The noise figure (F) is independent of the load resistance R_{L} (this is a
general property of two-port networks) [15]. However,
F is dependent on the generator resistance R_{g}.
The output SNR is independent of the load resistance R_{L}.
The power gain G_{p} is independent of the transformer ratio.
The SNR at the input is independent of both the transformer ratio n and the input resistance R_{1}.
Noise figure is independent of modulation, input power level, and bandwidth.
As the bandwidth increases, the input and output SNRs decrease (by the same factor) and the noise figure does not change.
For a given input impedance R1 and generator impedance Rg, the following conditions are met when
the generator is impedance matched to the input impedance (i.e. when R_{g}=R_{1}/n^{2}):
The transducer power gain is maximized.
The available power gain in maximized.
The voltage gain is maximized.
The power delivered to the load is maximized.
The power available from the network is maximized.
The noise figure F is NOT in general minimized for the matched condition.
This is because the internally generated noise from the amplifier (i.e.
thermal noise generated by R_{1})
is dependent on the generator resistance.