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Follow on > Block 4 > Flashcards

Block 4 Flashcards

1
Q

of times something occurs in agiven period

A

Frequency

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2
Q

Distance between two crests

A

Wavelength

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3
Q

Wave of Energy that broadcasts as a periodic disturbance

A

Electromagnetic wave

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4
Q

Radio Frequency Interference Range

A

20kHz to 300GHz

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5
Q

Sources of Radio Frequency

A

Transmitters and Electrical Equipment

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6
Q

Propagation of EMW’s

A

Electromagnetic Radiation

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7
Q

Speed of Light

A

186,000 m/s

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8
Q

Methods of Combating RFI

A
  • Design and Construction
  • Frequency Hopping
  • Antennas
  • Shielding
  • Software
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9
Q

Radio Waves

A

100s m - < 1 cm

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10
Q

Microwaves

A

30cm to 1mm

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11
Q

Infrared

A

1mm to 700nm

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12
Q

Visible

A

700nm to 400nm

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13
Q

Protects against nuclear explosive hazards

A

Nuclear Hardness

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14
Q

What airplane uses Nuclear Hardened Cables?

A

B52H

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15
Q

Designed to route EMP to SV

Braided Wire w/ copper shielding

A

Nuclear Hardened Cable

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16
Q

Problems with Nuclear Hardened Cable

A

Cost
Weight
Extra Care for components

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17
Q

Every opening is protected w/ EMP Device

A

Hull-Hardening

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18
Q

What aircraft uses Hull Hardening?

A

B1

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19
Q

What symbol identifies the entire procedure or only certain tasks

A

HCP

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20
Q

What Job Guide is used for Maintenance/Inspection

A

T.O. 00-1

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21
Q

What is used to test for resistance?

A

Bonding Meter

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22
Q

What is the limit for the Bonding Meter? What must the voltage be?

A

15 Milliohms

< 1 Volt

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23
Q

What finish is Corrosive, translucent brass color, Damage is unacceptable

A

AA Finish

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24
Q

Conductive finish, dimpled appearance, damage less than 0.0625 is acceptable

A

KA Finish

25
Q

Between Hull, doors, panels, and Hull mounted structures

A

EMP Gasket

26
Q

Most critical phase

A

Inspection Phase

27
Q

What Data bus is used in Legacy Systems

A

MIL-STD 1553A

28
Q

What data bus is most common

A

MIL-STD 1553B

29
Q

What bus uses Fewer IU’s

A

MIL-STD 1553B

30
Q

How is the format of traffic in the 1553B

A

Bi-directional

Half Duplex

31
Q

Controls the flow of info

A

Bus Controller

32
Q

Responsible for the command-response

A

Bus Controller

33
Q

Back-Up Bus Controller

A

Take bus controller in the event of primary bus failure

34
Q

What is capable of bus control functions

A

Remote Terminal

35
Q

Transfers data to and from the bus

A

Remote Terminal

36
Q

How many Remote Terminals are on a single bus

A

31

37
Q

What component is strictly Passive and only receives data but will not transmit

A

Bus Monitor

38
Q

Records all selected traffic which can be analyzed later such as Flight Testing, System Integrity, and Maintenance Analysis

A

Bus Monitor

39
Q

Physical Pathway or medium used in transferring data

A

Data Bus

40
Q

Contains a twisted shielded pair wiring

A

Data Bus

41
Q

What component converts/translates info to and from the bus

A

Interface Unit (IU)

42
Q

What IU assembly is bidirectional and provides data bus decoding

A

Modem

43
Q

What IU assembly is the interface between the modem and CPU?

A

Handshaker

44
Q

What IU assembly sequences all interface operations and controls all internal IU operations

A

CPU

45
Q

What memory stores all IU operational info and is non-volatile

A

PROM

46
Q

What memory is used for temporary storage of data transmissions

A

RAM

47
Q

What is the power application and is not always required

A

Oscillator

48
Q

Total opposition to AC current flow

A

Impedance (Z)

49
Q

Physical connection to data bus

A

Stubs

50
Q

The method of stubs that is short and 1ft

A

Direct Coupled

51
Q

The method of stub that is long and is 20ft

A

Transformer-coupled

52
Q

How many computer words are there

A

20
3 sync
16 Data
1 Parity

53
Q

What is used for internal testing and data error detection

A

Bit Parity

54
Q

Coding format used in 1553

A

Manchester Bi-Phase words

55
Q

Causes data to arrive and transition either too early or too late

A

Mismatched Impedance

56
Q

Only transmitted by Bus Controller

A

Command Word

57
Q

Transmitted by the Bus Controller and Remote Terminal

A

Data Word

58
Q

Only transmitted by remote terminals

A

Status Word

59
Q

Requests status words from all RT when bus is not transmitting traffic

A

Polling

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