Any transistor, amplifier or any other circuit has a certain noise figure which can be measured by a Noise Figure Analyzer or a Spectrum Analyzer with a dedicated software package. In reality the true noise figure is depending on the impedance of the source feeding the DUT.
A typical noise measurement system measures noise at several known soure impedances and so determines the noise parameters (minimum noisefigure: Fmin, complex optimum source impedance or reflection coefficient and the specific noise resistance Rn).

Maury Microwave is offering a full spectrum of tuner solutions for these applications. Users have the choice between very fast and compact electronic tuners (0.3 GHz – 40 GHz) or mechanical tuners (0.25 GHz – 110 GHz) with a broad frequency range and a high VSWR (up to > 30:1). Models are available for coaxial as well as waveguide connection. A detailed description of a typical setup is ready for download below.

	Noise Parameter Measurements (pdf)
	MT7553_Noise_Receiver_Modules (pdf)