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SEW > Day 7 - Signal Flow/Link Budgets > Flashcards

Day 7 - Signal Flow/Link Budgets Flashcards

1
Q

What increases the magnitude of signals?

A

Amplifier

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2
Q

What decreases the magnitude of signals?

A

Attentuator

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3
Q

What changes the frequency response of the system?

A

Filter

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4
Q

What changes a signal path?

A

Switch

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5
Q

What combines signals?

A

Mixer

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6
Q

What produces signals?

A

Oscillator

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7
Q

What connects components?

A

Transmission Line

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8
Q

What combines multiple streams of data into one baseband signal?

A

Multiplexer (MUX)

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9
Q

What does a modulator do?

A

Overlays the baseband data onto a carrier wave that results in the intermediate frequency (IF).

Creates the IF.

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10
Q

What increases the modulated waveform from the IF to the RF?

A

Up Converter

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11
Q

What does the HPA do?

A

The High Powered Amplifier raises the signal power to the required output level.

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12
Q

What raises the received low-power signal with minimal addition to noise? (signal is received from the satellite)

A

LNA (Low Noise Amplifier)

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13
Q

What does the Down Converter do?

A

Converts the received RF to IF frequency.

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14
Q

What extracts the baseband signal (from the IF)?

A

Demodulator

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15
Q

What does the DEMUX do?

A

Takes one combined baseband signal and distributes it to individual output lines.

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16
Q

What is the difference between Half Duplex and Full Duplex?

A

Half Duplex cannot send and receive at the same time; Full Duplex can send and receive simultaneously.

Walkie vs Cell

17
Q

What does a Duplexer do?

A

Allows a single antenna to transmit and receive signals.

18
Q

What is the power level required for an isotropic antenna to achieve the same power as the directional antenna?

A

EIRP (Effective Isotropic Radiated Power). “signal strength”.

19
Q

What is loss caused by EM energy spreading out as it travels through space?

A

Free Space Path Loss

Flashlight energy gets dimmer as it travels.

20
Q

What is Fade Margin?

A

The difference between received signal strength and the modem’s receive sensitivity.

SEW (6 decks)

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