GROL ELEMENT 3 TERMS

LRU

Line-Replaceable Unit

RADAR

Radar Detection And Ranging

PW

Pulse Width

PPS

Pulse Repetition Rate

SSR

Secondary Surveillance Radar

GDU

Garmin Display Unit

CAN

Controller Area Network

TTL

Transistor-Transistor Logic

RF

Radio Frequency

VOR

VHF Omnidirectional Range

VHF

Very High Frequency (30 - 300 MHz)

HF

High Frequency (3 - 30 MHz)

MF

Medium Frequency (300 - 3000 kHz)

SSB

Single Sideband

DSP

Digital Signal Processing

GSM

Global System for Mobile Communications

RPE

Regular-Pulse Excited

CODEC

Coder-Decoder

SWR

Standing Wave Ratio

F3E

Analog FM Voice

A3E

Standard AM Voice

HSI

Horizontal Situation Indicator

ILS

Instrument Landing System

Ohm's Law

V = IR

DAC

Digital-to-analog Converter

Prescaler Circuit

Divides HF signals so LF counter can read

DSC

Digital Selective Calling

TCAS

Traffic alert and Collision Avoidance System

SELCAL

Selective Calling

EPIRB

Emergency Position-Indicating Radio Beacon

SART

Search And Rescue Transponder

SCT

Survival Craft Transponder

ITU

International Telecommunication Union

FEC

Forward Error Correction

STC

Supplemental Type Certificate

FCC

Federal Communications Commission

FAA

Federal Aviation Administration

TSA

Transportation Security Administration

J3E

SSB Suppressed Carrier Telephony (Requires a BFO [Beat Frequency Oscillator] for receipt)

UHF

Ultra High Frequency (300 MHz - 3 GHz)

DME

Distance Measuring Equipment

or

Designated Maintenance Examiner

ADS-B

Automatic Dependent Surveillance-Broadcast

RSE

Reserve Source of Energy

SARSAT

Search And Rescue Satellite-Aided Tracking

TELEX

Text-based or written radio communication

RS-232

Recommended Standard 232. Legacy standard for serial data transmission

ARINC-429

Aeronautical Radio, Incorporated 429

One Transmitter, Many Receivers

AND Gate

Produces “1” if all inputs are logic “1”

NAND Gate

Produces “0” when all inputs are “1”

OR Gate

Produces “1” if any output is “1”

NOR Gate

Produces “0” if any input is “1”

NOT Gate

Produces “0” when input is “1” and vice versa

Flip-Flop

Bi-stable multivibrator circuit

PFD

Primary Flight Display

MFD

Multi-Function Display

IFD

Integrated Flight Display

LOC

Localizer

GPS

Global Positioning System

ADAHRS

Air Data, Attitude and Heading Reference System

WAAS

Wide Area Augmentation System

Correction System for GPS, from 10m to >1m variance for ILS, etc.

VFR

Visual Flight Rules

IFR

Instrument Flight Rules

CFI

Certified Flight Instructor

DAR

Designated Airworthiness Representative (14 CFR § 183.33)

DER

Designated Engineering Representative (14 CFR § 183.29)

CFR

Code of Federal Regulations

14 CFR Part 1

Definitions and Abbreviations

14 CFR Part 21

Certification Procedures

14 CFR Part 23/25

Airworthiness Standards for Normal (Small) and Transport (Large) category airplanes

14 CFR Part 43

Rules for Maintenance, Preventative Maintenance, and Alterations

14 CFR Part 61

Certification requirements for pilots, flight instructors, and ground instructors.

14 CFR Part 65

Certification requirements for non-flight crew airmen (ATCs, A&Ps, repairmen, dispatchers).

14 CFR Part 91

General Operating and Flight Rules

14 CFR Part 107

Regulations for small unmanned aircraft systems (drones)

14 CFR Part 121

Operating requirements for Scheduled Air Carriers (commercial airlines)

14 CFR Part 135

Operating Requirements for Commuter and On-Demand operations (charter flights)

14 CFR Part 145

Certified Repair Stations

A&P

Airframe and Powerplant (certified mechanic)

IA

Inspection Authorization

A “senior" A&P who has held license for at least 3 years and passed an additional exam

GDL

Garmin Datalink

GAD 29

Garmin Adapter 29 (most common data business converter)

GIA

Garmin Integrated Analyzer

Mainly used for G1000 integrations

AWG

American Wire Guage

ADF

Automatic Direction Finding

14 CFR § 91.413

ATC transponder tests and inspections

14 CFR § 91.411

Pitot-Static Tests

ATCRBS

Air Traffic Control Radar Beacon System

TDR

Time-Domain Reflectometer

A combination of an oscilloscope and a pulse generator used to measure the characteristics of transmission lines

TDMA Radio

Time Division Multiple Access Radio

ARQ

Automatic Return Request

SITOR

Simplex Teletype Over Radio

NMEA 2000

High Speed Data Serial Network, newer than RS-232

National Marine Electronics Association

Inductive Reactance of a coil if frequency and coil inductance.

XL = 2πfL

Two most common specifications for a junction diode

Maximum forward current and Peak Inverse Voltage (PIV)

SCR

Silicon Controlled Rectifier

TRIAC

Triode for Alternating Current (Two SCRs connected back-to-back)

FET

Field-Effect Transistor

CMOS

Complementary Metal-Oxide-Semiconductor

MOSFET

Metal-Oxide-Semiconductor Field-Effect Transistor

MCU

Microcontroller Unit