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Flashcards in Electronic Systems Deck (33):
1

What does a continuity test do?

Makes sure there's no breaks or shorts in the wire

2

What does a digital multimeter measure?

Voltage, amperage, and resistance ohms and diode check
A TDR identifies how far in feet a break in the wire is

3

What is the pitot static system?

Pitot static tube
3 indicators
Altimeter
Rate of climb
Airspeed indicator
Each indicator operates on air from outside the aircraft

4

Altimeter

Altitude of the aircraft

5

Airspeed indicator

Speed of the aircraft

6

Rate of climb indicator

How fast the aircraft is climbing or descending

7

Barometric Altimeter

Reads altitude from sea level

8

Radar altimeter

Altitude from terrain
Range of 0 to 5000 feet
Accuracy of +3ft or +4% whichever is greater
0 to 1050 indicated on FD

9

Doppler Effect

Change in frequency of a received signal cause by relative motion

10

TDP

Tactical Data Processor

11

CDU

Control display unit

12

DCP

Display control panel

13

MFD

Multi function display

14

HUD

Heads up display
Used with NVG goggles
Provides flight parameter info through NVGs

15

CSC

Communications system control

16

DALS

Downed aviator locator system
Locks on signal from PRC-112 gives direction of flight and distance to find downed aircrew

17

IFF

Identification friend or foe
Replies to interrogations from other aircraft or ships
Respond only capability for H-60
Five modes
Mode 4 military use only

18

DAFCS

Digital automatic flight control system

19

HSVD

Horizontal situation video display
Primary flight instruments display

20

HF

High frequency

21

UHF

Ultra high frequency

22

VHF

Very high frequency

23

ARI

Azimuth Range Indicator

24

Active sonar

Transmitter sends out signal and listens for return sound waves

25

Passive sonar

Transmitter listens for noise only

26

Azimuth

Target clockwise angular displacement in the horizontal plane with respect to true north

27

Range

Distance of target from transducer

28

MDL

Mission data loader
Programmable data cartridge for flight plans

29

AI

Attitude Indicator
Displays artificial horizon

30

MWS

Missile warning set
Ecm unit designed to protect helicopters against surface to air and air to air missiles
Detects missile fired and provides warning message through the indicator and APR-39

31

LDS

AN/AVR-2 a Laser Detecting Set
Frequency extension of the APR 39
Shares 3 of the 10 RSDS weapons replaceable assemblies
Detects and displays info concerning laser environment around the aircraft

32

FLIR

Forward looking infrared
Provides real time infrared and daylight imagery for a variety of missions
Target detection and recognition
SAR
Surveillance

33

What is a thermocouple?

Junction of two dissimilar metals that produce voltage when heated