Receiver Principles

Question 0

3 main requirements of an efficient receiver?

Answer 0

Select, extract, produce

Question 1

Define purpose of a receiver

Answer 1

Converts EM energy into usable energy and outputs a reproduction of the original signal

Question 2

4 main receiver characteristics?

Answer 2

Sensitivity, selectivity, stability, noise

Question 3

What am I? Carrier signal, in it’s raw state carries no information?

Answer 3

RF or carrier

Question 4

What am I? Intermediate step in reception and production of an audio freq?

Answer 4

IF

Question 5

Range of audible frequencies?

Answer 5

20Hz to 20000Hz

Question 6

The method of producing an audio frequency by mixing two waveforms together is known as?

Answer 6

Heterodyning

Question 7

What does a receiver use to select the wanted signal, whilst rejecting others?

Answer 7

Filter

Question 8

Name the filter. Passes all freq below selected freq and rejects all freq above.

Answer 8

Low pass filter

Question 9

Name the filter. Passes all freq above selected freq and rejects all freq below

Answer 9

High pass filter

Question 10

Passes all freq within band and rejects all freq above and below band

Answer 10

Band pass filter

Question 11

Name the filter. Passes all freq above and below band, rejects all freq within band

Answer 11

Band reject filter

Question 12

Name the filter. Band reject filter with very narrow stopband

Answer 12

Notch filter

Question 13

Name the terminology. Frequencies that are retained by the filter, and will appear in output signal.

Answer 13

Passband

Question 14

Name the terminology. Frequencies that are removed by the filter, and do not appear in output signal

Answer 14

Stopband

Question 15

By definition, ……….. is the ratio of output to input power, usually measured in Db

Answer 15

Gain