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38 Cards in this Set
- Front
- Back
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If an analogue signal has a 10khz bandwidth, what frequency should it be sampled at? |
20khz |
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Difference between accuracy and resolution? |
How close the measures value is to true value. Ability to respond to small changes in input |
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How do you calculate resolution? |
Maximum value voltage ÷ Possible counts |
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What device is used for sending/recieving serial data? |
Multiplexer/demultiplexer |
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How is the data word label written differently? |
Reverse order in octal |
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In an ARINC 629 message format, how many bits are in each label and data word? |
20 |
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In Manchester bi phase, how do you achieve a logic 1 and 0? |
High to low for 1. Low to high for a 0 |
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What does OPAS stand for? |
Overhead panel arinc system |
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What is positive and negative logic? |
Pos (1=High 0=low). Neg (1=Low 0=high) |
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Describe an ex or gate |
Mixed inputs give a 1. Same inputs give a 0 |
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Name the 3 different busses in a digital computer |
Data bus, address bus, control bus |
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Difference between kb and KB |
Kilobits....1024bits. Kilobytes 8 bits In a byte |
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What 4 systems does the fmc receive from? |
Flight control computer(FCC). thrust management computer (TMC). digital air data computer (DADC). eningine indicating and crew alerting system (EICAS) |
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Where would you find type a fibre optic connectors? |
Usually on production breaks. |
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Where would you find type b fibre optic connectors? |
On LRU's |
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Most common type of fibre optic splice? |
Fusion splice |
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How many volts does it take to damage circuitry? |
30volts |
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What material are the ESD bags made of? |
Quasi conductive |
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What details that the safety aspects of airborne software comply with for airworthiness requirements? |
AMC 20-115C |
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How many software levels are there? |
5 |
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What are the basic 6 instruments |
Airspeed indicator, altimeter, gyro horizon unit, direction indicator, vertical speed indicator, turn and bank indicator |
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What instruments make the basic T |
Attitude direction indicator(ADI), horizontal situation indicator (HSI), combined speed indicator (CSI), altimeter |
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What did the EADI develop into? |
PFD. Primary flight display |
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What did the EHSI develop into? |
ND. Navigation display |
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What does the EADI display? |
Attitude, flight director, pitch angle, roll angle, runway, glideslope, localiser(ILS), radio altitude, decision height, ground speed |
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What does the EHSI display? |
Heading, course, deviation, drift, vor, adf, elevation, ground speed |
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How many flight phases are there on ECAM? And how many aircraft system displays? |
7. 12 |
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What does RVDT and LVDT stand for? |
Rotary variable/linear variable differential transformer |
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In fly by wire. How many ELAC's, SEC's, and FAC's are there? |
2, 3, 2 |
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What are the 4 different levels of redundancy available in the pitch system, |
Normal control system, alternate control law, direct control law, mechanical backup |
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What are the four main functions of an FMS? |
Automatic flight control, performance management, Navigation and guidance, Status and warning displays |
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What four phases of flight are there for performance modes? |
Take off, Climb, Cruise, Descent and approach |
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NAV and PROF may be used together via the FMP. What controls What? |
Lateral guidance, Vertical guidance |
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The outputs of the IRS are integrated twice. What will each integration give? |
Velocity. Then distance travelled |
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How long does the FDR record? |
25hrs |
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FDR switches on at fuel valve opening for a/c. When does it switch on for Rotary? |
During rotor brake off |
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What must happen to the IRS before flight? |
10 mins to allign |
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What can be used to check the IRS? |
GPS |
