Keysight NFA Series Performance Verification And Calibration Manual page 119

Modes
Amplifier
Downconverter in DUT
Upconverter in DUT
System downconverter
Loss compensation
SNS Series Noise
Source
With fixed or variable IF
Instrument can control an external LO via dedicated 'LO GPIB' connector
With fixed or variable IF
Instrument can control an external LO via dedicated 'LO GPIB' connector
Allows the use of an external downconverting mixer as part of the
measurement system. Instrument can control an external LO via
dedicated 'LO GPIB' connector
Single value between noise source and DUT, and between DUT and
analyzer
ENR tables automatic upload. Continuous upload of T
Chapter 3
Technical Specifications
Measurement
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cold
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