Method and measurement system for identifying the noise figure of a device under test

A measurement system for identifying the noise figure of a device under test using a modulated signal, the measurement system comprising:

• a signal generator that outputs the modulated signal;
• a device under test;
• and
• an analyzer,
• wherein the measurement system is configured with at least two different measurement setups in which different measurements can be performed:
• the signal generator is directly connected with the analyzer in a first measurement setup;
• the signal generator is directly connected with the device under test as well as the device under test is directly connected with the analyzer directly in a second measurement setup;
• the measurement system being configured to measure the noise contribution of the signal generator and the analyzer in the first measurement setup, and the measurement system being configured to measure the noise contribution of the signal generator, the device under test and the analyzer in the second measurement setup.