Mod 5 Flashcards by Sam Lockwood

EIDS stands for?

A- Electronic Instrument Data System
B- Electronic Instrument Display System
C- Electronic Identification Data System

EIDS -

B- Electronic Instrument Data System

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Advantages of EIDS

Variability and Variety

Coloured Displays

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How are parameters fed via EIDS?

3 ways

Via Display Data Buses to CPU Controlled CRT or LCD

Via Digital Data buses to a printer for a hard copy printout

In digital form to a radio transmitter, which sends Data to ground

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How are EIDS arranged?

A- Basic I
B- Basic H
C- Basic T

C- Basic T

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How are the EIDS monitors brightness controlled?

A- Control Knobs and brightness of sunlight
B- They can not be altered
C- Overhead push switches

A- Control Knobs and brightness of sunlight

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What is the disadvantage of EIDS compared to Analogue systems?

A- They are harder to understand
B-Difficult to read indications in bright sunlight
C- Can’t contain as much information

B- Difficult to read monitors in bright sunlight

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What does ECAM stand for?

Electronic Centralised Aircraft Monitoring

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What does FDRS stand for?

Flight Data Recording System

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What does CMS stand for?

Central Maintenance System

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What does ACMS stand for?

Aircraft Condition Monitoring System

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Minor Troubleshooting uses what and how?

ECAM and CMS through MCDU’s and generated reports (printed or ACARS downlinked)

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In depth troubleshooting uses what and how?

Uses ACMS and CMS through MCDU and printed reports

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Long term maintenance uses what and how?

ACMS and FDRS through printed, ACARS downlinked and downloaded reports or tapes

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MSD stands for what and is located where?

Most Significant Digit located far left

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LSD stands for what and is located where?

Least Significant Digit located far right

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Positional Notation labels its digits as?

Value or Weight

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What is the point called in a Binary Fraction?

Binary Point

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How does the DFDAU recognise its location on different Aircraft types?

Decodes Ident discretes

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How many Discretes on an FDAU?

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What is the EEC Programming Plug also known as?

Data Entry Plug

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What is the EEC Plug part of?

The Engine

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How is the EEC Plug pin programmed?

Binary specific to an individual engine serial number

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What is the EEC Plug required for?

ACMS printed reports

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What is the largest Digit of a numbering system?

One less than the base

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What does FADEC use to assist with Troubleshooting?

Maintenance Data Storage and retrieval system

When does the FADEC system store when engines are running?

In flight faults and flight conditions together with environmental conditions

When is the FADEC Maintenance system activated on ground?

Selection on the maintenance panel of the BITE display mode

What's displayed on the ECAM when BITE display mode is selected?

Maintenance words encoded from non-volatile memory and the delta corresponding memory

What is Binary Coded Decimal most convenient for?

Computers

What does ALU stand for?

Arithmetic Logic Unit

What form of inputs does an ALU require? A-Analogue B-Digital

B-Digital

Three most common Logic Circuits?

Inverter AND OR

What is an Inverter also know as?

Boolean Complement

When will a Diode Logic Minimum Circuit produce a positive Logic?

When all of the Logics are positive

When will a Diode Logic Maximum Circuit produce a positive Logic?

If one or more of the inputs is Positive Logic

What does DTL stand for?

Diode Transistor Logic

What are the 2 types of DTL?

NAND and NOR

What does RTL stand for?

Resistor Transistor Logic

What are the 2 types of RTL?

NAND and NOR

What does ECL stand for?

Emitter Coupled Logic

What does TTL technology use?

Transistors at the inputs with several emitters

Why are there diodes at the inputs of TTL

To protect the inputs from excessive voltages

Where are TTL's only available?

Integrated Circuits (IC's)

What are WIRED AND and WIRED OR also called?

DOT AND and DOT OR

What happens if you switch the outputs in Parallel in a Logic Circuit?

It destroys the electronic devices

How can you switch the output parallel on a WIRED-AND or WIRED-OR circuit?

If you connect it in an OPEN COLLECTOR arrangement

When is parallel switching called WIRED-AND?

When the 0 signal is dominant (TTL)

When is Parallel switching called WIRED-OR?

When 1 signal is dominant (ECL)

What rule are codes determined by?

Determined Input combinations will be converted to determined output combinations

What is an Assessable Code?

If every single Bit has a value

What is an Unassessable code?

Code that bits do not have a certain value. The Bit pattern itself gives the data word

Give examples of Assessable codes

Symmetric 8421 Unsymmetrical 2421 Aiken Code

Give an example of an Unassessable code

3XS Code

What is a disadvantage of 8421 Code?

All bits could be 0 which means you can't see any defects

What numbers do the Aiken Code use?

First 5 (0-4) and last 5 (11-15) options of binary code

What codewords do the 3XS code use?

Numbers 3-12 from the binary code

What is an advantage of 3XS Code?

Under no circumstances are all bits 0 or 1

What is a single step code?

One that from one decimal step to the next, only one binary bit changes its value

Why do we use single step code?

In case of mechanical inaccuracies, no faulty information can be generated when switching from one number to another

Give examples of single step code

Gray Code Libaw-Craig Code Gilham Code

What is Gilham code used for?

ATC systems on old Aircraft

What is the altitude encoded in on the Gilham Code?

100 FT

Where is the Gilham Code generated?

Altimeter or analogue ADC

What is ASCII Code?

American Standard Code for Information Interchange

Give examples of ASCII code

ISO Alphabet No.5 CCIT Code 5 7 Bit Code DIN 66003

What is ASCII Code used for?

Used to transfer Alpha-Numeric Data as words, text messages and processor commands

Name 3 code converters

Encoder Converter Decoder

What does an Encoder do?

Converts Input message with a greater number of bits to an output message with a lower number of bits (Increasing the base)

What does a Converter do?

A converter code converts one code to another with identical number of bits

What does a Decoder do?

A decoder converts an input with a lower number of bits to an output with a larger number of bits (decreasing the base number)

What does a Comparator do?

Compares two words to check if they are Equal

What does a comparator do if words are not equal?

Find out which word value is higher than the other

What does a comparator depend on to compare 2 codes?

They must both be Assessable and be the same code type

What is a priority Circuit used for?

Used to rank different inputs based on priority

What can happen during transportation of digital data information?

Can be changed by external influences between the receiver and transmitter

How can you identify if a fault has been induced into digital data information between a receive and transceiver?

Parity generator

What can be used to set a Fault status at the receiver end?

Parity Controller

What is a Karnaugh-Veitch Diagram used for?

To optimise digital circuitry and the amount of necessary gates

What are discrete inputs?

Open/Ground or Open/28V

What does a Multiplexer do?

Device which combines several inputs into a single output

What is a demultiplexer?

A device which takes data from one source and distributes it to several outputs

What is the output of a multiplexer and demultiplexer dependant on?

The Address lines

What is the previous state of a Storage device called?

Internal State

What is 't=tm'?

Point where input variables are changed but internal states and output state are unchanged

What is 't=tm+1'?

New input states change the internal states and the output state

What are the 2 types of memory?

Static and Temporary

What is static memory also known as?

Bistable sweep stage

What is temporary memory also known as?

Mono-astable sweep stage

What does Static memory (bistable sweep stages) depend on?

Input stages and History of input stages

What does Temporary memory (mono-astable memory) depend on?

Input state, history of input state and time

What type of arrangement is a flip flop?

Storage Device - Bistable sweep stage (static memory)

What properties must a storage device have?

Store, set and reset(clear)

What's the condition where both outputs of a SR Flip-Flop are 1 at the same time?

Irregular state (forbidden or restricted)