The Keysight / Agilent / HP 8970B noise figure meter takes the mystery out of noise figure measurements, making them easy, accurate and repeatable. The 8970B can be used with the 346 or 347 family noise sources. Low instrument uncertainty and automatic second-stage correction make it possible to make accurate noise figure readings, even for low-gain devices. The instrument has special measurement modes for mixer measurement and is capable of controlling external local oscillators and the 8971C noise figure test set.