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basic electronics for met > L6 > Flashcards

L6 Flashcards

1
Q

block diagram of transmitter

A
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2
Q

fill in the following block diagram of transmitter

A
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3
Q

The following represents

A

Block diagram of transmitter

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4
Q

PF Carrier Oscillator

A

produces the radio frequency AC carrier sine wave

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5
Q

Voltage amplifier

A

Amplifies the weak microphone signal in preperation for modulation

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6
Q

Modulator

A

Impresses the amplified intelligence signal onto the carrier signal from the oscillator

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7
Q

RF Power Amplifier

A

Provides power gain to the modulated RF carrier signal for driving the antenna (and overcoming path loss)

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8
Q

Antenna

A

Converts the electrical energy from the power amplifier into electromagnetic energy (a radio wave)

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9
Q

Reciever block diagram

A
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10
Q

the following represents

A

Reciever block diagram

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11
Q

Receiver:

Receive Antenna:

A

Converts incoming radio wave energy into electrical energy

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12
Q

Reciever:

Bandpass filter:

A

Allow desired carrier frequency to pass, rejects all others

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13
Q

Reciever:

RF Amplifier:

A

Amplifies the selected carrier frequency in preparation for demodulation

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14
Q

Detector:

A

Recovers a copy of the original information signal from the amplified RF carrier

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15
Q

Audio Power Amplifier:

A

Provides both voltage and current gain so that a speaker can be driven

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16
Q

Speaker:

A

Converts the recovered information signal back into sound

17
Q

___________ is necessary for radio frequency

A

modulation

18
Q

Why modulation is necessary for radio frequency ?

A
  1. Antenna lengths can be reasonable
  2. Stations can be separated from each other
19
Q

wavelength:

A

is the distance that wave travels in one cycle.

λ=v/f

20
Q

How do Changes in frequency affect wavelength ?

A

As Frequency is increased, wavelength decreases

basic electronics for met (6 decks)

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