations from the signal to minimize noise interference. |
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What‘s the function of a discriminator circuit? |
To extract the audio frequency component from the FM signal. |
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Why does FM provide more realistic sound reproduction? |
Because of an increase in the number of sidebands. |
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(208) A synchro motor convertsa. a mechanical position into an equivalent electrical position signal.b. a mechanical position into a higher electrical position signal.c. an electrical position signal into an equivalent mechanical position.d. an electrical position signal into a higher mechanical position. |
C |
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(208) Synchro motors and generators have stators that are seta. 30° apart.b. 60° apart.c. 90° apart.d. 120° apart. |
D |
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208) Why is the synchro motor inertia damper necessary?a. Reduces motor oscillations.b. Prevents the motor from overheating.c. Prevents the rotor shaft from breaking.d. Connects the rotor windings to the external circuit. |
A |
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(208) The amount of coupling between the primary and either secondary of a resolver isdetermined by thea. number of degrees the rotor is turned.b. number of degrees the stator is turned.c. direction the rotor is turned.d. direction the stator is turned. |
A |
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(208) What synchro device makes trigonometric calculations?a. Generator.b. Motor.c. Resolver.d. Servomechanism. |
C |
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(209) In a basic synchro system, as you turn the synchro generator‘s shaft the motor‘s shafta. lags 90 degrees.b. leads 90 degrees.c. follows exactly.d. stops turning. |
C |
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(209) Which is best used when a larger amount of torque is required?a. Basic synchro.b. Differential.c. Resolvers.d. Servomechanism. |
D |
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(209) When a change in position input to the servomechanism occurs, what signal is amplifiedand applied to the servomotor?a. Error signal.b. Load signal.c. Position signal.d. Transformer signal. |
A |
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(210) Which numbering system has only two symbols, 0 and 1?a. Binary.b. Decimal.c. Hexadecimal.d. Octal. |
A |
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(210) Using the division method, convert 136(10) to its binary equivalent.a. 10010000.b. 10001000.c. 10000100.d. 10000011. |
B |
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(210) Using the addition method, convert 11100110 to decimal form.a. 56(10).b. 110(10).c. 230(10).d. 314(10). |
C |
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(211) Which numbering system uses eight symbols?a. Binary.b. Decimal.c. Hexadecimal.d. Octal. |
D |
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(211) Convert the octal number 347(8) to binary form.a. 11100111.b. 11101011.c. 11110111.d. 11101101. |
A |
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(211) Convert the binary number 1110111(2) to octal form.a. 127(8).b. 147(8).c. 167(8).d. 187(8). |
C |
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(212) Which numbering system has a radix of 16?a. Binary.b. Decimal.c. Hexadecimal.d. Octal. |
C |
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(212) Convert the binary number 111100000101(2) to its hexadecimal equivalent form.a. XE05.b. XF05.c. XF03.d. XE03. |
B |
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(212) Convert the hexadecimal number X54D to binary form.a. 11101001101(2).b. 10111001101(2).c. 10101001101(2).d. 10101001001(2). |
C |
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(212) Convert the hexadecimal number XF6B7 to binary form.a. 1011011010110111(2).b. 1101011010110111(2).c. 1110011010110111(2).d. 1111011010110111(2). |
D |
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(213) A conductor or set of conductors used to radiate electromagnetic energy into or collect electromagnetic energy from space is calleda. a transmitter.b. an oscillator.c. a receiver.d. an antenna. |
D |
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(213) What is designed to receive high-power radio frequence (RF) energy from the transmitter and radiate a narrow pencil beam of RF energy for target illumination?a. Arrays.b. Efficiency.c. Gain.d. Reciprocity. |
A |
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(214) In an amplitude-modulated (AM) transmitter, the modulator section is divided into themodulator and thea. buffer.b. oscillator.c. radio frequency (RF) power supply.d. Speech amplifier. |
D |
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(214) The process used in modulating the amplitude-modulated (AM) signals is calleda. buffering.b. detecting.c. heterodyning.d. oscillating. |
C |
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(214) In a frequency-modulated (FM) transmitter, which portion of the automatic frequency control (AFC) produces the AFC correction voltage?a. Converter.b. Crystal oscillator.c. Discriminator.d. Low-pass filter. |
C |
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(215) The ability of a radio receiver to reproduce weak signals is calleda. reproduction.b. sensitivity.c. reception.d. detection. |
B |
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(215) In a typical amplitude-modulated (AM) superheterodyne receiver, the process used to tune two ormore circuits with a single control is calleda. slug tuning.b. ganged tuning.c. parallel tuning.d. staggered tuning. |
B |
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(215) Two fundamental sections of the frequency-modulated (FM) receiver that are electrically differentfrom those in the amplitude-modulated (AM) receiver are thea. discriminator and limiter.b. limiter and audio amplifier.c. local oscillator and detector.d. radio-frequency amplifier and discriminator. |
A |
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(215) Frequency-modulation (FM) provides more realistic sound reproduction over amplitude-modulation (AM) becausea. of detection of the second detector.b. the heterodyning process in the mixer stage.c. of an increase in the number of sidebands.d. FM has fewer frequencies available. |
C |
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What provides the mating surface between the aircraft and the Sniper pod? |
The ADU-577/A. |
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What does the Sniper pod use to identify targets to others and for targets identified by others? |
The pod has a laser marker to identify targets to others and a laser spot tracker for targets identified by others. |
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Identify the components housed in the optical bed assembly and what do they provide? |
Houses the lasers, sensors, and associated optics that provide the crucial tolerances required to meet the LOS stability and pointing accuracy requirements of the pod. |
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Briefly describe what the shortwave optics assembly provides? |
Provides a method of steering the LST, LRR, and TV LOS to the laser LOS. |
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Which assembly is the primary pod structure that supports the optical bed assembly and interfaces the pylon adapter assembly? |
Aft structure assembly. |
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Describe how the primary steering of the Sniper pods LOS is accomplished? |
With the roll, pitch, and yaw controls. When roll is combined with the pitch commands, the Sniper pod achieves full spherical coverage for the LOS less a 500 diameter cone aft of the pod. |
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How long is TGT IR NRDY displayed while the pod cooler achieves detector cool down? |
5 to 8 minutes, but may take less than 5 minutes or as long as 14 minutes, depending on ambient temperature conditions. |
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How many types of BIT are there in the Sniper pod? |
The Sniper pod has three types of BIT; SBIT, PBIT and IBIT. |
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Describe how functional failures can be cleared? |
Running a clean IBIT on the Sniper pod or removing the pod from the aircraft |
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What does the Litening pod targeting system provide? |
Target acquisition, tracking, LD for an A-G, day or night, beyond visual-range precision strike capability. |
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Why is the Litening pod designed with a modular construction? |
Because it allows for rapid replacement of LRUs and increases pod reliability. |
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Describe the Litening pod’s forward section. |
It is stabilized observation system that contains three on-gimbal EO sensors (FLIR TIS, CCD camera, and LSD), an LD, inertial sensor unit, an LOS control mechanism, and several components of the environmental control system. |
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What does the ECU provide for the Litening pod? |
It provides temperature control for the internal space of the TGP. |
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What does the Litening pod’s format give you? |
It gives you control, displays, and FLIR video on the cockpit display for locating, identifying and tracking A-A and A-G targets. |
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Describe the purpose of the main menu page associated with the Litening pod. |
It is used to operate all the frequent operational functions of the Litening pod in all of its operational modes except for BIT mode. |
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What does the continuous BIT do? |
Continuous BIT—Monitors TGP failures during system operation. |
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How long does the IBIT take? |
Approximately 3 minutes. |
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(216) Which assembly houses and provides the electrical interface for the electronic circuit assemblies (ECA) and power supplies? a. Gimbal housing assembly. b. Shortwave optics assembly. c. Laser range receiver assembly. d. Forward electronics chassis assembly. |
D |
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(216) What makes up the aft end of the Sniper targeting pod (TGP)? a. Gimbal housing assembly. b. Environmental control unit. c. Laser range receiver assembly. d. Forward electronics chassis assembly. |
B |
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(217) Which built-in-test (BIT) can be completed at anytime and must have the pod set to STBY (standby) mode? a. IBIT. b. PBIT. c. MBIT. d. SBIT. |
A |
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(218) The Electro-Optical AN/AAQ–28 pod is also called the a. Litening pod. b. Navigation pod. c. Sniper pod. d. Target pod. |
A |
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(218) The pod must be removed from the aircraft for malfunctions associated with which section? a. Environmental section. b. Forward section. c. Rear section. d. Roll section. |
D |
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(218) Which section provides the electrical interfaces between the pod sections and units as well as between the pod and the aircraft? a. Environmental section. b. Forward section. c. Rear section. d. Roll section. |
C |
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(219) During which built-in-test (BIT) is the Litening pod’s inertial navigation unit aligned? a. Alignment BIT. b. Continuous BIT. c. Initiated BIT. d. Power-On BIT. |
D |
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(219) Which Litening pod built-in-test (BIT) monitors the pod for failures during system operation? a. Alignment BIT. b. Initiated BIT. c. Continuous BIT. d. Power-On BIT. |
C |
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(219) How long does the initiated built-in-test (IBIT) take on the Litening pod? a. 1 minute. b. 3 minutes. c. 5 minutes. d. 8 minutes. |
B |
