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PPL Communications > Radio Basics and Equipment > Flashcards

Radio Basics and Equipment Flashcards

1
Q

Hierarchy of high frequencies?

A

High
Very High
Ultra High
Super High
Extra High

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2
Q

What is the highest bracket of frequencies?

A

Extra High (EHF)

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3
Q

What is the second highest bracket of frequencies?

A

Super High (SHF)

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4
Q

Extra and Super High Frequencies operate with what unit of frequency?

A

Giga-hertz

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5
Q

What is the VHF’s bracket of frequencies?

A

30 - 300 MHz

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6
Q

What is the protected range of frequencies for aviation?

A

118.000 to 136.975 MHz

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7
Q

What term is given to the range of VHF and other associated frequencies?

A

Line of sight

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8
Q

What two faactors prohibit/restrict VHF etc?

A

Curvature and terrain

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9
Q

Line of sight formula?

A

1.23 x Square Root of Altitude Difference

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10
Q

Most tower and approach frequencies have what lateral range?

A

25nm

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11
Q

Tower frequency ranges?

A

25nm
4000ft

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12
Q

Approach frequency ranges?

A

25nm
10,000ft

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13
Q

What term describes the range of frequencies published in the AIP?

A

Designated Operational Coverage

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14
Q

What does DOC stand for?

A

Designated Operational Coverage

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15
Q

Designated Operational Coverage can be found where?

A

AIP

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16
Q

What weather factor affects DOC?

A

Tropospheric ducting

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17
Q

Tropospheric ducting increases frequency ranges typically during what weather?

A

Anticyclonic (causing temperature inversions)

18
Q

Basics of tropospheric ducting?

A

Colder denser air on the ground slows waves down
Warmer less dense air above (caused by high pressure) means wave curves downwards in terms of range

19
Q

ILS frequencies operate in what bracket?

A

108.000 to 111.975 MHz

20
Q

VOR frequencies operate in what bracket?

A

112.000 to 117.975 MHz

21
Q

What operates in 108.000 to 111.975 MHz?

A

ILS

22
Q

What operates in 112.000 to 117.975 MHz?

A

VOR

23
Q

On a volume knob, how is squelch usually turned off?

A

By pulling the knob out

24
Q

Pulling a volme knob outwards typically does what?

A

Turns the squelch off

25
Q

What is side-tone?

A

Hearing your own voice during transmission

26
Q

Hearing your own voice during transmission is given what term?

A

Side-tone

27
Q

What numbers on the readability scale are acceptable?

A

4 and 5

28
Q

When conducting a radio check, what must be included?

A

The frequency and ATSU name

29
Q

The frequency and ATSU name should be transmttted when performing what?

A

A radio check

30
Q

What is VOX?

A

Voice-operated transmit

31
Q

Voice-operated transmit is known as what?

A

VOX

32
Q

When should squelch be set to minimum?

A

When setting up the radio

33
Q

When setting up the radio, what should be done on the radio pane;?

A

Squelch should be set to a minimum

34
Q

What is the most basic kind of radar?

A

Primary Surveillance Radar (PSR)

35
Q

What frequency does an SSR operate at?

A

UHF

36
Q

What sends a UHF signal in an SSR system?

A

The transponder

37
Q

A transponder willl only transmit a squawk in what mode?

A

Mode Alpha

38
Q

Mode Alpha means a transponder will only transmit what by UHF?

A

The squawk code

39
Q

AIP ENR recommends that Mode C should be downgraded to Mode A when the transponder and altimeter indicate a difference of what?

A

200ft

40
Q

If your transponder altitude difference is greater than 200ft and you can’t downgrade to Mode A, what would you normally be advised to do?

A

Squawk 0000 to indicate transponder malfunction

41
Q

What is the aerobatic conspicuity code?

A

7004

42
Q

What does squawk code 7004 represent?

A

Aerobatic conspicuity code

PPL Communications (10 decks)

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