Comms Flashcards

1
Q

What frequency has a periodic time of 10ms

A

100Hz

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2
Q

What is the wavelength of 60Hz

A

5M

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3
Q

What is the audio frequency range

A

300 Hz to 3 KHz

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4
Q

What are the characteristics of a series resonant circuit

A

Maximum current, minimum impedance

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5
Q

How would a series resonant circuit behave if frequency was reduced below fo

A

Like a capacitor

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6
Q

What us the Q factor ratio

A
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7
Q

How do you calculate wavelength

A

300000000/frequency

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8
Q

Audio frequency

A

300hz-3KHz

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9
Q

HF frequency

A

3MHz-30Mhz

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10
Q

VHF fequency

A

30Mhz-300Mhz

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11
Q

Marker frequency

A

75MHz

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12
Q

ADF frequency

A

200Khz-1750Khz

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13
Q

VOR frequency

A

111.95 Mhz-118Mhz

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14
Q

LOC frequency

A

108Mhz-111.95Mhz

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15
Q

Glideslope frequency

A

329.3Mhz-399.95Mhz

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16
Q

What does the selectivity of a resonant circuit depend on

A

The slope or steepness of the curve

17
Q

What are resonant circuits used for

A

Selective amplification, muting or transformation of frequencies

18
Q

What is the basic frequency determining element of an AM transmitter

A

The oscillator

19
Q

What’s the main advantage of 2 out of 5 code

A

It’s instantaneous

20
Q

Which part of ARINC429 is the check bit

A

32nd bit

21
Q

What is AC voltage superimposition

A

When the AC voltages are all influenced in the same way