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Details

CDC 2EX5X Vol. I-II
Multiple Choice Questions (Unit Review Exercises)
101
Other
Professional
02/19/2008

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Term

What are the 3 types of Digitial Storage O-Scope acquisition modes & what is the stadard operating mode?

Definition
Sample, Peak Detect, and Averaging. Sample
Term
What is the first step in basic Bit Error Rate Testing procedure?
Definition
A known bit pattern, usually pseudo random, is generated and compared.
Term
Which probe does not actually need to make contact with the circuit under test?
Definition
Current Probe
Term
What type of Megohmeter do you use on proper insulated conductor cable?
Definition
500 Volt
Term
Using Longitudal Redundancy Check method of error correction, what does the reciever compare with the tranciever to ensure an accurate transmission of data?
Definition
Block Check Character
Term
Which O-Scope Probe is essentially just a shielded piece of wire?
Definition

Passive 1:1 Probe

Term
What digital storage O-Scope circuit compensates for high sampling rates of High F signals?
Definition
Charged Coupling Device
Term
What pattern simulator section of the BERT set converts the NRZ-L data into the desired coding such as NRZ-M?
Definition
Code Converter
Term
Which mode of triggering an O-SCope causes a trace to appear on the screen at all times, wether there is an input signal or not?
Definition
Auto
Term
What is the primary means of measuring the quality of the transmitted digital information & how is this means derived?
Definition
(BER) Bir Error Rate. The ratio of the number of bits in error to the total number of bits trnsmitted.
Term
What pattern simulator section of the BERT set acepts a 48 but parallel word & genertaes a serial pattern?
Definition
48 bit transmitter only
Term
What pattern simulator section of a BERT set controls the clock selector & selects the external clock or the internal clock for processing?
Definition
Data/Clock Encoder
Term
In the internal clock generator of a typical BERT set, what generates the clock?
Definition
VCO
Term
Most fiber optic links use infared lights with a frequency range of...?
Definition
750-1500nm
Term
Non-uniform quantizing and compounding decreases the length of the code word from...?
Definition
11-7 bits
Term
What data circuit speed would use shorter generated bits & at what speed?
Definition

Low to Intermediate, 1200-9600bps

Term
The most useful way to classify fiber optic cable is by...?
Definition
Refractive index & number of modes
Term
Low insulation Resistance between conductors can cause what?
Definition
High Attenuation, crosstalk, and noise
Term
What type of fiber has a core diameter of 50-125 um & has a multiglass layer with rings simlar to a tree
Definition
Multimode graded-index
Term
What part of the pilse code modulation process coverts a continuos time signal into a discrete time signal.
Definition
Sampling
Term
What is the first step in Pulse Code Modulation
Definition
The signal is Band-Limited
Term
By using PSK instead of Binary Phase Shift keying, information capacity is increaed by how much?
Definition
3 Times
Term
In FM, the amount of oscillator fequency change is...?
Definition
Directly proportional to the amplitude change in the modulating signal.
Term
The output of the oscillator in a FM modulator increases in frequency with each...?
Definition
Positive half cycle of the modulating signal.
Term
What pupose of Modulation involves teh modulating low frequency signal for transmission over long distances?
Definition
Ease of Radiation
Term
What purpose of modulation prevents interference when sharing the same communication path?
Definition
Channel Allocation
Term
What factor determines the spacing of the sidebads in an AM signal?
Definition
Frequency of the Modulating SIgnal
Term
A 10 KHz modulating signal has produced enough peak voltage to cause a deviation of 30 Khz. What is the modulation index?
Definition
3
Term
What is the formula for determining the modulating index?
Definition
Deivation/Frequency
Term
In PM the carriers phase is hifted at the rate of ...?
Definition
The modulating signal.
Term
By using 16PSK how many bit combinations are allowed to be used?
Definition
4
Term
How does Synchronous transmission reduce overhead costs of data transmission?`
Definition
It blocks many characters together for tansmission
Term
When using VRC, what signifigance does the amount of 1's have in a data bit pattern.
Definition
It determines parity
Term
What 2 error detection methods, when used together are 98% effective in detecting errors?
Definition
VRC & LRC
Term
What error detection method is used for checking a data block greater than 512 & is about 99% effective in most applications?
Definition
CRC(Cyclic Redundancy Check)
Term
When using forward error control as a method of error correction, where dies the error correction take place?
Definition
At the recieving end
Term
What type of buffer allows the fiber optic cable to be twisted or pulled with little stress on the fiber?
Definition
Loose Tube
Term
Angel of...?
Definition
Relflection
Term
Propagation as seen by Snells law is known as...?
Definition
Total Internal Reflection
Term
What Logarythmic expression do we use to specify the ratio of power loss in fiber optic cable?
Definition
Db/Km
Term
What results from imperfection in an optical fiber's basic structure?
Definition
Scattering
Term
What type of fiber is least effeciant & has a core diameter of 30um to over 800um?
Definition
Multimode step-index
Term
Which analog multimet control compensates for the voltage of the internal batteries when calibrating for resistance measurment?
Definition
Zero Ohms Control
Term
When you make a resistance measurment, how do you electrtically isolate a resistor from the circuit?
Definition
Disconnect one side of the resistor
Term
How do you place multimeter test leads in a cicuit ot measure voltage?
Definition
Parallel
Term
In which type of circuit would you measure the AC component of an output voltage where both AC & DC voltage levels exist?
Definition
Amplifier
Term
Which feature of the Fluke 805A Mulitimeter do you use to slect various meausurment functions>
Definition
The Rotary Switch
Term
Which feature of the Fluike 805A locks the meaurment into display for viewing?
Definition
The Touch/Hold puch button
Term
When using the Fluke 805A, which range would you select to measure 50 Volts DC?
Definition
Volts DC
Term
With what values do we measure insulation resistance?
Definition
Ohms/Megohms
Term
Isulation resistance increases if...?
Definition
The insulation thickness increases
Term
When using an PSM-2 megger, how do you know that the proper amount of voltage is being applied?
Definition
Turn the hand crank at a rate that keeps the indicator lights at a steady glow
Term
How are voltage, time, and depth represented on the O-Scope display?
Definition
Voltage=Vertical,Time=Horizontal, Depth=Intensity
Term
Which probe lets you use the O-Scope to measure higher voltage levels?
Definition
10:1 Passive Probe
Term
Smapled Data points are stored into the memory of an O-Scope as...?
Definition
Waveform Points
Term
What type of sampling does an O-Scope normally use on a signle-shot or seldom-occuring signal?
Definition
Real Time Sampling
Term
Which O-Scope button Controls all waveforms displayed in the STORE mode?
Definition
Select C1/C2 Switch
Term
In acquiring a 4K record length, how many samples can you view at one time?
Definition
1000
Term
During a basic BERT procedure an error signal occurs if...?
Definition
Any bit in the recieved signal is different than the generated bit.
Term
What Personell Evaluation is conducted every 6 months?
Definition
Inter-continental Balistic Missile Communitcation
Term
What Evaluation is conductd to make sure technicians meet FAA Requirements?
Definition
Air Traffic Control & Landing Sytems Certification
Term
When is the term not Mission capable Maitenance appropriate?
Definition
When not capable of performing any of thier assigned missions because of uni level maitenance requirements.
Term
Workcenter personell on standby coodinate thier meal/confort breaks with what maitenace staff funtion?
Definition
Maitenance Operations Center
Term
What are the 3 components of Air Force OJT?
Definition
Job Knowledge, Job Proficiency, & Job Experience
Term
What level of Maitenance employs the highest degree of skill?
Definition
Depot
Term
What Maitenance function validates the use of effective training programs, security procedures & good housekeeping standards?
Definition
Quality Assurance
Term
What must QA personell do?
Definition
Privide assitance with technical and Management guidance so staff functions & workcenters can dectect & correct problems in early stages.
Term
What is the minimum amount of months required for 5-level upgrage for traniess who are not in training stautus?
Definition
15 Months
Term
Who develops and maintains System Records of Equipment that are integrarted with the base network.
Definition
Sytems Telecommunications Engineering Managment-Base
Term
What Catagory of Maitenance enables the Chief oF Maitenance to Coordinate & direct the maitenance effort?
Definition
Catagory II
Term
What are the 6 Steps of Operational Risk Managment?
Definition
Identify the hazards, Assess the Risk, Analyze Risk Control Measures, Make Control Desicoins, Impliment Risk Controls, Supervisor & Review
Term
How can multiple individual task assignments be put together for multiple duty positions including additional duties?
Definition
An Individual Training PLan
Term
What ;evel of maitenance has skills not available at the operating levels but not to the extent of tech repair centers?
Definition
Intermediate
Term
When are Senior NCOs required to have OJT records?
Definition
When their skill level is not consummerate with thier grade.
Term
What is the minimum rank to be a task certifier?
Definition
SSgt
Term
What type fo AFSC dhows your highest skill level?
Definition
Primary
Term
What type of AFSC identifies the authorized manning position to which you're assigned & reflects the job your currently performing?
Definition
Duty
Term
What is the minimum rank to be a task certifier?
Definition
SSgt
Term
Who is responsible for the given equipments logistics life cycle?
Definition
Single Manager
Term
What type of AFSC is for use by the personell center for assignement & training purposes?
Definition
Control
Term
If there is a delay in Maitenance actions, who mediates between the operators and maitenance staff?
Definition
Chief of Maitenance
Term
What serves as a unique identifier for tracking maitenance actions for an equipment malfunction?
Definition
Job Control Number
Term
What designates equipment as reportable?
Definition
If the equipment is mission essential
Term
What condition status-code do we not use with a single mission system?
Definition
Partial Mission capable
Term
What do we consider to be a maitenance information system?
Definition
Telephone Managment System
Term
Who is responsible for the operation of the Integrated Maitenance Data System(IMDS)?
Definition
Host Database Manager
Term
What status id the smae as "Estimated time in Comission"?
Definition
Estimated Time of Return to Operation
Term
What Maitenance Staff function coordinates with support agencies & assists maitenance personell by exploiting all supply transactions?
Definition
Material Control
Term
What term has Expandability, Recoverability, Repairability Code (ERRC) of XD of XF?
Definition
Due in from Maitenance
Term
What items are considered upport equipment?
Definition
Automated Self Tests
Term
How many primary AFSCc are in the Communication Electronics carrier field?
Definition
8
Term
How many SMSgt 9-Level positions are in the Communication Electronics Career progression ladder?
Definition
2
Term
What AFSC performs maitenance on fixed and mobile meterological & Navigational aid systems?
Definition
2E1x2 Airfield Systems
Term
When will intial evaluations be done on assigned personell within a workcenter?
Definition
60 days /120 (ANG)
Term
When do personell who are selected to promotion to SSgt enter 7-Level upgrade training?
Definition
1 SEP
Term
How many hours of rest must a supervisor allow for personell?
Definition
8 hours
Term
What Communication Standardization & Evaluation program provides the unit commander, chief of maitenance, and supervisors with factual objective assesments of a sections ability to meet its mission requirements?
Definition
Managerial
Term
What personell evaluation is conducted every 24 months/48 (ANG)?
Definition
Follow On
Term
What are the 3 phases that are evaluated in a personell evaluation?
Definition
Preparation, Task Performance, Post Performance
Term
If a system is to co-exist with an AF LAN, what is requiered before the system can be integrated?
Definition
A certificate of Networthiness.
Term
What personell evaluation is conducted on newly assigned personell within 6 months of assingment to workcenter(12 for ANG)
Definition
Primary
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