noise figure

In most cases only the noise figure of the first stage need be considered.

Low noise figure results in better reception of signal.

An amplifier with a 0 dB noise figure would be perfect.

Thus, the noise figure of tube amplifiers increases with frequency.

In this way, the cable losses are now negligible and do not significantly affect the system noise figure.

To obtain low noise figure the impedance of the source can be increased by a transformer.

From those measurements and the characteristics of the noise source, the noise figure can be calculated.

This means the input impedance can no longer be increased arbitrarily in order to reduce the noise figure.

The total noise factor can then be used to calculate the total noise figure.

Mixer circuits are characterized by their properties such as conversion gain (or loss), and noise figure.

It must have a lower noise figure; that is when the TMA comes into use.

Updating the Friis formula with this case, the noise figure is now:

Some noise figure meters need a calibrated broadband noise source.

The vector error correction permits higher accuracy than is possible with other forms of commercial noise figure meters.

The noise figure is the noise factor, given in dB:

Therefore the amplifier chain can be modelled as a black box having a gain of and a noise figure given by .

As a result, it is essential that the receiver should have a low noise figure, high dynamic range and high linearity.

Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters.

The ideal LNB would have a noise figure of 0dB.

Noise figure varies according to the operating frequency for a same LNA.

Noise figure is not usually an issue for power amplifier valves, however, in receivers using valves it can be important.

Every LNB off the production line has a different noise figure because of manufacturing tolerances.

The transducer selected should have a maximum gain and minimum noise figure(NF).

One use of noise temperature is in the definition of a system's noise factor or noise figure.

With the low noise figure LNA must have high gain for the processing of signal into post circuit.