Agilent / HP / Keysight 89411A

The 89411A is a Vector Signal Analyzer Downconverter.

The 89411A IF downconverter works with the Agilent HP 89410A to provide narrowband vector signal analysis at RF and microwave frequencies

The 89411A is designed to use with various Agilent microwave spectrum analyzers and other devices with compatible 21.4 MHz IF outputs. The frequency coverage is available over the complete frequency range of the microwave receiver or analyzer.