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Flashcards in L6 Deck (20):
1

block diagram of transmitter

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2

fill in the following block diagram of transmitter

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3

The following represents

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Block diagram of transmitter

4

PF Carrier Oscillator

produces the radio frequency AC carrier sine wave

5

Voltage amplifier

Amplifies the weak microphone signal in preperation for modulation

6

Modulator

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

7

RF Power Amplifier

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

8

Antenna

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

9

Reciever block diagram

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10

the following represents

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Reciever block diagram

11

Receiver:

Receive Antenna:

Converts incoming radio wave energy into electrical energy

12

Reciever:

Bandpass filter:

Allow desired carrier frequency to pass, rejects all others

13

Reciever:

RF Amplifier:

Amplifies the selected carrier frequency in preparation for demodulation 

14

Detector:

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

15

Audio Power Amplifier:

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

16

Speaker:

Converts the recovered information signal back into sound

17

___________ is necessary for radio frequency

modulation

18

Why modulation is necessary for radio frequency ?

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

19

wavelength:

is the distance that wave travels in one cycle.

λ=v/f

20

How do Changes in frequency affect wavelength ?

As Frequency is increased, wavelength decreases