Flashcards in Vol 2 Self Test Deck (107):
Why was 1553 developed?
Provide a standard for a communications bus
Why use the bus standard? What was the benefit?
Limit point-to-point cabling. Lower weight.
What factors are the serial transmission rate of the 1553 based upon?
Reliability, electrical interfaces, and hardware capabilities
What makes 1553 deterministic?
What type messages make up typical 1553 system command?
BC to RT, RT to BC, and RT to RT
What are mode codes?
BC commands that provide network management
Requirements for multiple bus architecture?
BC functionality for each bus
Four components in a CPU?
Control unit, arithmetic/logic unit, internal memory, I/O controllers
Primary unit of any information system?
What are microchips made from, how does current pass through them?
Silicon and transistors, transistors form circuits
When can silicon be used to conduct electricity?
Once it's been treated with chemicals
Why are labs that make circuits clean?
Keep dust out of circuits
What controls the speed of a computers activities?
Why different kinds of chips? Where can chips be mounted together?
Specialized purposes. Printed circuit boards
How many signals are in the code used by a computer and what are the codes?
ON and OFF
What are transistor switches called? What are different kinds based on?
Gates. Logic conditions.
What determines the number of I/O devices on a computer system?
Design of particular system, type of computer used
What happens once the control unit decodes commands and synchronizes a device with the data processing system?
Input reader reads info > data converted to computer code > xmitted to main storage area
What determines the storage location where data is either entered or where it will be taken?
What component of a computer supervises how the entire information system functions?
Where are all the computer calculating, sorting, and comparing of data accomplished?
What are the temporary storage areas in an ALU called?
What links a computer to the outside world?
What controls how the computer system accesses I/O devices?
Why I/O controller increase processing speed?
Simultaneous I/O operations
What function does a channel perform and how does it operate with the CPU?
Manages I/O control unit independent of CPU
Purpose of buffering system?
Provide an overlap of operations
What bits? Bytes?
1s and 0s. 8 bits
How much can each primary memory location store?
One data value
Two types of primary memory?
ROM and RAM
What type of memory is essentially unlimited?
Computer file cabinet?
What happens to all data that is processed when it passes through main storage?
Furnished to an output unit
Random access unit? Sequential?
CD. Magnetic tape
What's the heart of a computer display?
Why must the CRT electron gun sweep the screen 60 to 70 times per second?
Phosphors don't glow
What display resolution?
Number of pixels that make image
How many pixels on a CGA?
Link computers and provide shared access
Define Internet protocols
Suite of communication protocols
What signal repeater do?
Regenerates radio signal
What is a router and how does it function?
Figure out what to do with IP packets
What is RAID?
A way of storing data by splitting it into different places
How does the data striping technique work?
Break into blocks and put blocks in different spots
Striping, no redundancy
Solely data mirroring
Describe insulated wire construction features and explain the need for stranded conductors
Metal conductor covered in dielectric. Dielectric insulation, thermal protection, abrasive resistance, moisture resistance
Describe the shielded cable construction features.
Metallic braid over insulation to provide barrier against EMI
Describe coaxial cable construction features and purpose
Inner/outer conductor, carry RF power
Describe the EMP hardened cable construction features and use
Braided shield, laminated copper-foil tape wrap, second braided overall shield
Describe the protective layers of an EMP cable
Connect EMP hardened components
What part of an EMP cable can be repaired in the field?
First two layers and a jack or connector
What are the two parts of an electrical connector? How is the electrical connector coupled?
Receptacle/plug assembly. Using a coupling device
What part of an electrical connector is usually the fixed part?
How are pin-and-socket contacts connected to the wires?
Soldered or crimped
Which side of a connector/circuit should be the hot side?
What problems can occur if you don't adhere to the design dimensions of an RF connector?
Added losses to RF power
Major factor when using fiber instead of conventional wire cables?
Why important to control the stress and forces exerted on a fiber optic cable?
Prevent loose or uneven stranding
In what areas do the military use fiber cables?
Military vehicles, high-end electronics
Key advantage of fiber in military vehicles?
Multiplexing a number of signals into a common bus
Advantages of fiber over copper?
Security advantage of fiber?
What's a common use of fiber optic cable?
What's a transmitter's central part and is considered an active component in a fiber optic communication system?
LED or Laser Diode
What happens when you point lasers at your eyes?
See tihngs REELY good and fast
What part of fiber system converts optical energy back into electrical?
What two types of detectors are used in fiber optic systems?
Why are exact dimensions necessary when stripping wire with wire strippers?
Ensures proper connection
Why rosin solder over acid core?
Rosin doesn't corrode
Explain a high-resistance solder connection
Too much solder between connectors = solder flows = loose
Fist step in soldering joints?
Tin the wires
What could be the consequences of using too much solder?
Why not allow soldering iron to get too hot?
Overheated iron quickly loses its tinning
Purpose of terminal lug?
How use splice?
Insert > crimp
What makes connector plugs connections more reliable?
Crimped to wire
Explain purpose of crimping tools and why it's important to crimp a connector properly
Not too loose/tight
How know use right insertion/extraction tool?
Use data plate on tool
How insertion tool work?
Spread it, put it in
How does H2-900B heating tool work?
Stream of nitrogen through electrically heated element
When using heating tool, what determines the correct air temperature and pressure?
Policies and directives
Under what four inspection concepts are Air Force aircraft inspected?
Periodic, phase, isochronal, programmed depot Mx
The periodic inspection is more extensive than what two other inspections?
Hourly post flight, basic post flight
What is a phase inspection and why are they performed?
Basic/hourly post flight + periodic get combined into small packages
How long is preflight on AC conducting airline type operations valid?
22, 28, or 72 hours
How many hours before a cargo AC used for airlift ops requires preflight?
When basic post flight? What does it determine?
Last flight of flying period. Suitable for another flight
When jet is released by operations
BPO more thorough than these two
When hourly post flight? What does it augment?
After specified number of hours. Augs basic post flight
Inspections peculiar to the isochronal inspection concept?
Major, minor, home station
When is a major inspection due? What does it consist of?
Number of calendar days. Everything not normally checked
What is a minor inspection?
Check certain components
Requirements of an HSC?
When returns from a long range mission, or expiration of short calendar
What preventative Mx?
Normal upkeep and preservation
What is scheduled Mx?
Mx that can be programmed
What is unscheduled Mx?
Who has responsibility of performing operator inspections?
What directs when special inspections are performed?
TCTOs, MajComs, local directives
When are periodic inspections and lubrication requirements accomplished?
Specific number of power on hours, expiration of calendar period
What is the purpose of an acceptance inspection?
Who performs the transfer inspection if more than 72 percent of the inspection interval has elapsed?
Basic elements of a FOD prevention program?
Training, housekeeping, tool control, control of personal items, control of hardware/consumables, incident investigation/reporting, hazardous material control
What on 781A to indicate tool accountability?
Tool and FOD check complied with