| Terms |
Definitions |
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Angel of...?
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Relflection
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Which electronic counter measurement counts the number of bits in a pulse train?
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Totalize
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What personell evaluation is conducted on newly assigned personell within 6 months of assingment to workcenter(12 for ANG)
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Primary
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Non-uniform quantizing and compounding decreases the length of the code word from...?
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11-7 bits
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Which analog multimeter control compensates for the voltage of the internal batteries when calibrating for resistance measurements?
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Zero Ω (ohms) control
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What logorithmic expression do we use to specify the ratio of power loss in fiber optic cables?
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dB/Km
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What position of the input coupling switch do we use to view digital-type or square-wave signals?
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DC
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What principle does the time domain reflectometer use to test cables?
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Radar
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What component of fiber optic cable provides the reflective surface that allows light to propagate?
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Cladding
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With what values do we measure insulation resistance?
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Ohms/Megohms
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By using 16PSK how many bit combinations are allowed to be used?
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4
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Isulation resistance increases if...?
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The insulation thickness increases
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Using Longitudal Redundancy Check method of error correction, what does the reciever compare with the tranciever to ensure an accurate transmission of data?
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Block Check Character
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What purpose of modulation prevents interference when sharing the same communication path?
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Channel Allocation
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A 10 KHz modulating signal has produced enough peak voltage to cause a deviation of 30 Khz. What is the modulation index?
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3
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How many SMSgt 9-Level positions are in the Communication Electronics Career progression ladder?
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2
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What is used to match the input impedance of a circuit under test?
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Attenuators
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In the internal clock generator section of a typical bit error rate test set, what generates the basic clock that provides all clock phases, & is periodically frequency calibrated by a crystal controlled oscillator in the auto calibration section?
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Voltage Controlled Oscillator
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What part of the pulse code modulation process converts a continuous time signal into a discrete time signal?
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Sampling
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How do you place multimeter test leads in a cicuit to measure voltage?
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Parallel
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Which feature of the Fluke 8025A multimeter do you use to select various measurement functions?
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Rotary switch
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What pattern simulator section of a BERT set controls the clock selector & selects the external clock or the internal clock for processing?
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Data/Clock Encoder
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What type fo AFSC dhows your highest skill level?
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Primary
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What pattern simulator section of the BERT set converts the NRZ-L data into the desired coding such as NRZ-M?
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Code Converter
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In the internal clock generator of a typical BERT set, what generates the clock?
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VCO
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Propagation of light as seen by Snell's Law is known as what?
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Total internal reflection
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What do we call the power that is reflected back to an optical source in the time domain reflectometer?
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Backscatter
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What color is used to mark sewer and drain lines?
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Green
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What pattern simulator section of the bit error rate test set accepts a 48-bit parallel word & generates a serial pattern?
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48-bit transmitter only
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The relationship of the bandwidth required for double-sided emitted carrier (DSBEC) AM to the bandwidth of the modulating signal of the AM bandwidth alone is what?
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Twice the modulating bandwidth
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Which pattern simulator section of a bit error rate test set controls the clock selector and selects either the external clock or the internal clock for processing?
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Data/Clock select encoder
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Which probe does not need to actually make contact with the circuit under test?
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Current Probe
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What is a radio frequency generator used to do?
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Align telemetry receivers
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How many hours of rest must a supervisor allow for personell?
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8 hours
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What 2 error detection methods, when used together are 98% effective in detecting errors?
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VRC & LRC
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Which feature of the Fluke 805A Mulitimeter do you use to slect various meausurment functions>
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The Rotary Switch
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How can multiple individual task assignments be put together for multiple duty positions including additional duties?
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An Individual Training PLan
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Who is responsible for the operation of the Integrated Maitenance Data System(IMDS)?
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Host Database Manager
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Which probe does not actually need to make contact with the circuit under test?
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Current Probe
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What is the range of record points the Tektronic 2230 digital storage oscilloscope can aquire?
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1K-4K points
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What type of deflection return on the TDR CRT would indicate a cable "short"?
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Downward reflections "pip"
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What type of fiber is the least efficient, with the highest dispersion & has a core diameter of 30μm to over 800μm?
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multimode step-index fiber
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Insulation resistance increases if what happens?
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Thickness of the insulating material increases
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The angle between the normal in the first material and the ray that is bounced back in the first material is called the what?
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Angle of reflection
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How does synchronous transmission reduce the overhead costs of data transmission?
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Blocks many characters together for transmission
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What designates equipment as reportable?
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If the equipment is mission essential
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When will intial evaluations be done on assigned personell within a workcenter?
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60 days /120 (ANG)
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What serves as a unique identifier for tracking maitenance actions for an equipment malfunction?
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Job Control Number
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If there is a delay in Maitenance actions, who mediates between the operators and maitenance staff?
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Chief of Maitenance
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What type of sampling does an O-Scope normally use on a signle-shot or seldom-occuring signal?
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Real Time Sampling
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What is the minimum rank to be a task certifier?
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SSgt
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What type of Megohmeter do you use on proper insulated conductor cable?
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500 Volt
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Which probe lets you use the O-Scope to measure higher voltage levels?
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10:1 Passive Probe
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What type of fiber has a core diameter of 50-125μm & consists of numerous concentric layers of glass, something like the annular rings of a tree configured to reduce dispersion?
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Multimode graded-index fiber
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What advantage do the spectrum analyzer's sensitivity and wide dynamic range provide?
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A way to measure low-level modulation
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In PM the carriers phase is hifted at the rate of ...?
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The modulating signal.
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What do we consider to be a maitenance information system?
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Telephone Managment System
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Which feature of the Fluike 805A locks the meaurment into display for viewing?
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The Touch/Hold puch button
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What is a security feature of using fiber optic cable
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Virtually impossible to tap a fiber optic cable unnoticed
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What is the difference between vertical redundancy check (VRC) and longitudinal redundancy check (LRC)?
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VRC checks each character for odd parity; LRC checks the entire horizontal line within a block for odd or even parity
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What is the first step in Pulse Code Modulation
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The signal is Band-Limited
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What are the 3 phases that are evaluated in a personell evaluation?
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Preparation, Task Performance, Post Performance
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A power reading that uses the abbreviation dBm indicates the....
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Ratio of decibels relative to a 1-milliwatt standard
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What status id the smae as "Estimated time in Comission"?
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Estimated Time of Return to Operation
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If a system is to co-exist with an AF LAN, what is requiered before the system can be integrated?
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A certificate of Networthiness.
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What Evaluation is conductd to make sure technicians meet FAA Requirements?
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Air Traffic Control & Landing Sytems Certification
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The MOST useful way to classify fiber optic cables is by what?
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refractive index profile and number of modes
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What is the first step in basic Bit Error Rate Testing procedure?
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A known bit pattern, usually pseudo random, is generated and compared.
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Which is the primary means of measuring the quality of transmitted digital information, & how is the means derived?
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BER, the ratio of the number of bits in error to total number of bits transmitted
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During a basic BERT procedure an error signal occurs if...?
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Any bit in the recieved signal is different than the generated bit.
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When using the AN/PSM-2 megger, how do you know you are applying the correct regulated output voltage?
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Turn the hand-crank at a rate to keep the indicator lights at a steady glow.
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