Rohde & Schwarz FS-SNS40 (1338.8008.40)

To perform noise figure and gain measurements with a spectrum analyzer, an excess noise ratio (ENR) source is needed that adds a well-defined (and ideally “white”) noise to the input of the DUT. The Y factor is the ratio of the noise power at the output of the DUT with and without this added noise. It forms the basis for calculating the amount of noise contributed by the DUT and its resulting noise figure and gain.

Although the characteristics of the output signal of a noise source in the specified frequency range comes close to white noise, it still has a slight frequency response and temperature dependency. To eliminate this deviation from ideal behavior, noise sources come with written tables that indicate the ENR behavior of the noise source with respect to frequency and temperature. These correction values must be manually transferred to the noise figure measurement software.

The FS-SNS smart noise sources eliminate this time consuming and error prone activity by providing the ENR tables and environmental temperature to the spectrum analyzer in electronic format.

The FS-SNS smart noise sources are connected to the analyzer via a 7-pin cable for power supply and control interface. An adapter cable is supplied for instruments not equipped with the necessary connector.

FSN-SNS

Smart Noise Source

APC 3.5 mm male

(compatible with SMA)

2.92 mm male

(compatible with SMA)

1.85 mm male

(compatible with 2.4 mm)

1.85 mm male

(compatible with 2.4 mm)