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Correlations 2 : Communications 2nd Sem 2526
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Intelligence signal in radio modulation transmission technique is NOT called ______
This are band of light wavelengths, that are too short to be seen by the human eye.
Ideal value of noise figure.
Referred to as the stage in the radio receiver that contributes most of the noise.
Which of the following steps is not included in the process of reception?
Determine the total power gain ratio for a three-stage amplifier with the following gains 10 dBm, 10 dB and 15dB.
Production of radiation by a radio transmitting station
The signal-to-noise ratio is 30 dB at the input to an amplifier and 25 dB at the output. What is the noise ratio of the amplifier?
A mixer circuit has a noise figure of 12dB. It is preceded by an amplifier that has an equivalent noise temperature of 200K and a power gain of 30 dB. Calculate the equivalent noise temperature of the combination referred to as the amplifier input.
A three-stage amplifier has the following power gains and noise figures (as ratios, not decibels) for each stage:
Three-Stage Amplifier
| Stage | Power Gain | Noise Factor | |
|---|---|---|---|
| 1 | 10 | 3 | |
| 2 | 20 | 4 | |
| 3 | 30 | 5 |
Calculate the noise figure.