This is a Rohde Schwarz ZVB8 Vector Network Analyzer.  This unit is in great shape and guaranteed fully operational.  No options are installed.

The Rohde & Schwarz ZVB8 is a Vector Network Analyzer covering the frequency range from 300 kHz to 8 GHz designed for universal measurements on passive and active components. Especially for multiport measurements and measurements on balanced devices the R&S ZVB simplifies vector analysis. Featuring comprehensive measurement functions, outstanding specifications, high measurement and data transfer speeds plus remote-control capability, the R&S ZVB is the ideal instrument for both development and production