The Siglent NSD28 is a noise source driver hardware unit for the Siglent SSA5000A series spectrum analyzer. This unit is used with the SSA5000-NF noise figure measurement software license, which enables the spectrum analyzer to measure the noise figure and gain of various devices, such as amplifiers and converters.
The NSD28 provides a stable and accurate noise source output for the noise figure measurement, with a frequency range of 9 kHz to 7.5 GHz and an output power of -30 dBm to 0 dBm.